[jira] [Created] (MAPREDUCE-6652) Add configuration property to prevent JHS from loading jobs with a task count greater than X

["Haibo Chen (JIRA)" <ji...@apache.org>]

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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