Closed as program error.
Error Message: While running Cognos Content Manager to process compressed data, the application throws an IOException with the error string "Corrupt GZIP trailer". This only happens intermittently (when system load is high), but once the symptom appears, the server must be restarted before it can function normally. The issue is only seen when the server is running on Java 5 (WAS 6) on either z/Linux or z/OS. . Stack Trace: java.io.IOException: Corrupt GZIP trailer at java/util/zip/GZIPInputStream.readTrailer at java/util/zip/GZIPInputStream.read at java/io/FilterInputStream.read at com/cognos/cm/util/GzipInflater.inflate java.io.IOException: Corrupt GZIP trailer at java/util/zip/GZIPInputStream.readTrailer at java/util/zip/GZIPInputStream.read at java/io/FilterInputStream.read at com/cognos/cm/multipart/ResponseFileAttachment.write .
This issue only happens when the GZIPInputStream methods are inlined by the JIT compiler into the com/cognos/cm/util/GzipInflater.inflate method and/or the com/cognos/cm/multipart/ResponseFileAttachment.write method. It can be worked around by excluding the affected com/cognos/cm methods from JIT compilation.
The problem is caused by a bug in the System z code generator in the Java 5 JIT compiler. It generates incorrect instructions to compare a long variable against an int variable that has been extended to 64 bits and stored into memory. The generated code miscalculates the memory address for the stored extended int value, and ends up performing an invalid comparison.
This defect will be fixed in: 5.0.0 SR13 FP1 . The JIT compiler has been updated to generate correct instructions for this scenario. . To obtain the fix: Install build 20111108 or later
Reported component name
JAVA 5 JIT
Reported component ID
Last modified date
APAR is sysrouted FROM one or more of the following:
APAR is sysrouted TO one or more of the following:
Fixed component name
JAVA 5 JIT
Fixed component ID
Applicable component levels
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