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https://issues.apache.org/jira/browse/MAPREDUCE-3423?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13177306#comment-13177306
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Bhallamudi Venkata Siva Kamesh commented on MAPREDUCE-3423:
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Hi Arun,
Thanks for looking into this. I have not removed null check for mapOutput. I
have removed only null check for mapId and mapId won't be null by the time
outer catch block catches any ioe (considering this patch).
> Fetcher Thread should log proper exception
> ------------------------------------------
>
> Key: MAPREDUCE-3423
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-3423
> Project: Hadoop Map/Reduce
> Issue Type: Bug
> Components: mrv2
> Affects Versions: 0.24.0
> Reporter: Bhallamudi Venkata Siva Kamesh
> Assignee: Bhallamudi Venkata Siva Kamesh
> Attachments: MAPREDUCE-3423-1.patch, MAPREDUCE-3423.patch
>
>
> Exception should be logged properly when there is any while deserializing
> Shuffle Header information .
> {code}
> if (mapId == null || mapOutput == null) {
> LOG.info("fetcher#" + id + " failed to read map header" +
> mapId + " decomp: " +
> decompressedLength + ", " + compressedLength, ioe);
> return false;
> }
> {code}
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