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Posted to common-issues@hadoop.apache.org by "Luke Lu (JIRA)" <ji...@apache.org> on 2012/07/05 11:29:34 UTC
[jira] [Assigned] (HADOOP-8419) GzipCodec NPE upon reset with IBM
JDK
[ https://issues.apache.org/jira/browse/HADOOP-8419?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Luke Lu reassigned HADOOP-8419:
-------------------------------
Assignee: Yu Li (was: Luke Lu)
> GzipCodec NPE upon reset with IBM JDK
> -------------------------------------
>
> Key: HADOOP-8419
> URL: https://issues.apache.org/jira/browse/HADOOP-8419
> Project: Hadoop Common
> Issue Type: Bug
> Components: io
> Affects Versions: 1.0.3
> Reporter: Luke Lu
> Assignee: Yu Li
> Labels: gzip, ibm-jdk
>
> The GzipCodec 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 GZipCodec 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, which causes NPE upon reset. This seems to be an IBM JDK quirk as Sun JDK and OpenJDK doesn't have this issue.
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