PH45704: 0C4 ABEND IN IIOP CONNECTION CLOSING CODE

APAR status

• Closed as program error.

Error description

• Users may see an 0C4 in IIOP connection closing code if an
  unknown host is used on the connection.  The TCB taking the 0C4
  will look similar to:
   native stack frames:
     bp: 0x000000532c4fc600 pc: 0x0000000073c10a50 bbgboa::setSys
  temException__EI11ORB_RequestFPQ2_5CORBA15SystemException+0xf8
     bp: 0x000000532c4fc7c0 pc: 0x0000000073cceadc bbgboa::finish
  _outbound_connect__EI17ZIOPChannelBridgeFP11ORB_RequestPci+0x4b4
     bp: 0x000000532c4fca00 pc: 0x0000000073cce41a bbgboa::outbou
  nd_connect__EI17ZIOPChannelBridgeFP11ORB_RequestP8BOSS_IORi+0x5
  4a
     bp: 0x000000532c4fd580 pc: 0x0000000073cc4c70 bbgboa::ziop_c
  r_sclt_locate_request__EI11ORB_RequestFPQ2_11ORB_Request22Outbo
  und_Locate_StatusUi+0xe8
     bp: 0x000000532c4fd6c0 pc: 0x0000000073b86ec2
  bbgboa::comm_outbound_locate__EI11ORB_RequestFUi+0xd62
     bp: 0x000000532c4fd900 pc: 0x0000000073b677ae bbgboa::Proces
  sOutboundLocateRequest__EI19ACR_ExecutionThreadFP7acrwObj+0xe6
     bp: 0x000000532c4fe300 pc: 0x0000000073b703f4 bbgboa::Remove
  AndProcessWork__EI19ACR_ExecutionThreadFP13ThreadCleanUp+0x814
     bp: 0x000000532c4ff240 pc: 0x0000000073b71f62
  bbgboa::ACR_ExecutionRoutine+0x21a
     bp: 0x000000532c4ff380 pc: 0x000000003c899f38
  ExtraSymbolsModule::CELQPCMM+0xf68
  ...
  
  There may also be FFDC incidents around the same time for
  UnknownHostExceptions, similar to:
  
  ava.net.UnknownHostException: EDC9501I The name does not resolve
  for the supplied parameters.  vmcid: IBM  minor code: 5B6
  completed: Maybe
  	at com.ibm.rmi.iiop.TransportService.getHostIPAddress(Transpor
  tService.java:459)
  	at com.ibm.rmi.Profile.getHostIPAddress(Profile.java:515)
  	at com.ibm.ISecurityLocalObjectBaseL13Impl.SecurityConnectionI
  nterceptor.getHostfromProfile(SecurityConnectionInterceptor.jav
  a:2767)
  	at com.ibm.ISecurityLocalObjectBaseL13Impl.SecurityConnectionI
  nterceptor.getRemoteHostfromProfile(SecurityConnectionIntercept
  or.java:2813)
  	at com.ibm.ISecurityLocalObjectBaseL13Impl.SecurityConnectionI
  nterceptor.getConnectionKeyForLocateRequest(SecurityConnectionI
  nterceptor.java:1438)
  	at com.ibm.ISecurityLocalObjectBaseL13Impl.SecurityConnectionI
  nterceptor.getConnectionKey(SecurityConnectionInterceptor.java:
  1301)
  ....
  

Local fix

• Resolve the UnknownHostException by supplying a valid address.
  

Problem summary

• ****************************************************************
  * USERS AFFECTED:  All users of IBM WebSphere Application      *
  *                  Server                                      *
  *                  V8.5 for z/OS                               *
  ****************************************************************
  * PROBLEM DESCRIPTION: 0C4 in setSystemException in a          *
  *                      WebSphere Application Server for z/OS   *
  *                      controller.                             *
  ****************************************************************
  * RECOMMENDATION:                                              *
  ****************************************************************
  WebSphere Application Server for z/OS controller takes a
  ABEND0C4/ABENDS0C4 in ORB_Request::setSystemException
  because the ORB_Request has been freed and allocated
  as something else.
  When ZIOPChannelBridge.outboundConnect calls
  ZIOPConnectionMap.findOrCreateConnection an error happened
  that caused ZIOPAsyncConnectCallback.destroy to get control
  and drive code that freed the ORB_Request.
  ZIOPChannelBridge.outboundConnect did not realize
  the ORB_Request was freed and created a result that allows
  it's caller to reference the ORB_Request.
  

Problem conclusion

• Changed ZIOPChannelBridge.outboundConnect to create a result
  that tells it's caller that the ORB_Request can not be
  referenced.
  
  
  The fix for this APAR is targeted for inclusion in fix pack
  8.5.5.22 and 9.0.5.13. For more information, see 'Recommended
  Updates for WebSphere Application Server':
  https://www.ibm.com/support/pages/node/715553
  

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