[HADOOP-8419] GzipCodec NPE upon reset with IBM JDK

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 1.0.3
• Fix Version/s: 1.1.2, 2.0.5-alpha, 2.8.0, 3.0.0-alpha1
• Component/s: io
• Labels: gzip ibm-jdk
• Target Version/s: 1.1.2
• Assignee: Yu Li
• Reporter: Luke Lu
• Created: 20/May/12 04:23
• Updated: 20/Feb/17 16:21
• Resolved: 23/Feb/13 18:26

Description

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.

Issue Links

• is depended upon by: HADOOP-14097 Remove Java6 specific code from GzipCodec.java
• relates to: HBASE-7145 ReusableStreamGzipCodec NPE upon reset with IBM JDK