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From "zhihai xu (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (MAPREDUCE-6425) ShuffleHandler passes wrong "base" parameter to getMapOutputInfo if mapId is not in the cache.
Date Sat, 04 Jul 2015 17:14:04 GMT

     [ https://issues.apache.org/jira/browse/MAPREDUCE-6425?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

zhihai xu updated MAPREDUCE-6425:
---------------------------------
    Attachment:     (was: MAPREDUCE-6425.001.patch)

> 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
>         Attachments: MAPREDUCE-6425.000.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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