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https://issues.apache.org/jira/browse/MAPREDUCE-6652?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15317401#comment-15317401
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Hadoop QA commented on MAPREDUCE-6652:
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| {color:blue}0{color} | {color:blue} reexec {color} | {color:blue} 0m 0s 
{color} | {color:blue} Docker mode activated. {color} |
| {color:red}-1{color} | {color:red} docker {color} | {color:red} 0m 5s {color} 
| {color:red} Docker failed to build yetus/hadoop:2c91fd8. {color} |
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|| Subsystem || Report/Notes ||
| JIRA Patch URL | 
https://issues.apache.org/jira/secure/attachment/12808485/mapreduce6652.005.patch
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| JIRA Issue | MAPREDUCE-6652 |
| Console output | 
https://builds.apache.org/job/PreCommit-MAPREDUCE-Build/6538/console |
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> 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
>         Attachments: mapreduce6652.001.patch, mapreduce6652.002.patch, 
> mapreduce6652.003.patch, mapreduce6652.004.patch, mapreduce6652.005.patch
>
>
> 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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