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https://issues.apache.org/jira/browse/HBASE-1293?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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ryan rawson updated HBASE-1293:
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Attachment: HBASE-1293.patch
> hfile doesn't recycle decompressors
> -----------------------------------
>
> Key: HBASE-1293
> URL: https://issues.apache.org/jira/browse/HBASE-1293
> Project: Hadoop HBase
> Issue Type: Bug
> Affects Versions: 0.20.0
> Environment: - all -
> Reporter: ryan rawson
> Assignee: ryan rawson
> Fix For: 0.20.0
>
> Attachments: HBASE-1293.patch
>
>
> The Compression codec stuff from hadoop has the concept of recycling
> compressors and decompressors - this is because a compression codec uses
> "direct buffers" which reside outside the JVM regular heap space. There is a
> risk that under heavy concurrent load we could run out of that 'direct
> buffer' heap space in the JVM.
> HFile does not call algorithm.returnDecompressor and returnCompressor. We
> should fix that.
> I found this bug via OOM crashes under jdk 1.7 - it appears to be partially
> due to the size of my cluster (200gb, 800 regions, 19 servers) and partially
> due to weaknesses in JVM 1.7.
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