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From "zhihai xu (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (MAPREDUCE-5969) Private non-Archive Files' size add twice in Distributed Cache directory size calculation.
Date Tue, 15 Jul 2014 02:10:05 GMT

     [ https://issues.apache.org/jira/browse/MAPREDUCE-5969?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

zhihai xu updated MAPREDUCE-5969:
---------------------------------

    Status: Patch Available  (was: Open)

> Private non-Archive Files' size add twice in Distributed Cache directory size calculation.
> ------------------------------------------------------------------------------------------
>
>                 Key: MAPREDUCE-5969
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-5969
>             Project: Hadoop Map/Reduce
>          Issue Type: Bug
>          Components: mrv1
>            Reporter: zhihai xu
>            Assignee: zhihai xu
>         Attachments: MAPREDUCE-5969.branch1.patch
>
>
> Private non-Archive Files' size add twice in Distributed Cache directory size calculation.
Private non-Archive Files list is passed in by "-files" command line option. The Distributed
Cache directory size is used to check whether the total cache files size exceed the cache
size limitation,  the default cache size limitation is 10G.
> I add log in addCacheInfoUpdate and setSize in TrackerDistributedCacheManager.java.
> I use the following command to test:
> hadoop jar ./wordcount.jar org.apache.hadoop.examples.WordCount -files hdfs://host:8022/tmp/zxu/WordCount.java,hdfs://host:8022/tmp/zxu/wordcount.jar
/tmp/zxu/test_in/ /tmp/zxu/test_out
> to add two files into distributed cache:WordCount.java and wordcount.jar.
> WordCount.java file size is 2395 byes and wordcount.jar file size is 3865 bytes. The
total should be 6260.
> The log show these files size added twice:
> add one time before download to local node and add second time after download to local
node, so total file number becomes 4 instead of 2:
> addCacheInfoUpdate size: 6260 num: 2 baseDir: /mapred/local
> addCacheInfoUpdate size: 8683 num: 3 baseDir: /mapred/local
> addCacheInfoUpdate size: 12588 num: 4 baseDir: /mapred/local
> In the code, for Private non-Archive File, the first time we add file size is at 
> getLocalCache:
>             if (!isArchive) {
>               //for private archives, the lengths come over RPC from the 
>               //JobLocalizer since the JobLocalizer is the one who expands
>               //archives and gets the total length
>               lcacheStatus.size = fileStatus.getLen();
>               LOG.info("getLocalCache:" + localizedPath + " size = "
>                   + lcacheStatus.size);
>               // Increase the size and sub directory count of the cache
>               // from baseDirSize and baseDirNumberSubDir.
>               baseDirManager.addCacheInfoUpdate(lcacheStatus);
>             }
> The second time we add file size is at 
> setSize:
>       synchronized (status) {
>         status.size = size;
>         baseDirManager.addCacheInfoUpdate(status);
>       }
> The fix is not to add the file size for for Private non-Archive File after download(downloadCacheObject).



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