APAR status
Closed as program error.
Error description
A deadlock is observed in integration server deployed with adapter node flows. A javacore captured at the time of issue shows the following call stack for the adapter related threads. 3XMTHREADINFO "MbAdapter Idle Timeout Monitor thread" J9VMThread:0x00000000004CB100, omrthread_t:0x0000022FFE421B98, java/lang/Thread:0x0000000740280830, state:B, prio=5 3XMJAVALTHREAD (java/lang/Thread getId:0x26, isDaemon:true) 3XMTHREADINFO1 (native thread ID:0x2540, native priority:0x5, native policy:UNKNOWN, vmstate:B, vm thread flags:0x00000281) 3XMCPUTIME CPU usage total: 72.734375000 secs, user: 71.234375000 secs, system: 1.500000000 secs, current category="Application" 3XMTHREADBLOCK Blocked on: com/ibm/broker/jca/MbConnectionPoolManager@0x000000074528A240 Owned by: "Thread-104" (J9VMThread:0x0000000000C9FC00, java/lang/Thread:0x0000000747A0C888) 3XMHEAPALLOC Heap bytes allocated since last GC cycle=0 (0x0) 3XMTHREADINFO3 Java callstack: 4XESTACKTRACE at com/ibm/broker/jca/MbConnection PoolManager.purgeIdleConnections(MbConnectionPoolManager.java:3 01(CompiledCode)) 4XESTACKTRACE at com/ibm/broker/jca/MbConnection Manager.purgeIdleConnections(MbConnectionManager.java:162(Compi ledCode)) 4XESTACKTRACE at com/ibm/broker/adapter/deploy/M bOutboundAdapter.purgeIdleConnections(MbOutboundAdapter.java:44 5(CompiledCode)) 4XESTACKTRACE at com/ibm/broker/adapter/deploy/M bAdapterManager.purgeIdleConnections(MbAdapterManager.java:168( CompiledCode)) 4XESTACKTRACE at com/ibm/broker/adapter/deploy/M bAdapterDirector.purgeIdleConnections(MbAdapterDirector.java:42 5(CompiledCode)) 5XESTACKTRACE (entered lock: java/util/Hashtable@0x00000007401EFD98, entry count: 1) 4XESTACKTRACE at com/ibm/broker/adapter/deploy/M bAdapterIdleTimeoutMonitor.run(MbAdapterIdleTimeoutMonitor.java :48) 4XESTACKTRACE at java/lang/Thread.run(Thread.java:812)
Local fix
Problem summary
**************************************************************** USERS AFFECTED: All Users of App Connect Enterprise v11 and v12 using Adapter nodes Platforms affected: MultiPlatform **************************************************************** PROBLEM DESCRIPTION: A deadlock may be observed in integration server deployed with message flow having Adapter nodes. A javacore captured at the time of issue would show the following call stack for the adapter related threads. 3XMTHREADINFO "MbAdapter Idle Timeout Monitor thread" J9VMThread:0x00000000004CB100, omrthread_t:0x0000022FFE421B98, java/lang/Thread:0x0000000740280830, state:B, prio=5 3XMJAVALTHREAD (java/lang/Thread getId:0x26, isDaemon:true) 3XMTHREADINFO1 (native thread ID:0x2540, native priority:0x5, native policy:UNKNOWN, vmstate:B, vm thread flags:0x00000281) 3XMCPUTIME CPU usage total: 72.734375000 secs, user: 71.234375000 secs, system: 1.500000000 secs, current category="Application" 3XMTHREADBLOCK Blocked on: com/ibm/broker/jca/MbConnectionPoolManager@0x000000074528A240 Owned by: "Thread-104" (J9VMThread:0x0000000000C9FC00, java/lang/Thread:0x0000000747A0C888) 3XMHEAPALLOC Heap bytes allocated since last GC cycle=0 (0x0) 3XMTHREADINFO3 Java callstack: 4XESTACKTRACE at com/ibm/broker/jca/MbConnection PoolManager.purgeIdleConnections(MbConnectionPoolManager.java:3 01(CompiledCode)) 4XESTACKTRACE at com/ibm/broker/jca/MbConnection Manager.purgeIdleConnections(MbConnectionManager.java:162(Compi ledCode)) 4XESTACKTRACE at com/ibm/broker/adapter/deploy/M bOutboundAdapter.purgeIdleConnections(MbOutboundAdapter.java:44 5(CompiledCode)) 4XESTACKTRACE at com/ibm/broker/adapter/deploy/M bAdapterManager.purgeIdleConnections(MbAdapterManager.java:168( CompiledCode)) 4XESTACKTRACE at com/ibm/broker/adapter/deploy/M bAdapterDirector.purgeIdleConnections(MbAdapterDirector.java:42 5(CompiledCode)) 5XESTACKTRACE (entered lock: java/util/Hashtable@0x00000007401EFD98, entry count: 1) 4XESTACKTRACE at com/ibm/broker/adapter/deploy/M bAdapterIdleTimeoutMonitor.run(MbAdapterIdleTimeoutMonitor.java :48) 4XESTACKTRACE at java/lang/Thread.run(Thread.java:812)
Problem conclusion
Product has been modified such that deadlock is no longer observed in the Integration server having message flows with Adapter Nodes. --------------------------------------------------------------- The fix is targeted for delivery in the following PTFs: Version Maintenance Level v11.0 11.0.0.23 v12.0 12.0.10.0 The latest available maintenance can be obtained from: http://www-01.ibm.com/support/docview.wss?rs=849&uid=swg27006041 If the maintenance level is not yet available,information on its planned availability can be found on: http://www-1.ibm.com/support/docview.wss?rs=849&uid=swg27006308 ---------------------------------------------------------------
Temporary fix
Comments
APAR Information
APAR number
IT43553
Reported component name
APP CONNECT ENT
Reported component ID
5724J0550
Reported release
B00
Status
CLOSED PER
PE
NoPE
HIPER
NoHIPER
Special Attention
NoSpecatt / Xsystem
Submitted date
2023-04-13
Closed date
2023-09-21
Last modified date
2023-09-21
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
APP CONNECT ENT
Fixed component ID
5724J0550
Applicable component levels
[{"Business Unit":{"code":"BU059","label":"IBM Software w\/o TPS"},"Product":{"code":"SSDR5J","label":"IBM App Connect Enterprise"},"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"B00","Line of Business":{"code":"LOB45","label":"Automation"}}]
Document Information
Modified date:
21 September 2023