JobHistory should enable history collection after a timeout or some other event
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Key: MAPREDUCE-1763
URL: https://issues.apache.org/jira/browse/MAPREDUCE-1763
Project: Hadoop Map/Reduce
Issue Type: Improvement
Components: jobtracker
Affects Versions: 0.20.1
Reporter: Alex Kozlov
Priority: Critical
If you search for disableHistory in JobHistory.java, one can discover that it
is enabled only at the initialization time. There are two instances where job
history can be disabled:
* if it fails to initialize the the output directories
* If it fails to create a single job history file
There are a few problems with that. One is that there is no way to revert the
flag even if the original problem goes away. Second, these cases should
probably be handled separately. The result of which is that once the job
history file creation fails, the job history mechanism becomes disabled and
there is no way to switch it back.
One simple solution is to have a timeout after which we can try to enable the
job history collection. Another is to have a more granular job history control
per job.
Alex K
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