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MAPREDUCE-2740. MultipleOutputs in new API creates needless TaskAttemptContexts. Contributed by Todd Lipcon. 

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1152875 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Todd Lipcon 2011-08-01 17:52:49 +00:00
parent 54860d86ab
commit 22f232bce2
2 changed files with 14 additions and 5 deletions
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3
mapreduce/CHANGES.txt
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@ -212,6 +212,9 @@ Trunk (unreleased changes)
JobInProgress.getCounters() aquire locks in a shorter time period.
(Joydeep Sen Sarma via schen)
MAPREDUCE-2740. MultipleOutputs in new API creates needless
TaskAttemptContexts. (todd)
BUG FIXES
MAPREDUCE-2603. Disable High-Ram emulation in system tests.

10
mapreduce/src/java/org/apache/hadoop/mapreduce/lib/output/MultipleOutputs.java
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@ -132,6 +132,10 @@ public class MultipleOutputs<KEYOUT, VALUEOUT> {
* Cache for the taskContexts
*/
private Map<String, TaskAttemptContext> taskContexts = new HashMap<String, TaskAttemptContext>();
/**
* Cached TaskAttemptContext which uses the job's configured settings
*/
private TaskAttemptContext jobOutputFormatContext;
/**
* Checks if a named output name is valid token.
@ -382,11 +386,13 @@ public class MultipleOutputs<KEYOUT, VALUEOUT> {
public void write(KEYOUT key, VALUEOUT value, String baseOutputPath)
throws IOException, InterruptedException {
checkBaseOutputPath(baseOutputPath);
TaskAttemptContext taskContext =
if (jobOutputFormatContext == null) {
jobOutputFormatContext =
new TaskAttemptContextImpl(context.getConfiguration(),
context.getTaskAttemptID(),
new WrappedStatusReporter(context));
getRecordWriter(taskContext, baseOutputPath).write(key, value);
}
getRecordWriter(jobOutputFormatContext, baseOutputPath).write(key, value);
}
// by being synchronized MultipleOutputTask can be use with a