VenkatSNarayanan commented on code in PR #339:
URL: https://github.com/apache/tez/pull/339#discussion_r1695729883
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tez-mapreduce/src/main/java/org/apache/tez/mapreduce/committer/MROutputCommitter.java:
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@@ -78,6 +79,7 @@ public void initialize() throws IOException {
jobConf.getCredentials().mergeAll(UserGroupInformation.getCurrentUser().getCredentials());
jobConf.setInt(MRJobConfig.APPLICATION_ATTEMPT_ID,
getContext().getDAGAttemptNumber());
+ jobConf.set(MRJobConfig.JOB_COMMITTER_UUID, Utils.getDAGID(getContext()));
Review Comment:
Yes. This ID is unique to a DAG + attempt number - so if we have some other
job, it'll have a different application ID component, while if an attempt fails
and the DAG retries, the attempt number will be different.
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