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From "Allen Wittenauer (JIRA)" <j...@apache.org>
Subject [jira] [Resolved] (MAPREDUCE-154) Mapper runs out of memory
Date Mon, 21 Jul 2014 17:54:41 GMT

     [ https://issues.apache.org/jira/browse/MAPREDUCE-154?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Allen Wittenauer resolved MAPREDUCE-154.
----------------------------------------

    Resolution: Cannot Reproduce

> Mapper runs out of memory
> -------------------------
>
>                 Key: MAPREDUCE-154
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-154
>             Project: Hadoop Map/Reduce
>          Issue Type: Bug
>         Environment: Amazon EC2 Extra Large instance (4 cores, 15 GB RAM), Sun Java 6
(1.6.0_10); 1 Master, 4 Slaves (all the same); each Java process takes the argument "-Xmx700m"
(2 Java processes per Instance)
>            Reporter: Richard J. Zak
>
> The hadoop job has the task of processing 4 directories in HDFS, each with 15 files.
 This is sample data, a test run, before I go to the needed 5 directories of about 800 documents
each.  The mapper takes in nearly 200 pages (not files) and throws an OutOfMemory exception.
 The largest file is 17 MB.
> If this problem is something on my end and not truly a bug, I apologize.  However, after
Googling a bit, I did see many threads of people running out of memory with small data sets.



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