hfile doesn't recycle decompressors
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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
Fix For: 0.20.0
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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