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https://issues.apache.org/jira/browse/HBASE-5881?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Andrew Purtell resolved HBASE-5881.
-----------------------------------
    Resolution: Not A Problem
      Assignee:     (was: ramkrishna.s.vasudevan)

> BuiltIn Gzip compressor & decompressor not getting pooled, leading to native 
> memory leak
> ----------------------------------------------------------------------------------------
>
>                 Key: HBASE-5881
>                 URL: https://issues.apache.org/jira/browse/HBASE-5881
>             Project: HBase
>          Issue Type: Bug
>          Components: io
>    Affects Versions: 0.92.1
>            Reporter: Gopinathan A
>            Priority: Critical
>
> This issue will occur only in hadoop 23.x & above/
> In hadoop 0.20.x
> {code}
> public static void returnDecompressor(Decompressor decompressor) {
>     if (decompressor == null) {
>       return;
>     }
>     decompressor.reset();
>     payback(decompressorPool, decompressor);
>   }
> {code}
> In hadoop 0.23.x
> {code}
>   public static void returnDecompressor(Decompressor decompressor) {
>     if (decompressor == null) {
>       return;
>     }
>     // if the decompressor can't be reused, don't pool it.
>     if (decompressor.getClass().isAnnotationPresent(DoNotPool.class)) {
>       return;
>     }
>     decompressor.reset();
>     payback(decompressorPool, decompressor);
>   }
> {code}
> Here annotation has been added. By default this library will be loaded if 
> there are no native library.
> {code}
> @DoNotPool
> public class BuiltInGzipDecompressor
> {code}
> Due to this each time new compressor/decompressor will be loaded, this leads 
> to native memory leak.
> {noformat}
> 2012-04-25 22:11:48,093 INFO org.apache.hadoop.io.compress.CodecPool: Got 
> brand-new decompressor [.gz]
> 2012-04-25 22:11:48,093 INFO org.apache.hadoop.io.compress.CodecPool: Got 
> brand-new decompressor [.gz]
> 2012-04-25 22:11:48,093 INFO org.apache.hadoop.io.compress.CodecPool: Got 
> brand-new decompressor [.gz]
> {noformat}



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