PM26784: Lock contention may occur with a JAX-RPC application when the BeanSerializerFactory uses FilePermissionCollection.

6.1.0.37: Java SDK 1.5 SR12 FP3 Cumulative Fix for WebSphere
7.0.0.17: Java SDK 1.6 SR9 FP1 Cumulative Fix for WebSphere Application Server
6.1.0.47: WebSphere Application Server V6.1 Fix Pack 47
7.0.0.27: Java SDK 1.6 SR13 FP2 Cumulative Fix for WebSphere Application Server
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
7.0.0.19: Java SDK 1.6 SR9 FP2 Cumulative Fix for WebSphere Application Server
7.0.0.21: Java SDK 1.6 SR9 FP2 Cumulative Fix for WebSphere
7.0.0.23: Java SDK 1.6 SR10 FP1 Cumulative Fix for WebSphere
7.0.0.25: Java SDK 1.6 SR11 Cumulative Fix for WebSphere Application Server
7.0.0.27: Java SDK 1.6 SR12 Cumulative Fix for WebSphere Application Server
7.0.0.29: Java SDK 1.6 SR13 FP2 Cumulative Fix for WebSphere Application Server
7.0.0.45: Java SDK 1.6 SR16 FP60 Cumulative Fix for WebSphere Application Server
7.0.0.31: Java SDK 1.6 SR15 Cumulative Fix for WebSphere Application Server
7.0.0.35: Java SDK 1.6 SR16 FP1 Cumulative Fix for WebSphere Application Server
7.0.0.37: Java SDK 1.6 SR16 FP3 Cumulative Fix for WebSphere Application Server
7.0.0.39: Java SDK 1.6 SR16 FP7 Cumulative Fix for WebSphere Application Server
7.0.0.41: Java SDK 1.6 SR16 FP20 Cumulative Fix for WebSphere Application Server
7.0.0.43: Java SDK 1.6 SR16 FP41 Cumulative Fix for WebSphere Application Server

APAR status

• Closed as program error.

Error description

• Multiple threads may lock on the FilePermission code when
  running a JAX-RPC application.  These locks may reduce overall
  system throughput.
  
  Here is an example stack that may be seen within a javacore
  file:
  
  java/io/FilePermissionCollection.implies
  
  org/eclipse/osgi/framework/internal/core/ConditionalPermissionSe
  t.implies
  
  org/eclipse/osgi/framework/internal/core/BundleCombinedPermissio
  ns.implies
  
  java/security/ProtectionDomain.implies
  
  java/security/AccessController.checkPermission
  
  java/lang/SecurityManager.checkPermission
  
  com/ibm/ws/security/core/SecurityManager.checkPermission
  
  java/lang/SecurityManager.checkMemberAccess
  
  java/lang/Class.checkMemberAccess
  
  java/lang/Class.getDeclaredMethods
  
  com/ibm/ws/webservices/engine/utils/JavaUtils._getValueMethod
  
  com/ibm/ws/webservices/engine/utils/JavaUtils.isEnumClass
  
  com/ibm/ws/webservices/engine/encoding/ser/BeanSerializerFactory
  .<init>
  com/ibm/ws/webservices/engine/encoding/ser/BeanSerializerFactory
  .create
  sun/reflect/GeneratedMethodAccessor62.invoke
  
  sun/reflect/DelegatingMethodAccessorImpl.invoke
  
  java/lang/reflect/Method.invoke
  
  com/ibm/ws/webservices/engine/encoding/ser/BaseSerializerFactory
  $CreateFactoryPRIV.run
  
  java/security/AccessController.doPrivileged
  
  com/ibm/ws/security/util/AccessController.doPrivileged
  
  com/ibm/ws/webservices/engine/encoding/ser/BaseSerializerFactory
  .createFactory
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED:  IBM WebSphere Application Server V6.1 and   *
  *                  V7.0 users or administrators of JAX-RPC     *
  *                  applications                                *
  ****************************************************************
  * PROBLEM DESCRIPTION: Lock contention may occur with a        *
  *                      JAX-RPC application when the            *
  *                      BeanSerializerFactory uses              *
  *                      FilePermissionCollection.               *
  ****************************************************************
  * RECOMMENDATION:  Install a fix pack containing this APAR.    *
  ****************************************************************
  Multiple threads may lock on the FilePermission code when
  running a JAX-RPC application.  These locks may reduce overall
  system throughput.
  
  Here is an example stack that may be seen within a javacore
  file:
  
  java/io/FilePermissionCollection.implies
  
  org/eclipse/osgi/framework/internal/core/ConditionalPermissionSe
  t.implies
  
  org/eclipse/osgi/framework/internal/core/BundleCombinedPermissio
  ns.implies
  
  java/security/ProtectionDomain.implies
  
  java/security/AccessController.checkPermission
  
  java/lang/SecurityManager.checkPermission
  
  com/ibm/ws/security/core/SecurityManager.checkPermission
  
  java/lang/SecurityManager.checkMemberAccess
  
  java/lang/Class.checkMemberAccess
  
  java/lang/Class.getDeclaredMethods
  
  com/ibm/ws/webservices/engine/utils/JavaUtils._getValueMethod
  
  com/ibm/ws/webservices/engine/utils/JavaUtils.isEnumClass
  
  com/ibm/ws/webservices/engine/encoding/ser/BeanSerializerFactory
  .<init>
  com/ibm/ws/webservices/engine/encoding/ser/BeanSerializerFactory
  .create
  sun/reflect/GeneratedMethodAccessor62.invoke
  
  sun/reflect/DelegatingMethodAccessorImpl.invoke
  
  java/lang/reflect/Method.invoke
  
  com/ibm/ws/webservices/engine/encoding/ser/BaseSerializerFactory
  $CreateFactoryPRIV.run
  
  java/security/AccessController.doPrivileged
  
  com/ibm/ws/security/util/AccessController.doPrivileged
  
  com/ibm/ws/webservices/engine/encoding/ser/BaseSerializerFactory
  .createFactory
  

Problem conclusion

• The JAX-RPC runtime inspects each XML serializer and
  deserializer to determine if the XML construct represents an
  enumeration.  This detection code causes excessive locking
  while obtaining permission to inspect the class.  The
  detection code is moved from the initialization logic to a
  later point in the code.  This deferral should eliminate most
  of the detection calls.
  
  The fix for this APAR is currently targeted for inclusion in
  fix packs 6.1.0.37 and 7.0.0.17.  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

• R700 PSY

     UP