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https://issues.apache.org/jira/browse/HBASE-7145?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13536190#comment-13536190
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Ted Yu commented on HBASE-7145:
-------------------------------
[~stack]:
Can you take a look at patch v3 ?
> ReusableStreamGzipCodec NPE upon reset with IBM JDK
> ---------------------------------------------------
>
> Key: HBASE-7145
> URL: https://issues.apache.org/jira/browse/HBASE-7145
> Project: HBase
> Issue Type: Sub-task
> Affects Versions: 0.94.0
> Reporter: Yu Li
> Assignee: Yu Li
> Labels: gzip, ibm-jdk
> Fix For: 0.96.0
>
> Attachments: 7145-trunk-v3.txt, HBASE-7145.1.patch.txt,
> HBASE-7145.2_trunk.patch.txt
>
>
> This is the same issue as described in HADOOP-8419, repeat the issue
> description here:
> The ReusableStreamGzipCodec will NPE upon reset after finish when the native
> zlib codec is not loaded. When the native zlib is loaded the codec creates a
> CompressorOutputStream that doesn't have the problem, otherwise, the
> ReusableStreamGzipCodec uses GZIPOutputStream which is extended to provide
> the resetState method. Since IBM JDK 6 SR9 FP2 including the current JDK 6
> SR10, GZIPOutputStream#finish will release the underlying deflater(calls the
> deflater's end method), which causes NPE upon reset. This seems to be an IBM
> JDK quirk as Sun JDK and OpenJDK doesn't have this issue.
> Since in HBASE-5387 HBase source has refactor its code not to use hadoop's
> GzipCodec during real compress/decompress, it's necessary to make a separate
> patch for HBase on the same issue
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