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<div class="subTitle">org.apache.hadoop.hbase.util</div>
<h2 title="Class CommonFSUtils" class="title">Class CommonFSUtils</h2>
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<pre>@InterfaceAudience.Private
public final class <a href="../../../../../src-html/org/apache/hadoop/hbase/util/CommonFSUtils.html#line.54">CommonFSUtils</a>
extends <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</a></pre>
<div class="block">Utility methods for interacting with the underlying file system.
<p/>
Note that <a href="../../../../../org/apache/hadoop/hbase/util/CommonFSUtils.html#setStoragePolicy-org.apache.hadoop.fs.FileSystem-org.apache.hadoop.fs.Path-java.lang.String-"><code>setStoragePolicy(FileSystem, Path, String)</code></a> is tested in TestFSUtils and
pre-commit will run the hbase-server tests if there's code change in this class. See
<a href="https://issues.apache.org/jira/browse/HBASE-20838">HBASE-20838</a> for more details.</div>
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<tr class="altColor">
<td class="colFirst"><code>static class&nbsp;</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/util/CommonFSUtils.StreamLacksCapabilityException.html" title="class in org.apache.hadoop.hbase.util">CommonFSUtils.StreamLacksCapabilityException</a></span></code>
<div class="block">Helper exception for those cases where the place where we need to check a stream capability
is not where we have the needed context to explain the impact and mitigation for a lack.</div>
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<tr class="altColor">
<td class="colFirst"><code>static <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/util/CommonFSUtils.html#FULL_RWX_PERMISSIONS">FULL_RWX_PERMISSIONS</a></span></code>
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<td class="colFirst"><code>static <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/util/CommonFSUtils.html#HBASE_WAL_DIR">HBASE_WAL_DIR</a></span></code>
<div class="block">Parameter name for HBase WAL directory</div>
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<td class="colFirst"><code>private static org.slf4j.Logger</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/util/CommonFSUtils.html#LOG">LOG</a></span></code>&nbsp;</td>
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<td class="colFirst"><code>static <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a></code></td>
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<div class="block">Parameter to disable stream capability enforcement checks</div>
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<tr class="altColor">
<td class="colFirst"><code>private static <a href="https://docs.oracle.com/javase/8/docs/api/java/util/Map.html?is-external=true" title="class or interface in java.util">Map</a>&lt;org.apache.hadoop.fs.FileSystem,<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Boolean.html?is-external=true" title="class or interface in java.lang">Boolean</a>&gt;</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/util/CommonFSUtils.html#warningMap">warningMap</a></span></code>&nbsp;</td>
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<td class="colFirst"><code>private </code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/util/CommonFSUtils.html#CommonFSUtils--">CommonFSUtils</a></span>()</code>&nbsp;</td>
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<caption><span id="t0" class="activeTableTab"><span>All Methods</span><span class="tabEnd">&nbsp;</span></span><span id="t1" class="tableTab"><span><a href="javascript:show(1);">Static Methods</a></span><span class="tabEnd">&nbsp;</span></span><span id="t4" class="tableTab"><span><a href="javascript:show(8);">Concrete Methods</a></span><span class="tabEnd">&nbsp;</span></span><span id="t6" class="tableTab"><span><a href="javascript:show(32);">Deprecated Methods</a></span><span class="tabEnd">&nbsp;</span></span></caption>
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<td class="colFirst"><code>static void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/util/CommonFSUtils.html#checkShortCircuitReadBufferSize-org.apache.hadoop.conf.Configuration-">checkShortCircuitReadBufferSize</a></span>(org.apache.hadoop.conf.Configuration&nbsp;conf)</code>
<div class="block">Check if short circuit read buffer size is set and if not, set it to hbase value.</div>
</td>
</tr>
<tr id="i1" class="rowColor">
<td class="colFirst"><code>static org.apache.hadoop.fs.FSDataOutputStream</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/util/CommonFSUtils.html#create-org.apache.hadoop.fs.FileSystem-org.apache.hadoop.fs.Path-org.apache.hadoop.fs.permission.FsPermission-boolean-">create</a></span>(org.apache.hadoop.fs.FileSystem&nbsp;fs,
org.apache.hadoop.fs.Path&nbsp;path,
org.apache.hadoop.fs.permission.FsPermission&nbsp;perm,
boolean&nbsp;overwrite)</code>
<div class="block">Create the specified file on the filesystem.</div>
</td>
</tr>
<tr id="i2" class="altColor">
<td class="colFirst"><code>static boolean</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/util/CommonFSUtils.html#delete-org.apache.hadoop.fs.FileSystem-org.apache.hadoop.fs.Path-boolean-">delete</a></span>(org.apache.hadoop.fs.FileSystem&nbsp;fs,
org.apache.hadoop.fs.Path&nbsp;path,
boolean&nbsp;recursive)</code>
<div class="block">Calls fs.delete() and returns the value returned by the fs.delete()</div>
</td>
</tr>
<tr id="i3" class="rowColor">
<td class="colFirst"><code>static boolean</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/util/CommonFSUtils.html#deleteDirectory-org.apache.hadoop.fs.FileSystem-org.apache.hadoop.fs.Path-">deleteDirectory</a></span>(org.apache.hadoop.fs.FileSystem&nbsp;fs,
org.apache.hadoop.fs.Path&nbsp;dir)</code>
<div class="block">Delete if exists.</div>
</td>
</tr>
<tr id="i4" class="altColor">
<td class="colFirst"><code>static org.apache.hadoop.fs.FileSystem</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/util/CommonFSUtils.html#getCurrentFileSystem-org.apache.hadoop.conf.Configuration-">getCurrentFileSystem</a></span>(org.apache.hadoop.conf.Configuration&nbsp;conf)</code>&nbsp;</td>
</tr>
<tr id="i5" class="rowColor">
<td class="colFirst"><code>static long</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/util/CommonFSUtils.html#getDefaultBlockSize-org.apache.hadoop.fs.FileSystem-org.apache.hadoop.fs.Path-">getDefaultBlockSize</a></span>(org.apache.hadoop.fs.FileSystem&nbsp;fs,
org.apache.hadoop.fs.Path&nbsp;path)</code>
<div class="block">Return the number of bytes that large input files should be optimally
be split into to minimize i/o time.</div>
</td>
</tr>
<tr id="i6" class="altColor">
<td class="colFirst"><code>static int</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/util/CommonFSUtils.html#getDefaultBufferSize-org.apache.hadoop.fs.FileSystem-">getDefaultBufferSize</a></span>(org.apache.hadoop.fs.FileSystem&nbsp;fs)</code>
<div class="block">Returns the default buffer size to use during writes.</div>
</td>
</tr>
<tr id="i7" class="rowColor">
<td class="colFirst"><code>static short</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/util/CommonFSUtils.html#getDefaultReplication-org.apache.hadoop.fs.FileSystem-org.apache.hadoop.fs.Path-">getDefaultReplication</a></span>(org.apache.hadoop.fs.FileSystem&nbsp;fs,
org.apache.hadoop.fs.Path&nbsp;path)</code>&nbsp;</td>
</tr>
<tr id="i8" class="altColor">
<td class="colFirst"><code>static <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/util/CommonFSUtils.html#getDirUri-org.apache.hadoop.conf.Configuration-org.apache.hadoop.fs.Path-">getDirUri</a></span>(org.apache.hadoop.conf.Configuration&nbsp;c,
org.apache.hadoop.fs.Path&nbsp;p)</code>
<div class="block">Returns the URI in the string format</div>
</td>
</tr>
<tr id="i9" class="rowColor">
<td class="colFirst"><code>static org.apache.hadoop.fs.permission.FsPermission</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/util/CommonFSUtils.html#getFilePermissions-org.apache.hadoop.fs.FileSystem-org.apache.hadoop.conf.Configuration-java.lang.String-">getFilePermissions</a></span>(org.apache.hadoop.fs.FileSystem&nbsp;fs,
org.apache.hadoop.conf.Configuration&nbsp;conf,
<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>&nbsp;permssionConfKey)</code>
<div class="block">Get the file permissions specified in the configuration, if they are
enabled.</div>
</td>
</tr>
<tr id="i10" class="altColor">
<td class="colFirst"><code>static org.apache.hadoop.fs.Path</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/util/CommonFSUtils.html#getNamespaceDir-org.apache.hadoop.fs.Path-java.lang.String-">getNamespaceDir</a></span>(org.apache.hadoop.fs.Path&nbsp;rootdir,
<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>&nbsp;namespace)</code>
<div class="block">Returns the <code>Path</code> object representing
the namespace directory under path rootdir</div>
</td>
</tr>
<tr id="i11" class="rowColor">
<td class="colFirst"><code>static <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/util/CommonFSUtils.html#getPath-org.apache.hadoop.fs.Path-">getPath</a></span>(org.apache.hadoop.fs.Path&nbsp;p)</code>
<div class="block">Return the 'path' component of a Path.</div>
</td>
</tr>
<tr id="i12" class="altColor">
<td class="colFirst"><code>static org.apache.hadoop.fs.Path</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/util/CommonFSUtils.html#getRegionDir-org.apache.hadoop.fs.Path-org.apache.hadoop.hbase.TableName-java.lang.String-">getRegionDir</a></span>(org.apache.hadoop.fs.Path&nbsp;rootdir,
<a href="../../../../../org/apache/hadoop/hbase/TableName.html" title="class in org.apache.hadoop.hbase">TableName</a>&nbsp;tableName,
<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>&nbsp;regionName)</code>
<div class="block">Returns the <code>Path</code> object representing the region directory under
path rootdir</div>
</td>
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<tr id="i13" class="rowColor">
<td class="colFirst"><code>static org.apache.hadoop.fs.Path</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/util/CommonFSUtils.html#getRootDir-org.apache.hadoop.conf.Configuration-">getRootDir</a></span>(org.apache.hadoop.conf.Configuration&nbsp;c)</code>&nbsp;</td>
</tr>
<tr id="i14" class="altColor">
<td class="colFirst"><code>static org.apache.hadoop.fs.FileSystem</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/util/CommonFSUtils.html#getRootDirFileSystem-org.apache.hadoop.conf.Configuration-">getRootDirFileSystem</a></span>(org.apache.hadoop.conf.Configuration&nbsp;c)</code>&nbsp;</td>
</tr>
<tr id="i15" class="rowColor">
<td class="colFirst"><code>static org.apache.hadoop.fs.Path</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/util/CommonFSUtils.html#getTableDir-org.apache.hadoop.fs.Path-org.apache.hadoop.hbase.TableName-">getTableDir</a></span>(org.apache.hadoop.fs.Path&nbsp;rootdir,
<a href="../../../../../org/apache/hadoop/hbase/TableName.html" title="class in org.apache.hadoop.hbase">TableName</a>&nbsp;tableName)</code>
<div class="block">Returns the <code>Path</code> object representing the table directory under
path rootdir</div>
</td>
</tr>
<tr id="i16" class="altColor">
<td class="colFirst"><code>static <a href="../../../../../org/apache/hadoop/hbase/TableName.html" title="class in org.apache.hadoop.hbase">TableName</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/util/CommonFSUtils.html#getTableName-org.apache.hadoop.fs.Path-">getTableName</a></span>(org.apache.hadoop.fs.Path&nbsp;tablePath)</code>
<div class="block">Returns the <a href="../../../../../org/apache/hadoop/hbase/TableName.html" title="class in org.apache.hadoop.hbase"><code>TableName</code></a> object representing
the table directory under
path rootdir</div>
</td>
</tr>
<tr id="i17" class="rowColor">
<td class="colFirst"><code>static org.apache.hadoop.fs.FileSystem</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/util/CommonFSUtils.html#getWALFileSystem-org.apache.hadoop.conf.Configuration-">getWALFileSystem</a></span>(org.apache.hadoop.conf.Configuration&nbsp;c)</code>&nbsp;</td>
</tr>
<tr id="i18" class="altColor">
<td class="colFirst"><code>static org.apache.hadoop.fs.Path</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/util/CommonFSUtils.html#getWALRegionDir-org.apache.hadoop.conf.Configuration-org.apache.hadoop.hbase.TableName-java.lang.String-">getWALRegionDir</a></span>(org.apache.hadoop.conf.Configuration&nbsp;conf,
<a href="../../../../../org/apache/hadoop/hbase/TableName.html" title="class in org.apache.hadoop.hbase">TableName</a>&nbsp;tableName,
<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>&nbsp;encodedRegionName)</code>
<div class="block">Returns the WAL region directory based on the given table name and region name</div>
</td>
</tr>
<tr id="i19" class="rowColor">
<td class="colFirst"><code>static org.apache.hadoop.fs.Path</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/util/CommonFSUtils.html#getWALRootDir-org.apache.hadoop.conf.Configuration-">getWALRootDir</a></span>(org.apache.hadoop.conf.Configuration&nbsp;c)</code>&nbsp;</td>
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<tr id="i20" class="altColor">
<td class="colFirst"><code>static org.apache.hadoop.fs.Path</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/util/CommonFSUtils.html#getWALTableDir-org.apache.hadoop.conf.Configuration-org.apache.hadoop.hbase.TableName-">getWALTableDir</a></span>(org.apache.hadoop.conf.Configuration&nbsp;conf,
<a href="../../../../../org/apache/hadoop/hbase/TableName.html" title="class in org.apache.hadoop.hbase">TableName</a>&nbsp;tableName)</code>
<div class="block">Returns the Table directory under the WALRootDir for the specified table name</div>
</td>
</tr>
<tr id="i21" class="rowColor">
<td class="colFirst"><code>static org.apache.hadoop.fs.Path</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/util/CommonFSUtils.html#getWrongWALRegionDir-org.apache.hadoop.conf.Configuration-org.apache.hadoop.hbase.TableName-java.lang.String-">getWrongWALRegionDir</a></span>(org.apache.hadoop.conf.Configuration&nbsp;conf,
<a href="../../../../../org/apache/hadoop/hbase/TableName.html" title="class in org.apache.hadoop.hbase">TableName</a>&nbsp;tableName,
<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>&nbsp;encodedRegionName)</code>
<div class="block"><span class="deprecatedLabel">Deprecated.</span>&nbsp;
<div class="block"><span class="deprecationComment">For compatibility, will be removed in 4.0.0.</span></div>
</div>
</td>
</tr>
<tr id="i22" class="altColor">
<td class="colFirst"><code>private static void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/util/CommonFSUtils.html#invokeSetStoragePolicy-org.apache.hadoop.fs.FileSystem-org.apache.hadoop.fs.Path-java.lang.String-">invokeSetStoragePolicy</a></span>(org.apache.hadoop.fs.FileSystem&nbsp;fs,
org.apache.hadoop.fs.Path&nbsp;path,
<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>&nbsp;storagePolicy)</code>&nbsp;</td>
</tr>
<tr id="i23" class="rowColor">
<td class="colFirst"><code>static boolean</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/util/CommonFSUtils.html#isExists-org.apache.hadoop.fs.FileSystem-org.apache.hadoop.fs.Path-">isExists</a></span>(org.apache.hadoop.fs.FileSystem&nbsp;fs,
org.apache.hadoop.fs.Path&nbsp;path)</code>
<div class="block">Calls fs.exists().</div>
</td>
</tr>
<tr id="i24" class="altColor">
<td class="colFirst"><code>static boolean</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/util/CommonFSUtils.html#isHDFS-org.apache.hadoop.conf.Configuration-">isHDFS</a></span>(org.apache.hadoop.conf.Configuration&nbsp;conf)</code>&nbsp;</td>
</tr>
<tr id="i25" class="rowColor">
<td class="colFirst"><code>static boolean</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/util/CommonFSUtils.html#isMatchingTail-org.apache.hadoop.fs.Path-org.apache.hadoop.fs.Path-">isMatchingTail</a></span>(org.apache.hadoop.fs.Path&nbsp;pathToSearch,
org.apache.hadoop.fs.Path&nbsp;pathTail)</code>
<div class="block">Compare path component of the Path URI; e.g.</div>
</td>
</tr>
<tr id="i26" class="altColor">
<td class="colFirst"><code>static boolean</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/util/CommonFSUtils.html#isMatchingTail-org.apache.hadoop.fs.Path-java.lang.String-">isMatchingTail</a></span>(org.apache.hadoop.fs.Path&nbsp;pathToSearch,
<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>&nbsp;pathTail)</code>
<div class="block">Compare path component of the Path URI; e.g.</div>
</td>
</tr>
<tr id="i27" class="rowColor">
<td class="colFirst"><code>static boolean</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/util/CommonFSUtils.html#isRecoveredEdits-org.apache.hadoop.fs.Path-">isRecoveredEdits</a></span>(org.apache.hadoop.fs.Path&nbsp;path)</code>
<div class="block">Checks if the given path is the one with 'recovered.edits' dir.</div>
</td>
</tr>
<tr id="i28" class="altColor">
<td class="colFirst"><code>static boolean</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/util/CommonFSUtils.html#isStartingWithPath-org.apache.hadoop.fs.Path-java.lang.String-">isStartingWithPath</a></span>(org.apache.hadoop.fs.Path&nbsp;rootPath,
<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>&nbsp;path)</code>
<div class="block">Compare of path component.</div>
</td>
</tr>
<tr id="i29" class="rowColor">
<td class="colFirst"><code>private static boolean</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/util/CommonFSUtils.html#isValidWALRootDir-org.apache.hadoop.fs.Path-org.apache.hadoop.conf.Configuration-">isValidWALRootDir</a></span>(org.apache.hadoop.fs.Path&nbsp;walDir,
org.apache.hadoop.conf.Configuration&nbsp;c)</code>&nbsp;</td>
</tr>
<tr id="i30" class="altColor">
<td class="colFirst"><code>static <a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a>&lt;org.apache.hadoop.fs.LocatedFileStatus&gt;</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/util/CommonFSUtils.html#listLocatedStatus-org.apache.hadoop.fs.FileSystem-org.apache.hadoop.fs.Path-">listLocatedStatus</a></span>(org.apache.hadoop.fs.FileSystem&nbsp;fs,
org.apache.hadoop.fs.Path&nbsp;dir)</code>
<div class="block">Calls fs.listFiles() to get FileStatus and BlockLocations together for reducing rpc call</div>
</td>
</tr>
<tr id="i31" class="rowColor">
<td class="colFirst"><code>static org.apache.hadoop.fs.FileStatus[]</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/util/CommonFSUtils.html#listStatus-org.apache.hadoop.fs.FileSystem-org.apache.hadoop.fs.Path-">listStatus</a></span>(org.apache.hadoop.fs.FileSystem&nbsp;fs,
org.apache.hadoop.fs.Path&nbsp;dir)</code>
<div class="block">Calls fs.listStatus() and treats FileNotFoundException as non-fatal
This would accommodates differences between hadoop versions</div>
</td>
</tr>
<tr id="i32" class="altColor">
<td class="colFirst"><code>static org.apache.hadoop.fs.FileStatus[]</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/util/CommonFSUtils.html#listStatus-org.apache.hadoop.fs.FileSystem-org.apache.hadoop.fs.Path-org.apache.hadoop.fs.PathFilter-">listStatus</a></span>(org.apache.hadoop.fs.FileSystem&nbsp;fs,
org.apache.hadoop.fs.Path&nbsp;dir,
org.apache.hadoop.fs.PathFilter&nbsp;filter)</code>
<div class="block">Calls fs.listStatus() and treats FileNotFoundException as non-fatal
This accommodates differences between hadoop versions, where hadoop 1
does not throw a FileNotFoundException, and return an empty FileStatus[]
while Hadoop 2 will throw FileNotFoundException.</div>
</td>
</tr>
<tr id="i33" class="rowColor">
<td class="colFirst"><code>static void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/util/CommonFSUtils.html#logFileSystemState-org.apache.hadoop.fs.FileSystem-org.apache.hadoop.fs.Path-org.slf4j.Logger-">logFileSystemState</a></span>(org.apache.hadoop.fs.FileSystem&nbsp;fs,
org.apache.hadoop.fs.Path&nbsp;root,
org.slf4j.Logger&nbsp;log)</code>
<div class="block">Log the current state of the filesystem from a certain root directory</div>
</td>
</tr>
<tr id="i34" class="altColor">
<td class="colFirst"><code>private static void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/util/CommonFSUtils.html#logFSTree-org.slf4j.Logger-org.apache.hadoop.fs.FileSystem-org.apache.hadoop.fs.Path-java.lang.String-">logFSTree</a></span>(org.slf4j.Logger&nbsp;log,
org.apache.hadoop.fs.FileSystem&nbsp;fs,
org.apache.hadoop.fs.Path&nbsp;root,
<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>&nbsp;prefix)</code>
<div class="block">Recursive helper to log the state of the FS</div>
</td>
</tr>
<tr id="i35" class="rowColor">
<td class="colFirst"><code>static <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/util/CommonFSUtils.html#removeWALRootPath-org.apache.hadoop.fs.Path-org.apache.hadoop.conf.Configuration-">removeWALRootPath</a></span>(org.apache.hadoop.fs.Path&nbsp;path,
org.apache.hadoop.conf.Configuration&nbsp;conf)</code>
<div class="block">Checks for the presence of the WAL log root path (using the provided conf object) in the given
path.</div>
</td>
</tr>
<tr id="i36" class="altColor">
<td class="colFirst"><code>static boolean</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/util/CommonFSUtils.html#renameAndSetModifyTime-org.apache.hadoop.fs.FileSystem-org.apache.hadoop.fs.Path-org.apache.hadoop.fs.Path-">renameAndSetModifyTime</a></span>(org.apache.hadoop.fs.FileSystem&nbsp;fs,
org.apache.hadoop.fs.Path&nbsp;src,
org.apache.hadoop.fs.Path&nbsp;dest)</code>&nbsp;</td>
</tr>
<tr id="i37" class="rowColor">
<td class="colFirst"><code>static void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/util/CommonFSUtils.html#setFsDefault-org.apache.hadoop.conf.Configuration-org.apache.hadoop.fs.Path-">setFsDefault</a></span>(org.apache.hadoop.conf.Configuration&nbsp;c,
org.apache.hadoop.fs.Path&nbsp;root)</code>&nbsp;</td>
</tr>
<tr id="i38" class="altColor">
<td class="colFirst"><code>static void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/util/CommonFSUtils.html#setFsDefault-org.apache.hadoop.conf.Configuration-java.lang.String-">setFsDefault</a></span>(org.apache.hadoop.conf.Configuration&nbsp;c,
<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>&nbsp;uri)</code>&nbsp;</td>
</tr>
<tr id="i39" class="rowColor">
<td class="colFirst"><code>static void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/util/CommonFSUtils.html#setRootDir-org.apache.hadoop.conf.Configuration-org.apache.hadoop.fs.Path-">setRootDir</a></span>(org.apache.hadoop.conf.Configuration&nbsp;c,
org.apache.hadoop.fs.Path&nbsp;root)</code>&nbsp;</td>
</tr>
<tr id="i40" class="altColor">
<td class="colFirst"><code>static void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/util/CommonFSUtils.html#setStoragePolicy-org.apache.hadoop.fs.FileSystem-org.apache.hadoop.fs.Path-java.lang.String-">setStoragePolicy</a></span>(org.apache.hadoop.fs.FileSystem&nbsp;fs,
org.apache.hadoop.fs.Path&nbsp;path,
<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>&nbsp;storagePolicy)</code>
<div class="block">Sets storage policy for given path.</div>
</td>
</tr>
<tr id="i41" class="rowColor">
<td class="colFirst"><code>(package private) static void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/util/CommonFSUtils.html#setStoragePolicy-org.apache.hadoop.fs.FileSystem-org.apache.hadoop.fs.Path-java.lang.String-boolean-">setStoragePolicy</a></span>(org.apache.hadoop.fs.FileSystem&nbsp;fs,
org.apache.hadoop.fs.Path&nbsp;path,
<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>&nbsp;storagePolicy,
boolean&nbsp;throwException)</code>&nbsp;</td>
</tr>
<tr id="i42" class="altColor">
<td class="colFirst"><code>static void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/util/CommonFSUtils.html#setWALRootDir-org.apache.hadoop.conf.Configuration-org.apache.hadoop.fs.Path-">setWALRootDir</a></span>(org.apache.hadoop.conf.Configuration&nbsp;c,
org.apache.hadoop.fs.Path&nbsp;root)</code>&nbsp;</td>
</tr>
<tr id="i43" class="rowColor">
<td class="colFirst"><code>static org.apache.hadoop.fs.Path</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/util/CommonFSUtils.html#validateRootPath-org.apache.hadoop.fs.Path-">validateRootPath</a></span>(org.apache.hadoop.fs.Path&nbsp;root)</code>
<div class="block">Verifies root directory path is a valid URI with a scheme</div>
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<h3>Methods inherited from class&nbsp;java.lang.<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</a></h3>
<code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#clone--" title="class or interface in java.lang">clone</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#equals-java.lang.Object-" title="class or interface in java.lang">equals</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#finalize--" title="class or interface in java.lang">finalize</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#getClass--" title="class or interface in java.lang">getClass</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#hashCode--" title="class or interface in java.lang">hashCode</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#notify--" title="class or interface in java.lang">notify</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#notifyAll--" title="class or interface in java.lang">notifyAll</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#toString--" title="class or interface in java.lang">toString</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#wait--" title="class or interface in java.lang">wait</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#wait-long-" title="class or interface in java.lang">wait</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#wait-long-int-" title="class or interface in java.lang">wait</a></code></li>
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<pre>private static final&nbsp;org.slf4j.Logger <a href="../../../../../src-html/org/apache/hadoop/hbase/util/CommonFSUtils.html#line.55">LOG</a></pre>
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<pre>public static final&nbsp;<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> <a href="../../../../../src-html/org/apache/hadoop/hbase/util/CommonFSUtils.html#line.58">HBASE_WAL_DIR</a></pre>
<div class="block">Parameter name for HBase WAL directory</div>
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<dd><a href="../../../../../constant-values.html#org.apache.hadoop.hbase.util.CommonFSUtils.HBASE_WAL_DIR">Constant Field Values</a></dd>
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<div class="block">Parameter to disable stream capability enforcement checks</div>
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<div class="block">Full access permissions (starting point for a umask)</div>
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<pre>private static final&nbsp;<a href="https://docs.oracle.com/javase/8/docs/api/java/util/Map.html?is-external=true" title="class or interface in java.util">Map</a>&lt;org.apache.hadoop.fs.FileSystem,<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Boolean.html?is-external=true" title="class or interface in java.lang">Boolean</a>&gt; <a href="../../../../../src-html/org/apache/hadoop/hbase/util/CommonFSUtils.html#line.479">warningMap</a></pre>
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<pre>private&nbsp;<a href="../../../../../src-html/org/apache/hadoop/hbase/util/CommonFSUtils.html#line.67">CommonFSUtils</a>()</pre>
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<pre>public static&nbsp;boolean&nbsp;<a href="../../../../../src-html/org/apache/hadoop/hbase/util/CommonFSUtils.html#line.78">isStartingWithPath</a>(org.apache.hadoop.fs.Path&nbsp;rootPath,
<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>&nbsp;path)</pre>
<div class="block">Compare of path component. Does not consider schema; i.e. if schemas
different but <code>path</code> starts with <code>rootPath</code>,
then the function returns true</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>rootPath</code> - value to check for</dd>
<dd><code>path</code> - subject to check</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>True if <code>path</code> starts with <code>rootPath</code></dd>
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<pre>public static&nbsp;boolean&nbsp;<a href="../../../../../src-html/org/apache/hadoop/hbase/util/CommonFSUtils.html#line.92">isMatchingTail</a>(org.apache.hadoop.fs.Path&nbsp;pathToSearch,
<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>&nbsp;pathTail)</pre>
<div class="block">Compare path component of the Path URI; e.g. if hdfs://a/b/c and /a/b/c, it will compare the
'/a/b/c' part. Does not consider schema; i.e. if schemas different but path or subpath matches,
the two will equate.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>pathToSearch</code> - Path we will be trying to match against.</dd>
<dd><code>pathTail</code> - what to match</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>True if <code>pathTail</code> is tail on the path of <code>pathToSearch</code></dd>
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<pre>public static&nbsp;boolean&nbsp;<a href="../../../../../src-html/org/apache/hadoop/hbase/util/CommonFSUtils.html#line.104">isMatchingTail</a>(org.apache.hadoop.fs.Path&nbsp;pathToSearch,
org.apache.hadoop.fs.Path&nbsp;pathTail)</pre>
<div class="block">Compare path component of the Path URI; e.g. if hdfs://a/b/c and /a/b/c, it will compare the
'/a/b/c' part. If you passed in 'hdfs://a/b/c and b/c, it would return true. Does not consider
schema; i.e. if schemas different but path or subpath matches, the two will equate.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>pathToSearch</code> - Path we will be trying to match agains against</dd>
<dd><code>pathTail</code> - what to match</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>True if <code>pathTail</code> is tail on the path of <code>pathToSearch</code></dd>
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<pre>public static&nbsp;boolean&nbsp;<a href="../../../../../src-html/org/apache/hadoop/hbase/util/CommonFSUtils.html#line.137">deleteDirectory</a>(org.apache.hadoop.fs.FileSystem&nbsp;fs,
org.apache.hadoop.fs.Path&nbsp;dir)
throws <a href="https://docs.oracle.com/javase/8/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></pre>
<div class="block">Delete if exists.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>fs</code> - filesystem object</dd>
<dd><code>dir</code> - directory to delete</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>True if deleted <code>dir</code></dd>
<dt><span class="throwsLabel">Throws:</span></dt>
<dd><code><a href="https://docs.oracle.com/javase/8/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></code> - e</dd>
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<h4>getDefaultBlockSize</h4>
<pre>public static&nbsp;long&nbsp;<a href="../../../../../src-html/org/apache/hadoop/hbase/util/CommonFSUtils.html#line.148">getDefaultBlockSize</a>(org.apache.hadoop.fs.FileSystem&nbsp;fs,
org.apache.hadoop.fs.Path&nbsp;path)</pre>
<div class="block">Return the number of bytes that large input files should be optimally
be split into to minimize i/o time.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>fs</code> - filesystem object</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>the default block size for the path's filesystem</dd>
</dl>
</li>
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<h4>getDefaultReplication</h4>
<pre>public static&nbsp;short&nbsp;<a href="../../../../../src-html/org/apache/hadoop/hbase/util/CommonFSUtils.html#line.159">getDefaultReplication</a>(org.apache.hadoop.fs.FileSystem&nbsp;fs,
org.apache.hadoop.fs.Path&nbsp;path)</pre>
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<h4>getDefaultBufferSize</h4>
<pre>public static&nbsp;int&nbsp;<a href="../../../../../src-html/org/apache/hadoop/hbase/util/CommonFSUtils.html#line.173">getDefaultBufferSize</a>(org.apache.hadoop.fs.FileSystem&nbsp;fs)</pre>
<div class="block">Returns the default buffer size to use during writes.
The size of the buffer should probably be a multiple of hardware
page size (4096 on Intel x86), and it determines how much data is
buffered during read and write operations.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>fs</code> - filesystem object</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>default buffer size to use during writes</dd>
</dl>
</li>
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<a name="create-org.apache.hadoop.fs.FileSystem-org.apache.hadoop.fs.Path-org.apache.hadoop.fs.permission.FsPermission-boolean-">
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<h4>create</h4>
<pre>public static&nbsp;org.apache.hadoop.fs.FSDataOutputStream&nbsp;<a href="../../../../../src-html/org/apache/hadoop/hbase/util/CommonFSUtils.html#line.194">create</a>(org.apache.hadoop.fs.FileSystem&nbsp;fs,
org.apache.hadoop.fs.Path&nbsp;path,
org.apache.hadoop.fs.permission.FsPermission&nbsp;perm,
boolean&nbsp;overwrite)
throws <a href="https://docs.oracle.com/javase/8/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></pre>
<div class="block">Create the specified file on the filesystem. By default, this will:
<ol>
<li>apply the umask in the configuration (if it is enabled)</li>
<li>use the fs configured buffer size (or 4096 if not set)</li>
<li>use the default replication</li>
<li>use the default block size</li>
<li>not track progress</li>
</ol></div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>fs</code> - <code>FileSystem</code> on which to write the file</dd>
<dd><code>path</code> - <code>Path</code> to the file to write</dd>
<dd><code>perm</code> - intial permissions</dd>
<dd><code>overwrite</code> - Whether or not the created file should be overwritten.</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>output stream to the created file</dd>
<dt><span class="throwsLabel">Throws:</span></dt>
<dd><code><a href="https://docs.oracle.com/javase/8/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></code> - if the file cannot be created</dd>
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<pre>public static&nbsp;org.apache.hadoop.fs.permission.FsPermission&nbsp;<a href="../../../../../src-html/org/apache/hadoop/hbase/util/CommonFSUtils.html#line.216">getFilePermissions</a>(org.apache.hadoop.fs.FileSystem&nbsp;fs,
org.apache.hadoop.conf.Configuration&nbsp;conf,
<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>&nbsp;permssionConfKey)</pre>
<div class="block">Get the file permissions specified in the configuration, if they are
enabled.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>fs</code> - filesystem that the file will be created on.</dd>
<dd><code>conf</code> - configuration to read for determining if permissions are
enabled and which to use</dd>
<dd><code>permssionConfKey</code> - property key in the configuration to use when
finding the permission</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>the permission to use when creating a new file on the fs. If
special permissions are not specified in the configuration, then
the default permissions on the the fs will be returned.</dd>
</dl>
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<h4>validateRootPath</h4>
<pre>public static&nbsp;org.apache.hadoop.fs.Path&nbsp;<a href="../../../../../src-html/org/apache/hadoop/hbase/util/CommonFSUtils.html#line.250">validateRootPath</a>(org.apache.hadoop.fs.Path&nbsp;root)
throws <a href="https://docs.oracle.com/javase/8/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></pre>
<div class="block">Verifies root directory path is a valid URI with a scheme</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>root</code> - root directory path</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>Passed <code>root</code> argument.</dd>
<dt><span class="throwsLabel">Throws:</span></dt>
<dd><code><a href="https://docs.oracle.com/javase/8/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></code> - if not a valid URI with a scheme</dd>
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<h4>removeWALRootPath</h4>
<pre>public static&nbsp;<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>&nbsp;<a href="../../../../../src-html/org/apache/hadoop/hbase/util/CommonFSUtils.html#line.273">removeWALRootPath</a>(org.apache.hadoop.fs.Path&nbsp;path,
org.apache.hadoop.conf.Configuration&nbsp;conf)
throws <a href="https://docs.oracle.com/javase/8/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></pre>
<div class="block">Checks for the presence of the WAL log root path (using the provided conf object) in the given
path. If it exists, this method removes it and returns the String representation of remaining
relative path.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>path</code> - must not be null</dd>
<dd><code>conf</code> - must not be null</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>String representation of the remaining relative path</dd>
<dt><span class="throwsLabel">Throws:</span></dt>
<dd><code><a href="https://docs.oracle.com/javase/8/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></code> - from underlying filesystem</dd>
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<h4>getPath</h4>
<pre>public static&nbsp;<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>&nbsp;<a href="../../../../../src-html/org/apache/hadoop/hbase/util/CommonFSUtils.html#line.294">getPath</a>(org.apache.hadoop.fs.Path&nbsp;p)</pre>
<div class="block">Return the 'path' component of a Path. In Hadoop, Path is a URI. This
method returns the 'path' component of a Path's URI: e.g. If a Path is
<code>hdfs://example.org:9000/hbase_trunk/TestTable/compaction.dir</code>,
this method returns <code>/hbase_trunk/TestTable/compaction.dir</code>.
This method is useful if you want to print out a Path without qualifying
Filesystem instance.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>p</code> - Filesystem Path whose 'path' component we are to return.</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>Path portion of the Filesystem</dd>
</dl>
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<h4>getRootDir</h4>
<pre>public static&nbsp;org.apache.hadoop.fs.Path&nbsp;<a href="../../../../../src-html/org/apache/hadoop/hbase/util/CommonFSUtils.html#line.304">getRootDir</a>(org.apache.hadoop.conf.Configuration&nbsp;c)
throws <a href="https://docs.oracle.com/javase/8/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></pre>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>c</code> - configuration</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd><code>Path</code> to hbase root directory from
configuration as a qualified Path.</dd>
<dt><span class="throwsLabel">Throws:</span></dt>
<dd><code><a href="https://docs.oracle.com/javase/8/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></code> - e</dd>
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<h4>setRootDir</h4>
<pre>public static&nbsp;void&nbsp;<a href="../../../../../src-html/org/apache/hadoop/hbase/util/CommonFSUtils.html#line.310">setRootDir</a>(org.apache.hadoop.conf.Configuration&nbsp;c,
org.apache.hadoop.fs.Path&nbsp;root)</pre>
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<pre>public static&nbsp;void&nbsp;<a href="../../../../../src-html/org/apache/hadoop/hbase/util/CommonFSUtils.html#line.314">setFsDefault</a>(org.apache.hadoop.conf.Configuration&nbsp;c,
org.apache.hadoop.fs.Path&nbsp;root)</pre>
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<pre>public static&nbsp;void&nbsp;<a href="../../../../../src-html/org/apache/hadoop/hbase/util/CommonFSUtils.html#line.318">setFsDefault</a>(org.apache.hadoop.conf.Configuration&nbsp;c,
<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>&nbsp;uri)</pre>
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<h4>getRootDirFileSystem</h4>
<pre>public static&nbsp;org.apache.hadoop.fs.FileSystem&nbsp;<a href="../../../../../src-html/org/apache/hadoop/hbase/util/CommonFSUtils.html#line.322">getRootDirFileSystem</a>(org.apache.hadoop.conf.Configuration&nbsp;c)
throws <a href="https://docs.oracle.com/javase/8/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></pre>
<dl>
<dt><span class="throwsLabel">Throws:</span></dt>
<dd><code><a href="https://docs.oracle.com/javase/8/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></code></dd>
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<h4>getWALRootDir</h4>
<pre>public static&nbsp;org.apache.hadoop.fs.Path&nbsp;<a href="../../../../../src-html/org/apache/hadoop/hbase/util/CommonFSUtils.html#line.333">getWALRootDir</a>(org.apache.hadoop.conf.Configuration&nbsp;c)
throws <a href="https://docs.oracle.com/javase/8/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></pre>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>c</code> - configuration</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd><code>Path</code> to hbase log root directory: e.g. <a href="../../../../../org/apache/hadoop/hbase/util/CommonFSUtils.html#HBASE_WAL_DIR">"hbase.wal.dir"</a> from
configuration as a qualified Path. Defaults to HBase root dir.</dd>
<dt><span class="throwsLabel">Throws:</span></dt>
<dd><code><a href="https://docs.oracle.com/javase/8/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></code> - e</dd>
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<h4>getDirUri</h4>
<pre>public static&nbsp;<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>&nbsp;<a href="../../../../../src-html/org/apache/hadoop/hbase/util/CommonFSUtils.html#line.349">getDirUri</a>(org.apache.hadoop.conf.Configuration&nbsp;c,
org.apache.hadoop.fs.Path&nbsp;p)
throws <a href="https://docs.oracle.com/javase/8/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></pre>
<div class="block">Returns the URI in the string format</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>c</code> - configuration</dd>
<dd><code>p</code> - path</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>- the URI's to string format</dd>
<dt><span class="throwsLabel">Throws:</span></dt>
<dd><code><a href="https://docs.oracle.com/javase/8/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></code></dd>
</dl>
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<pre>public static&nbsp;void&nbsp;<a href="../../../../../src-html/org/apache/hadoop/hbase/util/CommonFSUtils.html#line.356">setWALRootDir</a>(org.apache.hadoop.conf.Configuration&nbsp;c,
org.apache.hadoop.fs.Path&nbsp;root)</pre>
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<h4>getWALFileSystem</h4>
<pre>public static&nbsp;org.apache.hadoop.fs.FileSystem&nbsp;<a href="../../../../../src-html/org/apache/hadoop/hbase/util/CommonFSUtils.html#line.360">getWALFileSystem</a>(org.apache.hadoop.conf.Configuration&nbsp;c)
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<dl>
<dt><span class="throwsLabel">Throws:</span></dt>
<dd><code><a href="https://docs.oracle.com/javase/8/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></code></dd>
</dl>
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<pre>private static&nbsp;boolean&nbsp;<a href="../../../../../src-html/org/apache/hadoop/hbase/util/CommonFSUtils.html#line.371">isValidWALRootDir</a>(org.apache.hadoop.fs.Path&nbsp;walDir,
org.apache.hadoop.conf.Configuration&nbsp;c)
throws <a href="https://docs.oracle.com/javase/8/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></pre>
<dl>
<dt><span class="throwsLabel">Throws:</span></dt>
<dd><code><a href="https://docs.oracle.com/javase/8/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></code></dd>
</dl>
</li>
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<h4>getWALRegionDir</h4>
<pre>public static&nbsp;org.apache.hadoop.fs.Path&nbsp;<a href="../../../../../src-html/org/apache/hadoop/hbase/util/CommonFSUtils.html#line.393">getWALRegionDir</a>(org.apache.hadoop.conf.Configuration&nbsp;conf,
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<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>&nbsp;encodedRegionName)
throws <a href="https://docs.oracle.com/javase/8/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></pre>
<div class="block">Returns the WAL region directory based on the given table name and region name</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>conf</code> - configuration to determine WALRootDir</dd>
<dd><code>tableName</code> - Table that the region is under</dd>
<dd><code>encodedRegionName</code> - Region name used for creating the final region directory</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>the region directory used to store WALs under the WALRootDir</dd>
<dt><span class="throwsLabel">Throws:</span></dt>
<dd><code><a href="https://docs.oracle.com/javase/8/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></code> - if there is an exception determining the WALRootDir</dd>
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<pre>public static&nbsp;org.apache.hadoop.fs.Path&nbsp;<a href="../../../../../src-html/org/apache/hadoop/hbase/util/CommonFSUtils.html#line.405">getWALTableDir</a>(org.apache.hadoop.conf.Configuration&nbsp;conf,
<a href="../../../../../org/apache/hadoop/hbase/TableName.html" title="class in org.apache.hadoop.hbase">TableName</a>&nbsp;tableName)
throws <a href="https://docs.oracle.com/javase/8/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></pre>
<div class="block">Returns the Table directory under the WALRootDir for the specified table name</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>conf</code> - configuration used to get the WALRootDir</dd>
<dd><code>tableName</code> - Table to get the directory for</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>a path to the WAL table directory for the specified table</dd>
<dt><span class="throwsLabel">Throws:</span></dt>
<dd><code><a href="https://docs.oracle.com/javase/8/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></code> - if there is an exception determining the WALRootDir</dd>
</dl>
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<pre><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Deprecated.html?is-external=true" title="class or interface in java.lang">@Deprecated</a>
public static&nbsp;org.apache.hadoop.fs.Path&nbsp;<a href="../../../../../src-html/org/apache/hadoop/hbase/util/CommonFSUtils.html#line.418">getWrongWALRegionDir</a>(org.apache.hadoop.conf.Configuration&nbsp;conf,
<a href="../../../../../org/apache/hadoop/hbase/TableName.html" title="class in org.apache.hadoop.hbase">TableName</a>&nbsp;tableName,
<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>&nbsp;encodedRegionName)
throws <a href="https://docs.oracle.com/javase/8/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></pre>
<div class="block"><span class="deprecatedLabel">Deprecated.</span>&nbsp;<span class="deprecationComment">For compatibility, will be removed in 4.0.0.</span></div>
<div class="block">For backward compatibility with HBASE-20734, where we store recovered edits in a wrong
directory without BASE_NAMESPACE_DIR. See HBASE-22617 for more details.</div>
<dl>
<dt><span class="throwsLabel">Throws:</span></dt>
<dd><code><a href="https://docs.oracle.com/javase/8/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></code></dd>
</dl>
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<h4>getTableDir</h4>
<pre>public static&nbsp;org.apache.hadoop.fs.Path&nbsp;<a href="../../../../../src-html/org/apache/hadoop/hbase/util/CommonFSUtils.html#line.433">getTableDir</a>(org.apache.hadoop.fs.Path&nbsp;rootdir,
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<div class="block">Returns the <code>Path</code> object representing the table directory under
path rootdir</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>rootdir</code> - qualified path of HBase root directory</dd>
<dd><code>tableName</code> - name of table</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd><code>Path</code> for table</dd>
</dl>
</li>
</ul>
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<pre>public static&nbsp;org.apache.hadoop.fs.Path&nbsp;<a href="../../../../../src-html/org/apache/hadoop/hbase/util/CommonFSUtils.html#line.447">getRegionDir</a>(org.apache.hadoop.fs.Path&nbsp;rootdir,
<a href="../../../../../org/apache/hadoop/hbase/TableName.html" title="class in org.apache.hadoop.hbase">TableName</a>&nbsp;tableName,
<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>&nbsp;regionName)</pre>
<div class="block">Returns the <code>Path</code> object representing the region directory under
path rootdir</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>rootdir</code> - qualified path of HBase root directory</dd>
<dd><code>tableName</code> - name of table</dd>
<dd><code>regionName</code> - The encoded region name</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd><code>Path</code> for region</dd>
</dl>
</li>
</ul>
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<h4>getTableName</h4>
<pre>public static&nbsp;<a href="../../../../../org/apache/hadoop/hbase/TableName.html" title="class in org.apache.hadoop.hbase">TableName</a>&nbsp;<a href="../../../../../src-html/org/apache/hadoop/hbase/util/CommonFSUtils.html#line.459">getTableName</a>(org.apache.hadoop.fs.Path&nbsp;tablePath)</pre>
<div class="block">Returns the <a href="../../../../../org/apache/hadoop/hbase/TableName.html" title="class in org.apache.hadoop.hbase"><code>TableName</code></a> object representing
the table directory under
path rootdir</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>tablePath</code> - path of table</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd><code>Path</code> for table</dd>
</dl>
</li>
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<h4>getNamespaceDir</h4>
<pre>public static&nbsp;org.apache.hadoop.fs.Path&nbsp;<a href="../../../../../src-html/org/apache/hadoop/hbase/util/CommonFSUtils.html#line.471">getNamespaceDir</a>(org.apache.hadoop.fs.Path&nbsp;rootdir,
<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>&nbsp;namespace)</pre>
<div class="block">Returns the <code>Path</code> object representing
the namespace directory under path rootdir</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>rootdir</code> - qualified path of HBase root directory</dd>
<dd><code>namespace</code> - namespace name</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd><code>Path</code> for table</dd>
</dl>
</li>
</ul>
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<h4>setStoragePolicy</h4>
<pre>public static&nbsp;void&nbsp;<a href="../../../../../src-html/org/apache/hadoop/hbase/util/CommonFSUtils.html#line.497">setStoragePolicy</a>(org.apache.hadoop.fs.FileSystem&nbsp;fs,
org.apache.hadoop.fs.Path&nbsp;path,
<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>&nbsp;storagePolicy)</pre>
<div class="block">Sets storage policy for given path.
If the passed path is a directory, we'll set the storage policy for all files
created in the future in said directory. Note that this change in storage
policy takes place at the FileSystem level; it will persist beyond this RS's lifecycle.
If we're running on a version of FileSystem that doesn't support the given storage policy
(or storage policies at all), then we'll issue a log message and continue.
See http://hadoop.apache.org/docs/r2.6.0/hadoop-project-dist/hadoop-hdfs/ArchivalStorage.html</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>fs</code> - We only do anything it implements a setStoragePolicy method</dd>
<dd><code>path</code> - the Path whose storage policy is to be set</dd>
<dd><code>storagePolicy</code> - Policy to set on <code>path</code>; see hadoop 2.6+
org.apache.hadoop.hdfs.protocol.HdfsConstants for possible list e.g
'COLD', 'WARM', 'HOT', 'ONE_SSD', 'ALL_SSD', 'LAZY_PERSIST'.</dd>
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<h4>setStoragePolicy</h4>
<pre>static&nbsp;void&nbsp;<a href="../../../../../src-html/org/apache/hadoop/hbase/util/CommonFSUtils.html#line.507">setStoragePolicy</a>(org.apache.hadoop.fs.FileSystem&nbsp;fs,
org.apache.hadoop.fs.Path&nbsp;path,
<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>&nbsp;storagePolicy,
boolean&nbsp;throwException)
throws <a href="https://docs.oracle.com/javase/8/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></pre>
<dl>
<dt><span class="throwsLabel">Throws:</span></dt>
<dd><code><a href="https://docs.oracle.com/javase/8/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></code></dd>
</dl>
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<a name="invokeSetStoragePolicy-org.apache.hadoop.fs.FileSystem-org.apache.hadoop.fs.Path-java.lang.String-">
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<h4>invokeSetStoragePolicy</h4>
<pre>private static&nbsp;void&nbsp;<a href="../../../../../src-html/org/apache/hadoop/hbase/util/CommonFSUtils.html#line.539">invokeSetStoragePolicy</a>(org.apache.hadoop.fs.FileSystem&nbsp;fs,
org.apache.hadoop.fs.Path&nbsp;path,
<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>&nbsp;storagePolicy)
throws <a href="https://docs.oracle.com/javase/8/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></pre>
<dl>
<dt><span class="throwsLabel">Throws:</span></dt>
<dd><code><a href="https://docs.oracle.com/javase/8/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></code></dd>
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<h4>isHDFS</h4>
<pre>public static&nbsp;boolean&nbsp;<a href="../../../../../src-html/org/apache/hadoop/hbase/util/CommonFSUtils.html#line.584">isHDFS</a>(org.apache.hadoop.conf.Configuration&nbsp;conf)
throws <a href="https://docs.oracle.com/javase/8/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></pre>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>conf</code> - must not be null</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>True if this filesystem whose scheme is 'hdfs'.</dd>
<dt><span class="throwsLabel">Throws:</span></dt>
<dd><code><a href="https://docs.oracle.com/javase/8/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></code> - from underlying FileSystem</dd>
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<h4>isRecoveredEdits</h4>
<pre>public static&nbsp;boolean&nbsp;<a href="../../../../../src-html/org/apache/hadoop/hbase/util/CommonFSUtils.html#line.595">isRecoveredEdits</a>(org.apache.hadoop.fs.Path&nbsp;path)</pre>
<div class="block">Checks if the given path is the one with 'recovered.edits' dir.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>path</code> - must not be null</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>True if we recovered edits</dd>
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<h4>getCurrentFileSystem</h4>
<pre>public static&nbsp;org.apache.hadoop.fs.FileSystem&nbsp;<a href="../../../../../src-html/org/apache/hadoop/hbase/util/CommonFSUtils.html#line.604">getCurrentFileSystem</a>(org.apache.hadoop.conf.Configuration&nbsp;conf)
throws <a href="https://docs.oracle.com/javase/8/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></pre>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>conf</code> - must not be null</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>Returns the filesystem of the hbase rootdir.</dd>
<dt><span class="throwsLabel">Throws:</span></dt>
<dd><code><a href="https://docs.oracle.com/javase/8/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></code> - from underlying FileSystem</dd>
</dl>
</li>
</ul>
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<h4>listStatus</h4>
<pre>public static&nbsp;org.apache.hadoop.fs.FileStatus[]&nbsp;<a href="../../../../../src-html/org/apache/hadoop/hbase/util/CommonFSUtils.html#line.622">listStatus</a>(org.apache.hadoop.fs.FileSystem&nbsp;fs,
org.apache.hadoop.fs.Path&nbsp;dir,
org.apache.hadoop.fs.PathFilter&nbsp;filter)
throws <a href="https://docs.oracle.com/javase/8/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></pre>
<div class="block">Calls fs.listStatus() and treats FileNotFoundException as non-fatal
This accommodates differences between hadoop versions, where hadoop 1
does not throw a FileNotFoundException, and return an empty FileStatus[]
while Hadoop 2 will throw FileNotFoundException.
Where possible, prefer FSUtils#listStatusWithStatusFilter(FileSystem,
Path, FileStatusFilter) instead.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>fs</code> - file system</dd>
<dd><code>dir</code> - directory</dd>
<dd><code>filter</code> - path filter</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>null if dir is empty or doesn't exist, otherwise FileStatus array</dd>
<dt><span class="throwsLabel">Throws:</span></dt>
<dd><code><a href="https://docs.oracle.com/javase/8/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></code></dd>
</dl>
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<h4>listStatus</h4>
<pre>public static&nbsp;org.apache.hadoop.fs.FileStatus[]&nbsp;<a href="../../../../../src-html/org/apache/hadoop/hbase/util/CommonFSUtils.html#line.647">listStatus</a>(org.apache.hadoop.fs.FileSystem&nbsp;fs,
org.apache.hadoop.fs.Path&nbsp;dir)
throws <a href="https://docs.oracle.com/javase/8/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></pre>
<div class="block">Calls fs.listStatus() and treats FileNotFoundException as non-fatal
This would accommodates differences between hadoop versions</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>fs</code> - file system</dd>
<dd><code>dir</code> - directory</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>null if dir is empty or doesn't exist, otherwise FileStatus array</dd>
<dt><span class="throwsLabel">Throws:</span></dt>
<dd><code><a href="https://docs.oracle.com/javase/8/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></code></dd>
</dl>
</li>
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<h4>listLocatedStatus</h4>
<pre>public static&nbsp;<a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a>&lt;org.apache.hadoop.fs.LocatedFileStatus&gt;&nbsp;<a href="../../../../../src-html/org/apache/hadoop/hbase/util/CommonFSUtils.html#line.658">listLocatedStatus</a>(org.apache.hadoop.fs.FileSystem&nbsp;fs,
org.apache.hadoop.fs.Path&nbsp;dir)
throws <a href="https://docs.oracle.com/javase/8/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></pre>
<div class="block">Calls fs.listFiles() to get FileStatus and BlockLocations together for reducing rpc call</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>fs</code> - file system</dd>
<dd><code>dir</code> - directory</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>LocatedFileStatus list</dd>
<dt><span class="throwsLabel">Throws:</span></dt>
<dd><code><a href="https://docs.oracle.com/javase/8/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></code></dd>
</dl>
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<h4>delete</h4>
<pre>public static&nbsp;boolean&nbsp;<a href="../../../../../src-html/org/apache/hadoop/hbase/util/CommonFSUtils.html#line.688">delete</a>(org.apache.hadoop.fs.FileSystem&nbsp;fs,
org.apache.hadoop.fs.Path&nbsp;path,
boolean&nbsp;recursive)
throws <a href="https://docs.oracle.com/javase/8/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></pre>
<div class="block">Calls fs.delete() and returns the value returned by the fs.delete()</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>fs</code> - must not be null</dd>
<dd><code>path</code> - must not be null</dd>
<dd><code>recursive</code> - delete tree rooted at path</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>the value returned by the fs.delete()</dd>
<dt><span class="throwsLabel">Throws:</span></dt>
<dd><code><a href="https://docs.oracle.com/javase/8/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></code> - from underlying FileSystem</dd>
</dl>
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<h4>isExists</h4>
<pre>public static&nbsp;boolean&nbsp;<a href="../../../../../src-html/org/apache/hadoop/hbase/util/CommonFSUtils.html#line.701">isExists</a>(org.apache.hadoop.fs.FileSystem&nbsp;fs,
org.apache.hadoop.fs.Path&nbsp;path)
throws <a href="https://docs.oracle.com/javase/8/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></pre>
<div class="block">Calls fs.exists(). Checks if the specified path exists</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>fs</code> - must not be null</dd>
<dd><code>path</code> - must not be null</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>the value returned by fs.exists()</dd>
<dt><span class="throwsLabel">Throws:</span></dt>
<dd><code><a href="https://docs.oracle.com/javase/8/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></code> - from underlying FileSystem</dd>
</dl>
</li>
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<h4>logFileSystemState</h4>
<pre>public static&nbsp;void&nbsp;<a href="../../../../../src-html/org/apache/hadoop/hbase/util/CommonFSUtils.html#line.712">logFileSystemState</a>(org.apache.hadoop.fs.FileSystem&nbsp;fs,
org.apache.hadoop.fs.Path&nbsp;root,
org.slf4j.Logger&nbsp;log)
throws <a href="https://docs.oracle.com/javase/8/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></pre>
<div class="block">Log the current state of the filesystem from a certain root directory</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>fs</code> - filesystem to investigate</dd>
<dd><code>root</code> - root file/directory to start logging from</dd>
<dd><code>log</code> - log to output information</dd>
<dt><span class="throwsLabel">Throws:</span></dt>
<dd><code><a href="https://docs.oracle.com/javase/8/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></code> - if an unexpected exception occurs</dd>
</dl>
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<h4>logFSTree</h4>
<pre>private static&nbsp;void&nbsp;<a href="../../../../../src-html/org/apache/hadoop/hbase/util/CommonFSUtils.html#line.723">logFSTree</a>(org.slf4j.Logger&nbsp;log,
org.apache.hadoop.fs.FileSystem&nbsp;fs,
org.apache.hadoop.fs.Path&nbsp;root,
<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>&nbsp;prefix)
throws <a href="https://docs.oracle.com/javase/8/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></pre>
<div class="block">Recursive helper to log the state of the FS</div>
<dl>
<dt><span class="throwsLabel">Throws:</span></dt>
<dd><code><a href="https://docs.oracle.com/javase/8/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></code></dd>
<dt><span class="seeLabel">See Also:</span></dt>
<dd><a href="../../../../../org/apache/hadoop/hbase/util/CommonFSUtils.html#logFileSystemState-org.apache.hadoop.fs.FileSystem-org.apache.hadoop.fs.Path-org.slf4j.Logger-"><code>logFileSystemState(FileSystem, Path, Logger)</code></a></dd>
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<h4>renameAndSetModifyTime</h4>
<pre>public static&nbsp;boolean&nbsp;<a href="../../../../../src-html/org/apache/hadoop/hbase/util/CommonFSUtils.html#line.740">renameAndSetModifyTime</a>(org.apache.hadoop.fs.FileSystem&nbsp;fs,
org.apache.hadoop.fs.Path&nbsp;src,
org.apache.hadoop.fs.Path&nbsp;dest)
throws <a href="https://docs.oracle.com/javase/8/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></pre>
<dl>
<dt><span class="throwsLabel">Throws:</span></dt>
<dd><code><a href="https://docs.oracle.com/javase/8/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></code></dd>
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<h4>checkShortCircuitReadBufferSize</h4>
<pre>public static&nbsp;void&nbsp;<a href="../../../../../src-html/org/apache/hadoop/hbase/util/CommonFSUtils.html#line.751">checkShortCircuitReadBufferSize</a>(org.apache.hadoop.conf.Configuration&nbsp;conf)</pre>
<div class="block">Check if short circuit read buffer size is set and if not, set it to hbase value.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>conf</code> - must not be null</dd>
</dl>
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