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| <div class="subTitle">org.apache.hadoop.mapred</div> |
| <h2 title="Class FileOutputCommitter" class="title">Class FileOutputCommitter</h2> |
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| <li> |
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| <li><a href="../../../../org/apache/hadoop/mapreduce/OutputCommitter.html" title="class in org.apache.hadoop.mapreduce">org.apache.hadoop.mapreduce.OutputCommitter</a></li> |
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| <ul class="inheritance"> |
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| <li> |
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| <li>org.apache.hadoop.mapred.FileOutputCommitter</li> |
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| <pre>@InterfaceAudience.Public |
| @InterfaceStability.Stable |
| public class <span class="typeNameLabel">FileOutputCommitter</span> |
| extends <a href="../../../../org/apache/hadoop/mapred/OutputCommitter.html" title="class in org.apache.hadoop.mapred">OutputCommitter</a></pre> |
| <div class="block">An <a href="../../../../org/apache/hadoop/mapred/OutputCommitter.html" title="class in org.apache.hadoop.mapred"><code>OutputCommitter</code></a> that commits files specified |
| in job output directory i.e. ${mapreduce.output.fileoutputformat.outputdir}.</div> |
| </li> |
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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"> </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>static org.slf4j.Logger</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/hadoop/mapred/FileOutputCommitter.html#LOG">LOG</a></span></code> </td> |
| </tr> |
| <tr 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/mapred/FileOutputCommitter.html#SUCCEEDED_FILE_NAME">SUCCEEDED_FILE_NAME</a></span></code> </td> |
| </tr> |
| <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/mapred/FileOutputCommitter.html#TEMP_DIR_NAME">TEMP_DIR_NAME</a></span></code> |
| <div class="block">Temporary directory name</div> |
| </td> |
| </tr> |
| </table> |
| </li> |
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| <tr> |
| <th class="colOne" scope="col">Constructor and Description</th> |
| </tr> |
| <tr class="altColor"> |
| <td class="colOne"><code><span class="memberNameLink"><a href="../../../../org/apache/hadoop/mapred/FileOutputCommitter.html#FileOutputCommitter--">FileOutputCommitter</a></span>()</code> </td> |
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| <caption><span id="t0" class="activeTableTab"><span>All Methods</span><span class="tabEnd"> </span></span><span id="t2" class="tableTab"><span><a href="javascript:show(2);">Instance Methods</a></span><span class="tabEnd"> </span></span><span id="t4" class="tableTab"><span><a href="javascript:show(8);">Concrete Methods</a></span><span class="tabEnd"> </span></span><span id="t6" class="tableTab"><span><a href="javascript:show(32);">Deprecated Methods</a></span><span class="tabEnd"> </span></span></caption> |
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| <th class="colFirst" scope="col">Modifier and Type</th> |
| <th class="colLast" scope="col">Method and Description</th> |
| </tr> |
| <tr id="i0" class="altColor"> |
| <td class="colFirst"><code>void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/hadoop/mapred/FileOutputCommitter.html#abortJob-org.apache.hadoop.mapred.JobContext-int-">abortJob</a></span>(<a href="../../../../org/apache/hadoop/mapred/JobContext.html" title="interface in org.apache.hadoop.mapred">JobContext</a> context, |
| int runState)</code> |
| <div class="block">For aborting an unsuccessful job's output.</div> |
| </td> |
| </tr> |
| <tr id="i1" class="rowColor"> |
| <td class="colFirst"><code>void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/hadoop/mapred/FileOutputCommitter.html#abortTask-org.apache.hadoop.mapred.TaskAttemptContext-">abortTask</a></span>(<a href="../../../../org/apache/hadoop/mapred/TaskAttemptContext.html" title="interface in org.apache.hadoop.mapred">TaskAttemptContext</a> context)</code> |
| <div class="block">Discard the task output.</div> |
| </td> |
| </tr> |
| <tr id="i2" class="altColor"> |
| <td class="colFirst"><code>void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/hadoop/mapred/FileOutputCommitter.html#cleanupJob-org.apache.hadoop.mapred.JobContext-">cleanupJob</a></span>(<a href="../../../../org/apache/hadoop/mapred/JobContext.html" title="interface in org.apache.hadoop.mapred">JobContext</a> context)</code> |
| <div class="block"><span class="deprecatedLabel">Deprecated.</span> </div> |
| </td> |
| </tr> |
| <tr id="i3" class="rowColor"> |
| <td class="colFirst"><code>void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/hadoop/mapred/FileOutputCommitter.html#commitJob-org.apache.hadoop.mapred.JobContext-">commitJob</a></span>(<a href="../../../../org/apache/hadoop/mapred/JobContext.html" title="interface in org.apache.hadoop.mapred">JobContext</a> context)</code> |
| <div class="block">For committing job's output after successful job completion.</div> |
| </td> |
| </tr> |
| <tr id="i4" class="altColor"> |
| <td class="colFirst"><code>void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/hadoop/mapred/FileOutputCommitter.html#commitTask-org.apache.hadoop.mapred.TaskAttemptContext-">commitTask</a></span>(<a href="../../../../org/apache/hadoop/mapred/TaskAttemptContext.html" title="interface in org.apache.hadoop.mapred">TaskAttemptContext</a> context)</code> |
| <div class="block">To promote the task's temporary output to final output location.</div> |
| </td> |
| </tr> |
| <tr id="i5" 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/mapred/FileOutputCommitter.html#getWorkPath-org.apache.hadoop.mapred.TaskAttemptContext-org.apache.hadoop.fs.Path-">getWorkPath</a></span>(<a href="../../../../org/apache/hadoop/mapred/TaskAttemptContext.html" title="interface in org.apache.hadoop.mapred">TaskAttemptContext</a> context, |
| <a href="../../../../org/apache/hadoop/fs/Path.html" title="class in org.apache.hadoop.fs">Path</a> outputPath)</code> </td> |
| </tr> |
| <tr id="i6" class="altColor"> |
| <td class="colFirst"><code>boolean</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/hadoop/mapred/FileOutputCommitter.html#isCommitJobRepeatable-org.apache.hadoop.mapred.JobContext-">isCommitJobRepeatable</a></span>(<a href="../../../../org/apache/hadoop/mapred/JobContext.html" title="interface in org.apache.hadoop.mapred">JobContext</a> context)</code> |
| <div class="block">Returns true if an in-progress job commit can be retried.</div> |
| </td> |
| </tr> |
| <tr id="i7" class="rowColor"> |
| <td class="colFirst"><code>boolean</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/hadoop/mapred/FileOutputCommitter.html#isRecoverySupported--">isRecoverySupported</a></span>()</code> |
| <div class="block"><span class="deprecatedLabel">Deprecated.</span> </div> |
| </td> |
| </tr> |
| <tr id="i8" class="altColor"> |
| <td class="colFirst"><code>boolean</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/hadoop/mapred/FileOutputCommitter.html#isRecoverySupported-org.apache.hadoop.mapred.JobContext-">isRecoverySupported</a></span>(<a href="../../../../org/apache/hadoop/mapred/JobContext.html" title="interface in org.apache.hadoop.mapred">JobContext</a> context)</code> |
| <div class="block">Is task output recovery supported for restarting jobs? |
| |
| If task output recovery is supported, job restart can be done more |
| efficiently.</div> |
| </td> |
| </tr> |
| <tr id="i9" class="rowColor"> |
| <td class="colFirst"><code>boolean</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/hadoop/mapred/FileOutputCommitter.html#needsTaskCommit-org.apache.hadoop.mapred.TaskAttemptContext-">needsTaskCommit</a></span>(<a href="../../../../org/apache/hadoop/mapred/TaskAttemptContext.html" title="interface in org.apache.hadoop.mapred">TaskAttemptContext</a> context)</code> |
| <div class="block">Check whether task needs a commit.</div> |
| </td> |
| </tr> |
| <tr id="i10" class="altColor"> |
| <td class="colFirst"><code>void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/hadoop/mapred/FileOutputCommitter.html#recoverTask-org.apache.hadoop.mapred.TaskAttemptContext-">recoverTask</a></span>(<a href="../../../../org/apache/hadoop/mapred/TaskAttemptContext.html" title="interface in org.apache.hadoop.mapred">TaskAttemptContext</a> context)</code> |
| <div class="block">Recover the task output.</div> |
| </td> |
| </tr> |
| <tr id="i11" class="rowColor"> |
| <td class="colFirst"><code>void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/hadoop/mapred/FileOutputCommitter.html#setupJob-org.apache.hadoop.mapred.JobContext-">setupJob</a></span>(<a href="../../../../org/apache/hadoop/mapred/JobContext.html" title="interface in org.apache.hadoop.mapred">JobContext</a> context)</code> |
| <div class="block">For the framework to setup the job output during initialization.</div> |
| </td> |
| </tr> |
| <tr id="i12" class="altColor"> |
| <td class="colFirst"><code>void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/hadoop/mapred/FileOutputCommitter.html#setupTask-org.apache.hadoop.mapred.TaskAttemptContext-">setupTask</a></span>(<a href="../../../../org/apache/hadoop/mapred/TaskAttemptContext.html" title="interface in org.apache.hadoop.mapred">TaskAttemptContext</a> context)</code> |
| <div class="block">Sets up output for the task.</div> |
| </td> |
| </tr> |
| </table> |
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| <h3>Methods inherited from class org.apache.hadoop.mapred.<a href="../../../../org/apache/hadoop/mapred/OutputCommitter.html" title="class in org.apache.hadoop.mapred">OutputCommitter</a></h3> |
| <code><a href="../../../../org/apache/hadoop/mapred/OutputCommitter.html#abortJob-org.apache.hadoop.mapreduce.JobContext-org.apache.hadoop.mapreduce.JobStatus.State-">abortJob</a>, <a href="../../../../org/apache/hadoop/mapred/OutputCommitter.html#abortTask-org.apache.hadoop.mapreduce.TaskAttemptContext-">abortTask</a>, <a href="../../../../org/apache/hadoop/mapred/OutputCommitter.html#cleanupJob-org.apache.hadoop.mapreduce.JobContext-">cleanupJob</a>, <a href="../../../../org/apache/hadoop/mapred/OutputCommitter.html#commitJob-org.apache.hadoop.mapreduce.JobContext-">commitJob</a>, <a href="../../../../org/apache/hadoop/mapred/OutputCommitter.html#commitTask-org.apache.hadoop.mapreduce.TaskAttemptContext-">commitTask</a>, <a href="../../../../org/apache/hadoop/mapred/OutputCommitter.html#isCommitJobRepeatable-org.apache.hadoop.mapreduce.JobContext-">isCommitJobRepeatable</a>, <a href="../../../../org/apache/hadoop/mapred/OutputCommitter.html#isRecoverySupported-org.apache.hadoop.mapreduce.JobContext-">isRecoverySupported</a>, <a href="../../../../org/apache/hadoop/mapred/OutputCommitter.html#needsTaskCommit-org.apache.hadoop.mapreduce.TaskAttemptContext-">needsTaskCommit</a>, <a href="../../../../org/apache/hadoop/mapred/OutputCommitter.html#recoverTask-org.apache.hadoop.mapreduce.TaskAttemptContext-">recoverTask</a>, <a href="../../../../org/apache/hadoop/mapred/OutputCommitter.html#setupJob-org.apache.hadoop.mapreduce.JobContext-">setupJob</a>, <a href="../../../../org/apache/hadoop/mapred/OutputCommitter.html#setupTask-org.apache.hadoop.mapreduce.TaskAttemptContext-">setupTask</a></code></li> |
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| <h3>Methods inherited from class 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> |
| </ul> |
| </li> |
| </ul> |
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| </div> |
| <div class="details"> |
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| <!-- ============ FIELD DETAIL =========== --> |
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| <h3>Field Detail</h3> |
| <a name="LOG"> |
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| </a> |
| <ul class="blockList"> |
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| <h4>LOG</h4> |
| <pre>public static final org.slf4j.Logger LOG</pre> |
| </li> |
| </ul> |
| <a name="TEMP_DIR_NAME"> |
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| </a> |
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| <li class="blockList"> |
| <h4>TEMP_DIR_NAME</h4> |
| <pre>public static final <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> TEMP_DIR_NAME</pre> |
| <div class="block">Temporary directory name</div> |
| <dl> |
| <dt><span class="seeLabel">See Also:</span></dt> |
| <dd><a href="../../../../constant-values.html#org.apache.hadoop.mapred.FileOutputCommitter.TEMP_DIR_NAME">Constant Field Values</a></dd> |
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| <a name="SUCCEEDED_FILE_NAME"> |
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| <h4>SUCCEEDED_FILE_NAME</h4> |
| <pre>public static final <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> SUCCEEDED_FILE_NAME</pre> |
| <dl> |
| <dt><span class="seeLabel">See Also:</span></dt> |
| <dd><a href="../../../../constant-values.html#org.apache.hadoop.mapred.FileOutputCommitter.SUCCEEDED_FILE_NAME">Constant Field Values</a></dd> |
| </dl> |
| </li> |
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| <!-- ========= CONSTRUCTOR DETAIL ======== --> |
| <ul class="blockList"> |
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| </a> |
| <h3>Constructor Detail</h3> |
| <a name="FileOutputCommitter--"> |
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| </a> |
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| <h4>FileOutputCommitter</h4> |
| <pre>public FileOutputCommitter()</pre> |
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| <h3>Method Detail</h3> |
| <a name="getWorkPath-org.apache.hadoop.mapred.TaskAttemptContext-org.apache.hadoop.fs.Path-"> |
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| <h4>getWorkPath</h4> |
| <pre>public <a href="../../../../org/apache/hadoop/fs/Path.html" title="class in org.apache.hadoop.fs">Path</a> getWorkPath(<a href="../../../../org/apache/hadoop/mapred/TaskAttemptContext.html" title="interface in org.apache.hadoop.mapred">TaskAttemptContext</a> context, |
| <a href="../../../../org/apache/hadoop/fs/Path.html" title="class in org.apache.hadoop.fs">Path</a> outputPath) |
| 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> |
| </ul> |
| <a name="setupJob-org.apache.hadoop.mapred.JobContext-"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>setupJob</h4> |
| <pre>public void setupJob(<a href="../../../../org/apache/hadoop/mapred/JobContext.html" title="interface in org.apache.hadoop.mapred">JobContext</a> context) |
| 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="descfrmTypeLabel">Description copied from class: <code><a href="../../../../org/apache/hadoop/mapred/OutputCommitter.html#setupJob-org.apache.hadoop.mapred.JobContext-">OutputCommitter</a></code></span></div> |
| <div class="block">For the framework to setup the job output during initialization. This is |
| called from the application master process for the entire job. This will be |
| called multiple times, once per job attempt.</div> |
| <dl> |
| <dt><span class="overrideSpecifyLabel">Specified by:</span></dt> |
| <dd><code><a href="../../../../org/apache/hadoop/mapred/OutputCommitter.html#setupJob-org.apache.hadoop.mapred.JobContext-">setupJob</a></code> in class <code><a href="../../../../org/apache/hadoop/mapred/OutputCommitter.html" title="class in org.apache.hadoop.mapred">OutputCommitter</a></code></dd> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>context</code> - Context of the job whose output is being written.</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 temporary output could not be created</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="commitJob-org.apache.hadoop.mapred.JobContext-"> |
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| </a> |
| <ul class="blockList"> |
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| <h4>commitJob</h4> |
| <pre>public void commitJob(<a href="../../../../org/apache/hadoop/mapred/JobContext.html" title="interface in org.apache.hadoop.mapred">JobContext</a> context) |
| 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="descfrmTypeLabel">Description copied from class: <code><a href="../../../../org/apache/hadoop/mapred/OutputCommitter.html#commitJob-org.apache.hadoop.mapred.JobContext-">OutputCommitter</a></code></span></div> |
| <div class="block">For committing job's output after successful job completion. Note that this |
| is invoked for jobs with final runstate as SUCCESSFUL. This is called |
| from the application master process for the entire job. This is guaranteed |
| to only be called once. If it throws an exception the entire job will |
| fail.</div> |
| <dl> |
| <dt><span class="overrideSpecifyLabel">Overrides:</span></dt> |
| <dd><code><a href="../../../../org/apache/hadoop/mapred/OutputCommitter.html#commitJob-org.apache.hadoop.mapred.JobContext-">commitJob</a></code> in class <code><a href="../../../../org/apache/hadoop/mapred/OutputCommitter.html" title="class in org.apache.hadoop.mapred">OutputCommitter</a></code></dd> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>context</code> - Context of the job whose output is being written.</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> |
| </ul> |
| <a name="cleanupJob-org.apache.hadoop.mapred.JobContext-"> |
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| </a> |
| <ul class="blockList"> |
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| <h4>cleanupJob</h4> |
| <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 void cleanupJob(<a href="../../../../org/apache/hadoop/mapred/JobContext.html" title="interface in org.apache.hadoop.mapred">JobContext</a> context) |
| 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> </div> |
| <div class="block"><span class="descfrmTypeLabel">Description copied from class: <code><a href="../../../../org/apache/hadoop/mapred/OutputCommitter.html#cleanupJob-org.apache.hadoop.mapred.JobContext-">OutputCommitter</a></code></span></div> |
| <div class="block">For cleaning up the job's output after job completion. This is called |
| from the application master process for the entire job. This may be called |
| multiple times.</div> |
| <dl> |
| <dt><span class="overrideSpecifyLabel">Overrides:</span></dt> |
| <dd><code><a href="../../../../org/apache/hadoop/mapred/OutputCommitter.html#cleanupJob-org.apache.hadoop.mapred.JobContext-">cleanupJob</a></code> in class <code><a href="../../../../org/apache/hadoop/mapred/OutputCommitter.html" title="class in org.apache.hadoop.mapred">OutputCommitter</a></code></dd> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>context</code> - Context of the job whose output is being written.</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> |
| </ul> |
| <a name="abortJob-org.apache.hadoop.mapred.JobContext-int-"> |
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| </a> |
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| <h4>abortJob</h4> |
| <pre>public void abortJob(<a href="../../../../org/apache/hadoop/mapred/JobContext.html" title="interface in org.apache.hadoop.mapred">JobContext</a> context, |
| int runState) |
| 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="descfrmTypeLabel">Description copied from class: <code><a href="../../../../org/apache/hadoop/mapred/OutputCommitter.html#abortJob-org.apache.hadoop.mapred.JobContext-int-">OutputCommitter</a></code></span></div> |
| <div class="block">For aborting an unsuccessful job's output. Note that this is invoked for |
| jobs with final runstate as <a href="../../../../org/apache/hadoop/mapred/JobStatus.html#FAILED"><code>JobStatus.FAILED</code></a> or |
| <a href="../../../../org/apache/hadoop/mapred/JobStatus.html#KILLED"><code>JobStatus.KILLED</code></a>. This is called from the application |
| master process for the entire job. This may be called multiple times.</div> |
| <dl> |
| <dt><span class="overrideSpecifyLabel">Overrides:</span></dt> |
| <dd><code><a href="../../../../org/apache/hadoop/mapred/OutputCommitter.html#abortJob-org.apache.hadoop.mapred.JobContext-int-">abortJob</a></code> in class <code><a href="../../../../org/apache/hadoop/mapred/OutputCommitter.html" title="class in org.apache.hadoop.mapred">OutputCommitter</a></code></dd> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>context</code> - Context of the job whose output is being written.</dd> |
| <dd><code>runState</code> - final runstate of the job</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> |
| </ul> |
| <a name="setupTask-org.apache.hadoop.mapred.TaskAttemptContext-"> |
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| </a> |
| <ul class="blockList"> |
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| <h4>setupTask</h4> |
| <pre>public void setupTask(<a href="../../../../org/apache/hadoop/mapred/TaskAttemptContext.html" title="interface in org.apache.hadoop.mapred">TaskAttemptContext</a> context) |
| 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="descfrmTypeLabel">Description copied from class: <code><a href="../../../../org/apache/hadoop/mapred/OutputCommitter.html#setupTask-org.apache.hadoop.mapred.TaskAttemptContext-">OutputCommitter</a></code></span></div> |
| <div class="block">Sets up output for the task. This is called from each individual task's |
| process that will output to HDFS, and it is called just for that task. This |
| may be called multiple times for the same task, but for different task |
| attempts.</div> |
| <dl> |
| <dt><span class="overrideSpecifyLabel">Specified by:</span></dt> |
| <dd><code><a href="../../../../org/apache/hadoop/mapred/OutputCommitter.html#setupTask-org.apache.hadoop.mapred.TaskAttemptContext-">setupTask</a></code> in class <code><a href="../../../../org/apache/hadoop/mapred/OutputCommitter.html" title="class in org.apache.hadoop.mapred">OutputCommitter</a></code></dd> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>context</code> - Context of the task whose output is being written.</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> |
| </ul> |
| <a name="commitTask-org.apache.hadoop.mapred.TaskAttemptContext-"> |
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| </a> |
| <ul class="blockList"> |
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| <h4>commitTask</h4> |
| <pre>public void commitTask(<a href="../../../../org/apache/hadoop/mapred/TaskAttemptContext.html" title="interface in org.apache.hadoop.mapred">TaskAttemptContext</a> context) |
| 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="descfrmTypeLabel">Description copied from class: <code><a href="../../../../org/apache/hadoop/mapred/OutputCommitter.html#commitTask-org.apache.hadoop.mapred.TaskAttemptContext-">OutputCommitter</a></code></span></div> |
| <div class="block">To promote the task's temporary output to final output location. |
| If <a href="../../../../org/apache/hadoop/mapred/OutputCommitter.html#needsTaskCommit-org.apache.hadoop.mapreduce.TaskAttemptContext-"><code>OutputCommitter.needsTaskCommit(TaskAttemptContext)</code></a> returns true and this |
| task is the task that the AM determines finished first, this method |
| is called to commit an individual task's output. This is to mark |
| that tasks output as complete, as <a href="../../../../org/apache/hadoop/mapred/OutputCommitter.html#commitJob-org.apache.hadoop.mapreduce.JobContext-"><code>OutputCommitter.commitJob(JobContext)</code></a> will |
| also be called later on if the entire job finished successfully. This |
| is called from a task's process. This may be called multiple times for the |
| same task, but different task attempts. It should be very rare for this to |
| be called multiple times and requires odd networking failures to make this |
| happen. In the future the Hadoop framework may eliminate this race.</div> |
| <dl> |
| <dt><span class="overrideSpecifyLabel">Specified by:</span></dt> |
| <dd><code><a href="../../../../org/apache/hadoop/mapred/OutputCommitter.html#commitTask-org.apache.hadoop.mapred.TaskAttemptContext-">commitTask</a></code> in class <code><a href="../../../../org/apache/hadoop/mapred/OutputCommitter.html" title="class in org.apache.hadoop.mapred">OutputCommitter</a></code></dd> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>context</code> - Context of the task whose output is being written.</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 commit is not</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="abortTask-org.apache.hadoop.mapred.TaskAttemptContext-"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>abortTask</h4> |
| <pre>public void abortTask(<a href="../../../../org/apache/hadoop/mapred/TaskAttemptContext.html" title="interface in org.apache.hadoop.mapred">TaskAttemptContext</a> context) |
| 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="descfrmTypeLabel">Description copied from class: <code><a href="../../../../org/apache/hadoop/mapred/OutputCommitter.html#abortTask-org.apache.hadoop.mapred.TaskAttemptContext-">OutputCommitter</a></code></span></div> |
| <div class="block">Discard the task output. This is called from a task's process to clean |
| up a single task's output that can not yet been committed. This may be |
| called multiple times for the same task, but for different task attempts.</div> |
| <dl> |
| <dt><span class="overrideSpecifyLabel">Specified by:</span></dt> |
| <dd><code><a href="../../../../org/apache/hadoop/mapred/OutputCommitter.html#abortTask-org.apache.hadoop.mapred.TaskAttemptContext-">abortTask</a></code> in class <code><a href="../../../../org/apache/hadoop/mapred/OutputCommitter.html" title="class in org.apache.hadoop.mapred">OutputCommitter</a></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></dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="needsTaskCommit-org.apache.hadoop.mapred.TaskAttemptContext-"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>needsTaskCommit</h4> |
| <pre>public boolean needsTaskCommit(<a href="../../../../org/apache/hadoop/mapred/TaskAttemptContext.html" title="interface in org.apache.hadoop.mapred">TaskAttemptContext</a> context) |
| 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="descfrmTypeLabel">Description copied from class: <code><a href="../../../../org/apache/hadoop/mapred/OutputCommitter.html#needsTaskCommit-org.apache.hadoop.mapred.TaskAttemptContext-">OutputCommitter</a></code></span></div> |
| <div class="block">Check whether task needs a commit. This is called from each individual |
| task's process that will output to HDFS, and it is called just for that |
| task.</div> |
| <dl> |
| <dt><span class="overrideSpecifyLabel">Specified by:</span></dt> |
| <dd><code><a href="../../../../org/apache/hadoop/mapred/OutputCommitter.html#needsTaskCommit-org.apache.hadoop.mapred.TaskAttemptContext-">needsTaskCommit</a></code> in class <code><a href="../../../../org/apache/hadoop/mapred/OutputCommitter.html" title="class in org.apache.hadoop.mapred">OutputCommitter</a></code></dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>true/false</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> |
| </ul> |
| <a name="isRecoverySupported--"> |
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| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>isRecoverySupported</h4> |
| <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 boolean isRecoverySupported()</pre> |
| <div class="block"><span class="deprecatedLabel">Deprecated.</span> </div> |
| <div class="block"><span class="descfrmTypeLabel">Description copied from class: <code><a href="../../../../org/apache/hadoop/mapred/OutputCommitter.html#isRecoverySupported--">OutputCommitter</a></code></span></div> |
| <div class="block">This method implements the new interface by calling the old method. Note |
| that the input types are different between the new and old apis and this is |
| a bridge between the two.</div> |
| <dl> |
| <dt><span class="overrideSpecifyLabel">Overrides:</span></dt> |
| <dd><code><a href="../../../../org/apache/hadoop/mapred/OutputCommitter.html#isRecoverySupported--">isRecoverySupported</a></code> in class <code><a href="../../../../org/apache/hadoop/mapred/OutputCommitter.html" title="class in org.apache.hadoop.mapred">OutputCommitter</a></code></dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd><code>true</code> if task output recovery is supported, |
| <code>false</code> otherwise</dd> |
| <dt><span class="seeLabel">See Also:</span></dt> |
| <dd><a href="../../../../org/apache/hadoop/mapreduce/OutputCommitter.html#recoverTask-org.apache.hadoop.mapreduce.TaskAttemptContext-"><code>OutputCommitter.recoverTask(TaskAttemptContext)</code></a></dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="isCommitJobRepeatable-org.apache.hadoop.mapred.JobContext-"> |
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| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>isCommitJobRepeatable</h4> |
| <pre>public boolean isCommitJobRepeatable(<a href="../../../../org/apache/hadoop/mapred/JobContext.html" title="interface in org.apache.hadoop.mapred">JobContext</a> context) |
| 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="descfrmTypeLabel">Description copied from class: <code><a href="../../../../org/apache/hadoop/mapred/OutputCommitter.html#isCommitJobRepeatable-org.apache.hadoop.mapred.JobContext-">OutputCommitter</a></code></span></div> |
| <div class="block">Returns true if an in-progress job commit can be retried. If the MR AM is |
| re-run then it will check this value to determine if it can retry an |
| in-progress commit that was started by a previous version. |
| Note that in rare scenarios, the previous AM version might still be running |
| at that time, due to system anomalies. Hence if this method returns true |
| then the retry commit operation should be able to run concurrently with |
| the previous operation. |
| |
| If repeatable job commit is supported, job restart can tolerate previous |
| AM failures during job commit. |
| |
| By default, it is not supported. Extended classes (like: |
| FileOutputCommitter) should explicitly override it if provide support.</div> |
| <dl> |
| <dt><span class="overrideSpecifyLabel">Overrides:</span></dt> |
| <dd><code><a href="../../../../org/apache/hadoop/mapred/OutputCommitter.html#isCommitJobRepeatable-org.apache.hadoop.mapred.JobContext-">isCommitJobRepeatable</a></code> in class <code><a href="../../../../org/apache/hadoop/mapred/OutputCommitter.html" title="class in org.apache.hadoop.mapred">OutputCommitter</a></code></dd> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>context</code> - Context of the job whose output is being written.</dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd><code>true</code> repeatable job commit is supported, |
| <code>false</code> otherwise</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> |
| </ul> |
| <a name="isRecoverySupported-org.apache.hadoop.mapred.JobContext-"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>isRecoverySupported</h4> |
| <pre>public boolean isRecoverySupported(<a href="../../../../org/apache/hadoop/mapred/JobContext.html" title="interface in org.apache.hadoop.mapred">JobContext</a> context) |
| 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="descfrmTypeLabel">Description copied from class: <code><a href="../../../../org/apache/hadoop/mapred/OutputCommitter.html#isRecoverySupported-org.apache.hadoop.mapred.JobContext-">OutputCommitter</a></code></span></div> |
| <div class="block">Is task output recovery supported for restarting jobs? |
| |
| If task output recovery is supported, job restart can be done more |
| efficiently.</div> |
| <dl> |
| <dt><span class="overrideSpecifyLabel">Overrides:</span></dt> |
| <dd><code><a href="../../../../org/apache/hadoop/mapred/OutputCommitter.html#isRecoverySupported-org.apache.hadoop.mapred.JobContext-">isRecoverySupported</a></code> in class <code><a href="../../../../org/apache/hadoop/mapred/OutputCommitter.html" title="class in org.apache.hadoop.mapred">OutputCommitter</a></code></dd> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>context</code> - Context of the job whose output is being written.</dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd><code>true</code> if task output recovery is supported, |
| <code>false</code> otherwise</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> |
| <dt><span class="seeLabel">See Also:</span></dt> |
| <dd><a href="../../../../org/apache/hadoop/mapred/OutputCommitter.html#recoverTask-org.apache.hadoop.mapreduce.TaskAttemptContext-"><code>OutputCommitter.recoverTask(TaskAttemptContext)</code></a></dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="recoverTask-org.apache.hadoop.mapred.TaskAttemptContext-"> |
| <!-- --> |
| </a> |
| <ul class="blockListLast"> |
| <li class="blockList"> |
| <h4>recoverTask</h4> |
| <pre>public void recoverTask(<a href="../../../../org/apache/hadoop/mapred/TaskAttemptContext.html" title="interface in org.apache.hadoop.mapred">TaskAttemptContext</a> context) |
| 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="descfrmTypeLabel">Description copied from class: <code><a href="../../../../org/apache/hadoop/mapred/OutputCommitter.html#recoverTask-org.apache.hadoop.mapred.TaskAttemptContext-">OutputCommitter</a></code></span></div> |
| <div class="block">Recover the task output. |
| |
| The retry-count for the job will be passed via the |
| <code>MRConstants.APPLICATION_ATTEMPT_ID</code> key in |
| <a href="../../../../org/apache/hadoop/mapreduce/JobContext.html#getConfiguration--"><code>JobContext.getConfiguration()</code></a> for the |
| <code>OutputCommitter</code>. This is called from the application master |
| process, but it is called individually for each task. |
| |
| If an exception is thrown the task will be attempted again.</div> |
| <dl> |
| <dt><span class="overrideSpecifyLabel">Overrides:</span></dt> |
| <dd><code><a href="../../../../org/apache/hadoop/mapred/OutputCommitter.html#recoverTask-org.apache.hadoop.mapred.TaskAttemptContext-">recoverTask</a></code> in class <code><a href="../../../../org/apache/hadoop/mapred/OutputCommitter.html" title="class in org.apache.hadoop.mapred">OutputCommitter</a></code></dd> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>context</code> - Context of the task whose output is being recovered</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> |
| </ul> |
| </li> |
| </ul> |
| </li> |
| </ul> |
| </div> |
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