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Tsuyoshi Ozawa commented on HADOOP-8419: ---------------------------------------- Backported this to branch-2 for targeting 2.8.0. > 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 > Fix For: 1.1.2, 2.0.5-alpha, 2.8.0 > > Attachments: HADOOP-8419-branch-1.patch, > HADOOP-8419-branch1-v2.patch, HADOOP-8419-trunk-v2.patch, > HADOOP-8419-trunk.patch > > > 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. -- This message was sent by Atlassian JIRA (v6.3.4#6332)