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https://issues.apache.org/jira/browse/HBASE-10089?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13841084#comment-13841084
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Liang Xie commented on HBASE-10089:
-----------------------------------
maybe we can enhance hbase findbugs setting file to detect
String.intern()?(probably currently it does, but i don't know, aha)
IIRC, interned string could be gc(ed), so i just curious why it still perm OOM:)
P.S: If you still think intern is the murder, another workaroud is to try
JDK7+, the String.intern() will not allocate in perm anymore:)
> Metrics intern table names cause eventual permgen OOM in 0.94
> -------------------------------------------------------------
>
> Key: HBASE-10089
> URL: https://issues.apache.org/jira/browse/HBASE-10089
> Project: HBase
> Issue Type: Bug
> Affects Versions: 0.94.0, 0.94.14
> Reporter: Dave Latham
> Priority: Minor
>
> As part of the metrics system introduced in HBASE-4768 there are two places
> that hbase uses String interning ( SchemaConfigured and SchemaMetrics ).
> This includes interning table names. We have long running environment where
> we run regular integration tests on our application using hbase. Those tests
> create and drop tables with new names regularly. These leads to filling up
> the permgen with interned table names. Workaround is to periodically restart
> the region servers.
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