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https://issues.apache.org/jira/browse/MAPREDUCE-6425?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Junping Du updated MAPREDUCE-6425:
----------------------------------
    Fix Version/s: 2.8.0

> ShuffleHandler passes wrong "base" parameter to getMapOutputInfo if mapId is 
> not in the cache.
> ----------------------------------------------------------------------------------------------
>
>                 Key: MAPREDUCE-6425
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-6425
>             Project: Hadoop Map/Reduce
>          Issue Type: Bug
>          Components: mrv2, nodemanager
>            Reporter: zhihai xu
>            Assignee: zhihai xu
>             Fix For: 2.8.0, 2.7.2, 3.0.0-alpha1
>
>         Attachments: MAPREDUCE-6425.000.patch, MAPREDUCE-6425.001.patch
>
>
> ShuffleHandler passes wrong {{base}} parameter to {{getMapOutputInfo}} if 
> mapId is not in the cache.
> {{getMapOutputInfo}} expected the {{base}} parameter is 
> {{getBaseLocation(jobId, user) + mapId}}
> When it is called inside populateHeaders, the {{base}} parameter is set 
> correctly
> {code}
>         String base = outputBaseStr + mapId;
>         MapOutputInfo outputInfo = getMapOutputInfo(base, mapId, reduce, 
> user);
> {code}
> When  it is called outside populateHeaders, the {{base}} parameter is set 
> wrongly to outputBasePathStr after number of mapId cached exceeds 
> {{mapOutputMetaInfoCacheSize}}.
> {code}
>          String outputBasePathStr = getBaseLocation(jobId, user);
>           MapOutputInfo info = mapOutputInfoMap.get(mapId);
>           if (info == null) {
>             info = getMapOutputInfo(outputBasePathStr, mapId, reduceId, user);
>           }
> {code}



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