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https://issues.apache.org/jira/browse/HCATALOG-587?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13555449#comment-13555449
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Thejas M Nair commented on HCATALOG-587:
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bq. In AppConfig.controllerMRChildOpts we see the JVM args are hard-coded. Why
embed these options in the code, rather than use the string provided in
webhcat-default.xml. My understanding is all default values should be in the
XML file, and the code provides access to the merged config.
I agree. I have also moved the notes about the memory issue to the default.xml
file in HCATALOG-587.2.patch.
> webhcat controller map task takes too much memory
> -------------------------------------------------
>
> Key: HCATALOG-587
> URL: https://issues.apache.org/jira/browse/HCATALOG-587
> Project: HCatalog
> Issue Type: Bug
> Components: webhcat-svr
> Reporter: Thejas M Nair
> Assignee: Thejas M Nair
> Fix For: 0.5, 0.6
>
> Attachments: HCATALOG-587.1.patch, HCATALOG-587.2.patch
>
>
> The webhcat map only task does not need lot of memory. But when a java
> application is started with -server option, it allocates the memory specified
> as max heap size (-Xmx in oracle jre) upfront.
> When combined with the memory used by pig or hive client, this can sometimes
> exceed the maximum memory limit for a map task (if configured).
> Being able to specify the java options for the map task will be useful to
> avoid this issue.
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