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MAPREDUCE-7319. Log list of mappers at trace level in ShuffleHandler audit log. 

Contributed by Jim Brennan.

(cherry picked from commit 462561654b)
This commit is contained in:
Eric Badger 2021-02-09 19:11:45 +00:00
parent d74e9453d9
commit dbd4ec5e2d
1 changed files with 7 additions and 2 deletions
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9
hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-shuffle/src/main/java/org/apache/hadoop/mapred/ShuffleHandler.java
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@ -1174,8 +1174,13 @@ public class ShuffleHandler extends AuxiliaryService {
StringBuilder sb = new StringBuilder("shuffle for "); StringBuilder sb = new StringBuilder("shuffle for ");
sb.append(jobId).append(" reducer ").append(reduce); sb.append(jobId).append(" reducer ").append(reduce);
sb.append(" length ").append(contentLength); sb.append(" length ").append(contentLength);
sb.append(" mappers: ").append(mapIds); if (AUDITLOG.isTraceEnabled()) {
AUDITLOG.debug(sb.toString()); // For trace level logging, append the list of mappers
sb.append(" mappers: ").append(mapIds);
AUDITLOG.trace(sb.toString());
} else {
AUDITLOG.debug(sb.toString());
}
} }
} }