[
https://issues.apache.org/jira/browse/IGNITE-494?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14382039#comment-14382039
]
Ivan Veselovsky commented on IGNITE-494:
----------------------------------------
Problem cause are never stopping threads that start from
org.apache.hadoop.hdfs.PeerCache#startExpiryDaemon .
These threads hold hard references to HadoopClassLoader (due to Runnable loaded
by it and context class loader set), that prevents all its classes from being
freed.
> Ignite node runs OutOfMemory when running Hadoop tasks with native Hadoop
> filesystem
> ------------------------------------------------------------------------------------
>
> Key: IGNITE-494
> URL: https://issues.apache.org/jira/browse/IGNITE-494
> Project: Ignite
> Issue Type: Bug
> Components: hadoop
> Affects Versions: sprint-1
> Reporter: Ivan Veselovsky
> Assignee: Vladimir Ozerov
> Fix For: sprint-2
>
> Attachments: IGNITE-494--b.patch, PermGen.png, classes.png
>
>
> To reproduce: tun terasort Hadoop sample using Ignite mapred engine with
> native Hadoop filesystem (original Hadoop core-site.xml, with e.g.
> fs.defaultFs=hdfs://quickstart.cloudera:8020).
> After ~10 runs of the teragen sample without Ignite node restart the node
> crashes with "Caused by: java.lang.OutOfMemoryError: PermGen space"
> Important to note that this does *not* happen if igfs:// filesystem backed by
> hdfs:// is used: in this case PermGen is cleared okay.
> The below screenshots illustrate the problem.
> (Heap dumps are also available, but they are too large to be attached.)
--
This message was sent by Atlassian JIRA
(v6.3.4#6332)
