content/docs/r3.3.1/api/org/apache/hadoop/yarn/logaggregation/filecontroller/LogAggregationFileController.html - hadoop-site - Git at Google

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 <div class="subTitle">org.apache.hadoop.yarn.logaggregation.filecontroller</div>
 <h2 title="Class LogAggregationFileController" class="title">Class LogAggregationFileController</h2>
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 <ul class="inheritance">
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 <pre>@InterfaceAudience.Public
  @InterfaceStability.Unstable
 public abstract class <span class="typeNameLabel">LogAggregationFileController</span>
 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">Base class to implement Log Aggregation File Controller.</div>
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 <h3>Field Summary</h3>
 <table class="memberSummary" border="0" cellpadding="3" cellspacing="0" summary="Field Summary table, listing fields, and an explanation">
 <caption><span>Fields</span><span class="tabEnd">&nbsp;</span></caption>
 <tr>
 <th class="colFirst" scope="col">Modifier and Type</th>
 <th class="colLast" scope="col">Field and Description</th>
 </tr>
 <tr class="altColor">
 <td class="colFirst"><code>protected static <a href="../../../../../../org/apache/hadoop/fs/permission/FsPermission.html" title="class in org.apache.hadoop.fs.permission">FsPermission</a></code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/yarn/logaggregation/filecontroller/LogAggregationFileController.html#APP_DIR_PERMISSIONS">APP_DIR_PERMISSIONS</a></span></code>
 <div class="block">Permissions for the Application directory.</div>
 </td>
 </tr>
 <tr class="rowColor">
 <td class="colFirst"><code>protected static <a href="../../../../../../org/apache/hadoop/fs/permission/FsPermission.html" title="class in org.apache.hadoop.fs.permission">FsPermission</a></code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/yarn/logaggregation/filecontroller/LogAggregationFileController.html#APP_LOG_FILE_UMASK">APP_LOG_FILE_UMASK</a></span></code>
 <div class="block">Umask for the log file.</div>
 </td>
 </tr>
 <tr class="altColor">
 <td class="colFirst"><code>protected <a href="../../../../../../org/apache/hadoop/conf/Configuration.html" title="class in org.apache.hadoop.conf">Configuration</a></code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/yarn/logaggregation/filecontroller/LogAggregationFileController.html#conf">conf</a></span></code>&nbsp;</td>
 </tr>
 <tr class="rowColor">
 <td class="colFirst"><code>protected <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/yarn/logaggregation/filecontroller/LogAggregationFileController.html#fileControllerName">fileControllerName</a></span></code>&nbsp;</td>
 </tr>
 <tr class="altColor">
 <td class="colFirst"><code>protected boolean</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/yarn/logaggregation/filecontroller/LogAggregationFileController.html#fsSupportsChmod">fsSupportsChmod</a></span></code>&nbsp;</td>
 </tr>
 <tr class="rowColor">
 <td class="colFirst"><code>protected <a href="../../../../../../org/apache/hadoop/fs/Path.html" title="class in org.apache.hadoop.fs">Path</a></code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/yarn/logaggregation/filecontroller/LogAggregationFileController.html#remoteRootLogDir">remoteRootLogDir</a></span></code>&nbsp;</td>
 </tr>
 <tr class="altColor">
 <td class="colFirst"><code>protected <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/yarn/logaggregation/filecontroller/LogAggregationFileController.html#remoteRootLogDirSuffix">remoteRootLogDirSuffix</a></span></code>&nbsp;</td>
 </tr>
 <tr class="rowColor">
 <td class="colFirst"><code>protected int</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/yarn/logaggregation/filecontroller/LogAggregationFileController.html#retentionSize">retentionSize</a></span></code>&nbsp;</td>
 </tr>
 <tr class="altColor">
 <td class="colFirst"><code>protected static <a href="../../../../../../org/apache/hadoop/fs/permission/FsPermission.html" title="class in org.apache.hadoop.fs.permission">FsPermission</a></code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/yarn/logaggregation/filecontroller/LogAggregationFileController.html#TLDIR_PERMISSIONS">TLDIR_PERMISSIONS</a></span></code>
 <div class="block">Permissions for the top level directory under which app directories will be
  created.</div>
 </td>
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 <th class="colOne" scope="col">Constructor and Description</th>
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 <tr class="altColor">
 <td class="colOne"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/yarn/logaggregation/filecontroller/LogAggregationFileController.html#LogAggregationFileController--">LogAggregationFileController</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="t2" class="tableTab"><span><a href="javascript:show(2);">Instance Methods</a></span><span class="tabEnd">&nbsp;</span></span><span id="t3" class="tableTab"><span><a href="javascript:show(4);">Abstract 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></caption>
 <tr>
 <th class="colFirst" scope="col">Modifier and Type</th>
 <th class="colLast" scope="col">Method and Description</th>
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 <tr id="i0" class="altColor">
 <td class="colFirst"><code>protected <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/yarn/logaggregation/filecontroller/LogAggregationFileController.html#aggregatedLogSuffix-java.lang.String-">aggregatedLogSuffix</a></span>(<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;fileName)</code>
 <div class="block">Create the aggregated log suffix.</div>
 </td>
 </tr>
 <tr id="i1" class="rowColor">
 <td class="colFirst"><code>protected boolean</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/yarn/logaggregation/filecontroller/LogAggregationFileController.html#belongsToAppAttempt-org.apache.hadoop.yarn.api.records.ApplicationAttemptId-java.lang.String-">belongsToAppAttempt</a></span>(<a href="../../../../../../org/apache/hadoop/yarn/api/records/ApplicationAttemptId.html" title="class in org.apache.hadoop.yarn.api.records">ApplicationAttemptId</a>&nbsp;appAttemptId,
                    <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;containerIdStr)</code>&nbsp;</td>
 </tr>
 <tr id="i2" class="altColor">
 <td class="colFirst"><code>protected boolean</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/yarn/logaggregation/filecontroller/LogAggregationFileController.html#checkExists-org.apache.hadoop.fs.FileSystem-org.apache.hadoop.fs.Path-org.apache.hadoop.fs.permission.FsPermission-">checkExists</a></span>(<a href="../../../../../../org/apache/hadoop/fs/FileSystem.html" title="class in org.apache.hadoop.fs">FileSystem</a>&nbsp;fs,
            <a href="../../../../../../org/apache/hadoop/fs/Path.html" title="class in org.apache.hadoop.fs">Path</a>&nbsp;path,
            <a href="../../../../../../org/apache/hadoop/fs/permission/FsPermission.html" title="class in org.apache.hadoop.fs.permission">FsPermission</a>&nbsp;fsPerm)</code>&nbsp;</td>
 </tr>
 <tr id="i3" class="rowColor">
 <td class="colFirst"><code>protected void</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/yarn/logaggregation/filecontroller/LogAggregationFileController.html#cleanOldLogs-org.apache.hadoop.fs.Path-org.apache.hadoop.yarn.api.records.NodeId-org.apache.hadoop.security.UserGroupInformation-">cleanOldLogs</a></span>(<a href="../../../../../../org/apache/hadoop/fs/Path.html" title="class in org.apache.hadoop.fs">Path</a>&nbsp;remoteNodeLogFileForApp,
             <a href="../../../../../../org/apache/hadoop/yarn/api/records/NodeId.html" title="class in org.apache.hadoop.yarn.api.records">NodeId</a>&nbsp;nodeId,
             <a href="../../../../../../org/apache/hadoop/security/UserGroupInformation.html" title="class in org.apache.hadoop.security">UserGroupInformation</a>&nbsp;userUgi)</code>&nbsp;</td>
 </tr>
 <tr id="i4" class="altColor">
 <td class="colFirst"><code>protected void</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/yarn/logaggregation/filecontroller/LogAggregationFileController.html#closePrintStream-java.io.OutputStream-">closePrintStream</a></span>(<a href="https://docs.oracle.com/javase/8/docs/api/java/io/OutputStream.html?is-external=true" title="class or interface in java.io">OutputStream</a>&nbsp;out)</code>&nbsp;</td>
 </tr>
 <tr id="i5" class="rowColor">
 <td class="colFirst"><code>abstract void</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/yarn/logaggregation/filecontroller/LogAggregationFileController.html#closeWriter--">closeWriter</a></span>()</code>
 <div class="block">Close the writer.</div>
 </td>
 </tr>
 <tr id="i6" class="altColor">
 <td class="colFirst"><code>void</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/yarn/logaggregation/filecontroller/LogAggregationFileController.html#createAppDir-java.lang.String-org.apache.hadoop.yarn.api.records.ApplicationId-org.apache.hadoop.security.UserGroupInformation-">createAppDir</a></span>(<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;user,
             <a href="../../../../../../org/apache/hadoop/yarn/api/records/ApplicationId.html" title="class in org.apache.hadoop.yarn.api.records">ApplicationId</a>&nbsp;appId,
             <a href="../../../../../../org/apache/hadoop/security/UserGroupInformation.html" title="class in org.apache.hadoop.security">UserGroupInformation</a>&nbsp;userUgi)</code>
 <div class="block">Create remote Application directory for log aggregation.</div>
 </td>
 </tr>
 <tr id="i7" class="rowColor">
 <td class="colFirst"><code>protected void</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/yarn/logaggregation/filecontroller/LogAggregationFileController.html#createDir-org.apache.hadoop.fs.FileSystem-org.apache.hadoop.fs.Path-org.apache.hadoop.fs.permission.FsPermission-">createDir</a></span>(<a href="../../../../../../org/apache/hadoop/fs/FileSystem.html" title="class in org.apache.hadoop.fs">FileSystem</a>&nbsp;fs,
          <a href="../../../../../../org/apache/hadoop/fs/Path.html" title="class in org.apache.hadoop.fs">Path</a>&nbsp;path,
          <a href="../../../../../../org/apache/hadoop/fs/permission/FsPermission.html" title="class in org.apache.hadoop.fs.permission">FsPermission</a>&nbsp;fsPerm)</code>&nbsp;</td>
 </tr>
 <tr id="i8" class="altColor">
 <td class="colFirst"><code>abstract <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;<a href="../../../../../../org/apache/hadoop/yarn/api/records/ApplicationAccessType.html" title="enum in org.apache.hadoop.yarn.api.records">ApplicationAccessType</a>,<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>&gt;</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/yarn/logaggregation/filecontroller/LogAggregationFileController.html#getApplicationAcls-org.apache.hadoop.fs.Path-org.apache.hadoop.yarn.api.records.ApplicationId-">getApplicationAcls</a></span>(<a href="../../../../../../org/apache/hadoop/fs/Path.html" title="class in org.apache.hadoop.fs">Path</a>&nbsp;aggregatedLogPath,
                   <a href="../../../../../../org/apache/hadoop/yarn/api/records/ApplicationId.html" title="class in org.apache.hadoop.yarn.api.records">ApplicationId</a>&nbsp;appId)</code>
 <div class="block">Returns ACLs for the application.</div>
 </td>
 </tr>
 <tr id="i9" class="rowColor">
 <td class="colFirst"><code>abstract <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/yarn/logaggregation/filecontroller/LogAggregationFileController.html#getApplicationOwner-org.apache.hadoop.fs.Path-org.apache.hadoop.yarn.api.records.ApplicationId-">getApplicationOwner</a></span>(<a href="../../../../../../org/apache/hadoop/fs/Path.html" title="class in org.apache.hadoop.fs">Path</a>&nbsp;aggregatedLogPath,
                    <a href="../../../../../../org/apache/hadoop/yarn/api/records/ApplicationId.html" title="class in org.apache.hadoop.yarn.api.records">ApplicationId</a>&nbsp;appId)</code>
 <div class="block">Returns the owner of the application.</div>
 </td>
 </tr>
 <tr id="i10" class="altColor">
 <td class="colFirst"><code>protected <a href="../../../../../../org/apache/hadoop/fs/FileSystem.html" title="class in org.apache.hadoop.fs">FileSystem</a></code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/yarn/logaggregation/filecontroller/LogAggregationFileController.html#getFileSystem-org.apache.hadoop.conf.Configuration-">getFileSystem</a></span>(<a href="../../../../../../org/apache/hadoop/conf/Configuration.html" title="class in org.apache.hadoop.conf">Configuration</a>&nbsp;conf)</code>&nbsp;</td>
 </tr>
 <tr id="i11" class="rowColor">
 <td class="colFirst"><code><a href="../../../../../../org/apache/hadoop/fs/Path.html" title="class in org.apache.hadoop.fs">Path</a></code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/yarn/logaggregation/filecontroller/LogAggregationFileController.html#getOlderRemoteAppLogDir-org.apache.hadoop.yarn.api.records.ApplicationId-java.lang.String-">getOlderRemoteAppLogDir</a></span>(<a href="../../../../../../org/apache/hadoop/yarn/api/records/ApplicationId.html" title="class in org.apache.hadoop.yarn.api.records">ApplicationId</a>&nbsp;appId,
                        <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;appOwner)</code>
 <div class="block">Get the older remote application directory for log aggregation.</div>
 </td>
 </tr>
 <tr id="i12" class="altColor">
 <td class="colFirst"><code><a href="../../../../../../org/apache/hadoop/fs/Path.html" title="class in org.apache.hadoop.fs">Path</a></code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/yarn/logaggregation/filecontroller/LogAggregationFileController.html#getRemoteAppLogDir-org.apache.hadoop.yarn.api.records.ApplicationId-java.lang.String-">getRemoteAppLogDir</a></span>(<a href="../../../../../../org/apache/hadoop/yarn/api/records/ApplicationId.html" title="class in org.apache.hadoop.yarn.api.records">ApplicationId</a>&nbsp;appId,
                   <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;appOwner)</code>
 <div class="block">Get the remote application directory for log aggregation.</div>
 </td>
 </tr>
 <tr id="i13" class="rowColor">
 <td class="colFirst"><code><a href="../../../../../../org/apache/hadoop/fs/Path.html" title="class in org.apache.hadoop.fs">Path</a></code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/yarn/logaggregation/filecontroller/LogAggregationFileController.html#getRemoteNodeLogFileForApp-org.apache.hadoop.yarn.api.records.ApplicationId-java.lang.String-org.apache.hadoop.yarn.api.records.NodeId-">getRemoteNodeLogFileForApp</a></span>(<a href="../../../../../../org/apache/hadoop/yarn/api/records/ApplicationId.html" title="class in org.apache.hadoop.yarn.api.records">ApplicationId</a>&nbsp;appId,
                           <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;user,
                           <a href="../../../../../../org/apache/hadoop/yarn/api/records/NodeId.html" title="class in org.apache.hadoop.yarn.api.records">NodeId</a>&nbsp;nodeId)</code>
 <div class="block">Get the remote aggregated log path.</div>
 </td>
 </tr>
 <tr id="i14" class="altColor">
 <td class="colFirst"><code><a href="../../../../../../org/apache/hadoop/fs/Path.html" title="class in org.apache.hadoop.fs">Path</a></code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/yarn/logaggregation/filecontroller/LogAggregationFileController.html#getRemoteRootLogDir--">getRemoteRootLogDir</a></span>()</code>
 <div class="block">Get the remote root log directory.</div>
 </td>
 </tr>
 <tr id="i15" class="rowColor">
 <td class="colFirst"><code><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/yarn/logaggregation/filecontroller/LogAggregationFileController.html#getRemoteRootLogDirSuffix--">getRemoteRootLogDirSuffix</a></span>()</code>
 <div class="block">Get the log aggregation directory suffix.</div>
 </td>
 </tr>
 <tr id="i16" class="altColor">
 <td class="colFirst"><code>void</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/yarn/logaggregation/filecontroller/LogAggregationFileController.html#initialize-org.apache.hadoop.conf.Configuration-java.lang.String-">initialize</a></span>(<a href="../../../../../../org/apache/hadoop/conf/Configuration.html" title="class in org.apache.hadoop.conf">Configuration</a>&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;controllerName)</code>
 <div class="block">Initialize the log file controller.</div>
 </td>
 </tr>
 <tr id="i17" class="rowColor">
 <td class="colFirst"><code>abstract void</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/yarn/logaggregation/filecontroller/LogAggregationFileController.html#initializeWriter-org.apache.hadoop.yarn.logaggregation.filecontroller.LogAggregationFileControllerContext-">initializeWriter</a></span>(org.apache.hadoop.yarn.logaggregation.filecontroller.LogAggregationFileControllerContext&nbsp;context)</code>
 <div class="block">Initialize the writer.</div>
 </td>
 </tr>
 <tr id="i18" class="altColor">
 <td class="colFirst"><code>protected abstract void</code></td>
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 <td class="colFirst"><code>boolean</code></td>
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 <td class="colFirst"><code>abstract void</code></td>
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 <div class="block">Operations needed after write the log content.</div>
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 <tr id="i21" class="rowColor">
 <td class="colFirst"><code>abstract boolean</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/yarn/logaggregation/filecontroller/LogAggregationFileController.html#readAggregatedLogs-org.apache.hadoop.yarn.logaggregation.ContainerLogsRequest-java.io.OutputStream-">readAggregatedLogs</a></span>(org.apache.hadoop.yarn.logaggregation.ContainerLogsRequest&nbsp;logRequest,
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 <div class="block">Output container log.</div>
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 <td class="colFirst"><code>abstract <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.yarn.logaggregation.ContainerLogMeta&gt;</code></td>
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 <div class="block">Return a list of <code>ContainerLogMeta</code> for an application
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 <td class="colFirst"><code>abstract void</code></td>
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 <div class="block">Render Aggregated Logs block.</div>
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 <td class="colFirst"><code>void</code></td>
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 <div class="block">Verify and create the remote log directory.</div>
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 <td class="colFirst"><code>abstract void</code></td>
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 <div class="block">Write the log content.</div>
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 <div class="block">Permissions for the top level directory under which app directories will be
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 <div class="block">Permissions for the Application directory.</div>
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 <div class="block">Initialize the log file controller.</div>
 <dl>
 <dt><span class="paramLabel">Parameters:</span></dt>
 <dd><code>conf</code> - the Configuration</dd>
 <dd><code>controllerName</code> - the log controller class name</dd>
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 <div class="block">Derived classes initialize themselves using this method.</div>
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 <pre>public&nbsp;<a href="../../../../../../org/apache/hadoop/fs/Path.html" title="class in org.apache.hadoop.fs">Path</a>&nbsp;getRemoteRootLogDir()</pre>
 <div class="block">Get the remote root log directory.</div>
 <dl>
 <dt><span class="returnLabel">Returns:</span></dt>
 <dd>the remote root log directory path</dd>
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 <div class="block">Get the log aggregation directory suffix.</div>
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 <dt><span class="returnLabel">Returns:</span></dt>
 <dd>the log aggregation directory suffix</dd>
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 <div class="block">Initialize the writer.</div>
 <dl>
 <dt><span class="paramLabel">Parameters:</span></dt>
 <dd><code>context</code> - the <code>LogAggregationFileControllerContext</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> - if fails to initialize the writer</dd>
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 <pre>public abstract&nbsp;void&nbsp;closeWriter()
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 <div class="block">Close the writer.</div>
 <dl>
 <dt><span class="throwsLabel">Throws:</span></dt>
 <dd><code>org.apache.hadoop.yarn.logaggregation.filecontroller.LogAggregationDFSException</code> - if the closing of the writer fails
          (for example due to HDFS quota being exceeded)</dd>
 </dl>
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                            org.apache.hadoop.yarn.logaggregation.AggregatedLogFormat.LogValue&nbsp;logValue)
                     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">Write the log content.</div>
 <dl>
 <dt><span class="paramLabel">Parameters:</span></dt>
 <dd><code>logKey</code> - the log key</dd>
 <dd><code>logValue</code> - the log content</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 fails to write the logs</dd>
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 <div class="block">Operations needed after write the log content.</div>
 <dl>
 <dt><span class="paramLabel">Parameters:</span></dt>
 <dd><code>record</code> - the <code>LogAggregationFileControllerContext</code></dd>
 <dt><span class="throwsLabel">Throws:</span></dt>
 <dd><code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Exception.html?is-external=true" title="class or interface in java.lang">Exception</a></code> - if anything fails</dd>
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                                     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">Output container log.</div>
 <dl>
 <dt><span class="paramLabel">Parameters:</span></dt>
 <dd><code>logRequest</code> - <code>ContainerLogsRequest</code></dd>
 <dd><code>os</code> - the output stream</dd>
 <dt><span class="returnLabel">Returns:</span></dt>
 <dd>true if we can read the aggregated logs successfully</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 we can not access the log file.</dd>
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 <pre>public abstract&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.yarn.logaggregation.ContainerLogMeta&gt;&nbsp;readAggregatedLogsMeta(org.apache.hadoop.yarn.logaggregation.ContainerLogsRequest&nbsp;logRequest)
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 <div class="block">Return a list of <code>ContainerLogMeta</code> for an application
  from Remote FileSystem.</div>
 <dl>
 <dt><span class="paramLabel">Parameters:</span></dt>
 <dd><code>logRequest</code> - <code>ContainerLogsRequest</code></dd>
 <dt><span class="returnLabel">Returns:</span></dt>
 <dd>a list of <code>ContainerLogMeta</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> - if there is no available log file</dd>
 </dl>
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 <a name="renderAggregatedLogsBlock-org.apache.hadoop.yarn.webapp.view.HtmlBlock.Block-org.apache.hadoop.yarn.webapp.View.ViewContext-">
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 <pre>public abstract&nbsp;void&nbsp;renderAggregatedLogsBlock(org.apache.hadoop.yarn.webapp.view.HtmlBlock.Block&nbsp;html,
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 <div class="block">Render Aggregated Logs block.</div>
 <dl>
 <dt><span class="paramLabel">Parameters:</span></dt>
 <dd><code>html</code> - the html</dd>
 <dd><code>context</code> - the ViewContext</dd>
 </dl>
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 <pre>public abstract&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;getApplicationOwner(<a href="../../../../../../org/apache/hadoop/fs/Path.html" title="class in org.apache.hadoop.fs">Path</a>&nbsp;aggregatedLogPath,
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 <div class="block">Returns the owner of the application.</div>
 <dl>
 <dt><span class="paramLabel">Parameters:</span></dt>
 <dd><code>aggregatedLogPath</code> - the aggregatedLog path</dd>
 <dd><code>appId</code> - the ApplicationId</dd>
 <dt><span class="returnLabel">Returns:</span></dt>
 <dd>the application owner</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 we can not get the application owner</dd>
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 <div class="block">Returns ACLs for the application. An empty map is returned if no ACLs are
  found.</div>
 <dl>
 <dt><span class="paramLabel">Parameters:</span></dt>
 <dd><code>aggregatedLogPath</code> - the aggregatedLog path.</dd>
 <dd><code>appId</code> - the ApplicationId</dd>
 <dt><span class="returnLabel">Returns:</span></dt>
 <dd>a map of the Application ACLs.</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 we can not get the application acls</dd>
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 <h4>verifyAndCreateRemoteLogDir</h4>
 <pre>public&nbsp;void&nbsp;verifyAndCreateRemoteLogDir()</pre>
 <div class="block">Verify and create the remote log directory.</div>
 </li>
 </ul>
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 <h4>createAppDir</h4>
 <pre>public&nbsp;void&nbsp;createAppDir(<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;user,
                          <a href="../../../../../../org/apache/hadoop/yarn/api/records/ApplicationId.html" title="class in org.apache.hadoop.yarn.api.records">ApplicationId</a>&nbsp;appId,
                          <a href="../../../../../../org/apache/hadoop/security/UserGroupInformation.html" title="class in org.apache.hadoop.security">UserGroupInformation</a>&nbsp;userUgi)</pre>
 <div class="block">Create remote Application directory for log aggregation.</div>
 <dl>
 <dt><span class="paramLabel">Parameters:</span></dt>
 <dd><code>user</code> - the user</dd>
 <dd><code>appId</code> - the application ID</dd>
 <dd><code>userUgi</code> - the UGI</dd>
 </dl>
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 <h4>getFileSystem</h4>
 <pre>protected&nbsp;<a href="../../../../../../org/apache/hadoop/fs/FileSystem.html" title="class in org.apache.hadoop.fs">FileSystem</a>&nbsp;getFileSystem(<a href="../../../../../../org/apache/hadoop/conf/Configuration.html" title="class in org.apache.hadoop.conf">Configuration</a>&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="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>createDir</h4>
 <pre>protected&nbsp;void&nbsp;createDir(<a href="../../../../../../org/apache/hadoop/fs/FileSystem.html" title="class in org.apache.hadoop.fs">FileSystem</a>&nbsp;fs,
                          <a href="../../../../../../org/apache/hadoop/fs/Path.html" title="class in org.apache.hadoop.fs">Path</a>&nbsp;path,
                          <a href="../../../../../../org/apache/hadoop/fs/permission/FsPermission.html" title="class in org.apache.hadoop.fs.permission">FsPermission</a>&nbsp;fsPerm)
                   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>checkExists</h4>
 <pre>protected&nbsp;boolean&nbsp;checkExists(<a href="../../../../../../org/apache/hadoop/fs/FileSystem.html" title="class in org.apache.hadoop.fs">FileSystem</a>&nbsp;fs,
                               <a href="../../../../../../org/apache/hadoop/fs/Path.html" title="class in org.apache.hadoop.fs">Path</a>&nbsp;path,
                               <a href="../../../../../../org/apache/hadoop/fs/permission/FsPermission.html" title="class in org.apache.hadoop.fs.permission">FsPermission</a>&nbsp;fsPerm)
                        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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 <h4>getRemoteNodeLogFileForApp</h4>
 <pre>public&nbsp;<a href="../../../../../../org/apache/hadoop/fs/Path.html" title="class in org.apache.hadoop.fs">Path</a>&nbsp;getRemoteNodeLogFileForApp(<a href="../../../../../../org/apache/hadoop/yarn/api/records/ApplicationId.html" title="class in org.apache.hadoop.yarn.api.records">ApplicationId</a>&nbsp;appId,
                                        <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;user,
                                        <a href="../../../../../../org/apache/hadoop/yarn/api/records/NodeId.html" title="class in org.apache.hadoop.yarn.api.records">NodeId</a>&nbsp;nodeId)</pre>
 <div class="block">Get the remote aggregated log path.</div>
 <dl>
 <dt><span class="paramLabel">Parameters:</span></dt>
 <dd><code>appId</code> - the ApplicationId</dd>
 <dd><code>user</code> - the Application Owner</dd>
 <dd><code>nodeId</code> - the NodeManager Id</dd>
 <dt><span class="returnLabel">Returns:</span></dt>
 <dd>the remote aggregated log path</dd>
 </dl>
 </li>
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 <h4>getRemoteAppLogDir</h4>
 <pre>public&nbsp;<a href="../../../../../../org/apache/hadoop/fs/Path.html" title="class in org.apache.hadoop.fs">Path</a>&nbsp;getRemoteAppLogDir(<a href="../../../../../../org/apache/hadoop/yarn/api/records/ApplicationId.html" title="class in org.apache.hadoop.yarn.api.records">ApplicationId</a>&nbsp;appId,
                                <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;appOwner)
                         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">Get the remote application directory for log aggregation.</div>
 <dl>
 <dt><span class="paramLabel">Parameters:</span></dt>
 <dd><code>appId</code> - the Application ID</dd>
 <dd><code>appOwner</code> - the Application Owner</dd>
 <dt><span class="returnLabel">Returns:</span></dt>
 <dd>the remote application directory</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 can not find the remote application directory</dd>
 </dl>
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 <h4>getOlderRemoteAppLogDir</h4>
 <pre>public&nbsp;<a href="../../../../../../org/apache/hadoop/fs/Path.html" title="class in org.apache.hadoop.fs">Path</a>&nbsp;getOlderRemoteAppLogDir(<a href="../../../../../../org/apache/hadoop/yarn/api/records/ApplicationId.html" title="class in org.apache.hadoop.yarn.api.records">ApplicationId</a>&nbsp;appId,
                                     <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;appOwner)
                              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">Get the older remote application directory for log aggregation.</div>
 <dl>
 <dt><span class="paramLabel">Parameters:</span></dt>
 <dd><code>appId</code> - the Application ID</dd>
 <dd><code>appOwner</code> - the Application Owner</dd>
 <dt><span class="returnLabel">Returns:</span></dt>
 <dd>the older remote application directory</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 can not find the remote application directory</dd>
 </dl>
 </li>
 </ul>
 <a name="cleanOldLogs-org.apache.hadoop.fs.Path-org.apache.hadoop.yarn.api.records.NodeId-org.apache.hadoop.security.UserGroupInformation-">
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 <h4>cleanOldLogs</h4>
 <pre>protected&nbsp;void&nbsp;cleanOldLogs(<a href="../../../../../../org/apache/hadoop/fs/Path.html" title="class in org.apache.hadoop.fs">Path</a>&nbsp;remoteNodeLogFileForApp,
                             <a href="../../../../../../org/apache/hadoop/yarn/api/records/NodeId.html" title="class in org.apache.hadoop.yarn.api.records">NodeId</a>&nbsp;nodeId,
                             <a href="../../../../../../org/apache/hadoop/security/UserGroupInformation.html" title="class in org.apache.hadoop.security">UserGroupInformation</a>&nbsp;userUgi)</pre>
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 <h4>aggregatedLogSuffix</h4>
 <pre>protected&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;aggregatedLogSuffix(<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;fileName)</pre>
 <div class="block">Create the aggregated log suffix. The LogAggregationFileController
  should call this to get the suffix and append the suffix to the end
  of each log. This would keep the aggregated log format consistent.</div>
 <dl>
 <dt><span class="paramLabel">Parameters:</span></dt>
 <dd><code>fileName</code> - the File Name</dd>
 <dt><span class="returnLabel">Returns:</span></dt>
 <dd>the aggregated log suffix String</dd>
 </dl>
 </li>
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 <pre>public&nbsp;boolean&nbsp;isFsSupportsChmod()</pre>
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 <pre>protected&nbsp;boolean&nbsp;belongsToAppAttempt(<a href="../../../../../../org/apache/hadoop/yarn/api/records/ApplicationAttemptId.html" title="class in org.apache.hadoop.yarn.api.records">ApplicationAttemptId</a>&nbsp;appAttemptId,
                                       <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;containerIdStr)</pre>
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