PM17672: OUTOFMEMORY AFTER 10 HOURS OF STRESS RUN IN JAVA HEAP

6.1.0.35: Java SDK 1.5 SR12 FP2 Cumulative Fix for WebSphere
6.1.0.37: Java SDK 1.5 SR12 FP3 Cumulative Fix for WebSphere
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
Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• java.lang.OutOfMemoryError at
  com.ibm.ws390.orb.CommonBridge.nativeRunApplicationThread(Native
  Method)
  
  A heap analysis tool against some of the .phd files which
  were part of the original OutOfMemory error showed the
  following class taking up most of the heap in the servant
  region:
  
  com/ibm/ISecurityLocalObjectCSIv2UtilityImpl/ConnectionTable
  
  It's the server table that's filling up:
  
  com/ibm/ISecurityLocalObjectCSIv2UtilityImpl/SessionManager
        @ 0x8282877e0
   declared fields:
    private com.ibm.ISecurityLocalObjectCSIv2UtilityImpl.
         ConnectionTable serverConnTable = <object> @ 0x828288c20
    private
         com.ibm.ISecurityLocalObjectCSIv2UtilityImpl.
         ConnectionTable clientConnTable = <object> @ 0x828288c58
    private long context_generator = 1 (0x1)
    private com.ibm.ISecurityUtilityImpl.CSIUtil
         csiUtil = <object> @ 0x828288bc8
    int sessionCleanupInterval = 300000 (0x493e0)
    int sessionDiscardUnusedMillis = 900000 (0xdbba0)
    int sessionCacheMaxSize = -1 (0xffffffffffffffff)
    int sessionCacheIdleTime = -1 (0xffffffffffffffff)
  
  com/ibm/ISecurityLocalObjectCSIv2UtilityImpl/ConnectionTable
        @ 0x828288c20
   fields inherited from "java/util/Hashtable":
    transient int elementCount = 185207 (0x2d377)     (!!!)
    transient java.util.Hashtable$Entry[]
        elementData = <object> @ 0x834778700
    private float loadFactor = 0.75 (0x3f400000)
    private int threshold = 294911 (0x47fff)
    transient int firstSlot = 5 (0x5)
    transient int lastSlot = 393211 (0x5fffb)
    transient int modCount = 185207 (0x2d377)
   declared fields:
  
  com/ibm/ISecurityLocalObjectCSIv2UtilityImpl/ConnectionTable
        @ 0x828288c58
   fields inherited from "java/util/Hashtable":
    transient int elementCount = 0 (0x0)
    transient java.util.Hashtable$Entry[] elementData = <object>
        @ 0x828288c90
    private float loadFactor = 0.75 (0x3f400000)
    private int threshold = 8 (0x8)
    transient int firstSlot = 11 (0xb)
    transient int lastSlot = -1 (0xffffffffffffffff)
    transient int modCount = 0 (0x0)
   declared fields:
  
  Notice the table with address ending in c20 has 185107 entries
  in it.
  

Local fix

• Run with the "stateful sessions" option turned off for the
  server that's getting the OOM error.
  On the admin console:
  
   1. Click Security > Global security.
   2. From Authentication, click RMI/IIOP security > CSIv2
      outbound communications.
   3. Stateful sessions > uncheck the checkbox
  

Problem summary

• ****************************************************************
  * USERS AFFECTED:  All users of IBM WebSphere Application      *
  *                  Server V6.1.0                               *
  ****************************************************************
  * PROBLEM DESCRIPTION: java.lang.OutOfMemoryError at           *
  *                      com.ibm.ws390.orb.CommonBridge.nativeRu *
  *                      nApplicationThread(Native               *
  *                      Method)                                 *
  *                                                              *
  *                      A heap analysis tool against some of    *
  *                      the .phd files which                    *
  *                      were part of the original OutOfMemory   *
  *                      error showed the                        *
  *                      following class taking up most of the   *
  *                      heap in the servant                     *
  *                      region:                                 *
  *                                                              *
  *                      com/ibm/ISecurityLocalObjectCSIv2Utilit *
  *                      yImpl/ConnectionTable                   *
  ****************************************************************
  * RECOMMENDATION:                                              *
  ****************************************************************
  WebSphere Application Server was incorrectly creating new
  CSIv2 sessions during a stateless session request flow.
  

Problem conclusion

• WebSphere Application Server has been modified to correctly
  avoid creating CSIv2 sessions during stateless session activity.
  
  APAR PM17672 is currently targeted for inclusion in
  Service Level (Fix Pack) 6.1.0.35 of WebSphere
  Application Server V6.1
  
  Please refer to URL:
  //www.ibm.com/support/docview.wss?rs=404&uid=swg27006970
  for Fix Pack availability.
  

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

  WEBSPHERE FOR Z

• Fixed component ID

  5655I3500

Applicable component levels

• R610 PSY UK62676

     UP10/12/17 P F012

Fix is available

• Select the PTF appropriate for your component level. You will be required to sign in. Distribution on physical media is not available in all countries.