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MAPREDUCE-3837. Job tracker is not able to recover jobs after crash. Contributed by Mayank Bansal. 

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-0.23@1243698 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Konstantin Shvachko 2012-02-13 21:16:22 +00:00
parent 87cd58b0f9
commit 10c7f0eb15
2 changed files with 12 additions and 5 deletions
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3
hadoop-mapreduce-project/CHANGES.txt
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@ -2649,6 +2649,9 @@ Release 0.22.1 - Unreleased
BUG FIXES
MAPREDUCE-3837. Job tracker is not able to recover jobs after crash.
(Mayank Bansal via shv)
Release 0.22.0 - 2011-11-29
INCOMPATIBLE CHANGES

14
hadoop-mapreduce-project/src/java/org/apache/hadoop/mapred/JobTracker.java
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@ -1192,13 +1192,17 @@ public void recover() {
try {
Path jobInfoFile = getSystemFileForJob(jobId);
FSDataInputStream in = fs.open(jobInfoFile);
JobInfo token = new JobInfo();
final JobInfo token = new JobInfo();
token.readFields(in);
in.close();
UserGroupInformation ugi =
UserGroupInformation.createRemoteUser(token.getUser().toString());
submitJob(token.getJobID(), restartCount,
ugi, token.getJobSubmitDir().toString(), true, null);
final UserGroupInformation ugi =
UserGroupInformation.createRemoteUser(token.getUser().toString());
ugi.doAs(new PrivilegedExceptionAction<JobStatus>() {
public JobStatus run() throws IOException ,InterruptedException{
return submitJob(token.getJobID(), restartCount,
ugi, token.getJobSubmitDir().toString(), true, null);
}});
recovered++;
} catch (Exception e) {
LOG.warn("Could not recover job " + jobId, e);