PM31553: JAVA.NIO.BUFFEROVERFLOWEXCEPTION EXCEPTION MIGHT CAUSES APPLICATION SERVER TO GET IN UNSTABLE STATE

6.1.0.47: WebSphere Application Server V6.1 Fix Pack 47
6.1.0.39: Java SDK 1.5 SR12 FP4 Cumulative Fix for WebSphere Application Server
6.1.0.41: Java SDK 1.5 SR12 FP5 Cumulative Fix for WebSphere Application Server
6.1.0.43: Java SDK 1.5 SR13 Cumulative Fix for WebSphere Application Server
6.1.0.45: Java SDK 1.5 SR14 Cumulative Fix for WebSphere Application Server
6.1.0.47: Java SDK 1.5 SR16 Cumulative Fix for WebSphere Application Server

APAR status

• Closed as program error.

Error description

• JVM error after
  
  Caused by: java.nio.BufferOverflowException
  
  at java.nio.HeapByteBuffer.put(HeapByteBuffer.java:165)
  at
  com.ibm.ws.buffermgmt.impl.WsByteBufferImpl.put(WsByteBufferImpl
  .
  java:663)
  at
  com.ibm.rmm.ptl.tchan.transmitter.StreamT.submitPacketData(Strea
  mT.
  java:815)
  at
  com.ibm.rmm.mtl.transmitter.MTopicT.buildPacket(MTopicT.java:390
  )
  

Local fix

• non
  

Problem summary

• ****************************************************************
  * USERS AFFECTED:  IBM WebSphere Application Server Version    *
  *                  6.1 users.                                  *
  ****************************************************************
  * PROBLEM DESCRIPTION: The SSL Channel may incorrectly         *
  *                      release WsByteBuffers internally and    *
  *                      put it into an unstable state.          *
  ****************************************************************
  * RECOMMENDATION:                                              *
  ****************************************************************
  Under heavy loads, the SSLChannel may incorrectly release
  WsByteBuffers internally. This can happen when a connection is
  closed while the SSL Channel was still holding on to incoming
  data, in cases where the connection was not closed after both
  sides had read all the data. This can cause both the
  HTTPChannel and the SSLChannel to release a given WsByteBuffer
  and thereby put it into an unstable state. This can result in
  an IllegalArgumentException coming from a JDK java.nio.Buffer
  class. For example:
  
  Caused by: java.lang.IllegalArgumentException
  at java.nio.Buffer.position(Buffer.java:218)
  

Problem conclusion

• The SSL Channel was modified to not double release buffers
  
  The fix for this APAR is currently targeted for inclusion in
  fix pack 6.1.0.39.  Please refer to the Recommended Updates
  page for delivery information:
  http://www.ibm.com/support/docview.wss?rs=180&uid=swg27004980
  

Temporary fix

Comments

APAR Information

• APAR is sysrouted FROM one or more of the following:

• APAR is sysrouted TO one or more of the following:

Fix information

• Fixed component name

  WEBS APP SERV N

• Fixed component ID

  5724H8800

Applicable component levels

• R61A PSY

     UP

• R61H PSY

     UP

• R61I PSY

     UP

• R61P PSY

     UP

• R61S PSY

     UP

• R61W PSY

     UP

• R61Z PSY

     UP