Haibo Chen created MAPREDUCE-6652:
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Summary: Add configuration property to prevent JHS from loading
jobs with a task count greater than X
Key: MAPREDUCE-6652
URL: https://issues.apache.org/jira/browse/MAPREDUCE-6652
Project: Hadoop Map/Reduce
Issue Type: Improvement
Components: jobhistoryserver
Reporter: Haibo Chen
Assignee: Haibo Chen
Jobs with large number of tasks can have job history files that are large in
size and resource-consuming(mainly memory) to parse in Job History Server. If
there are many such jobs, the job history server can very easily hang.
It would be a good usability feature if we added a new config property that
could be set to X, where the JHS wouldn't load the details for a job with more
than X tasks. The job would still show up on the list of jobs page, but
clicking on it would give a warning message that the job is too big, instead of
actually loading the job. This way we can prevent users from loading a job
that's way too big for the JHS, which currently makes the JHS hang. The default
value can be -1 so that it's disabled.
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