IT33261: The amqrmppa process terminates with memory exception in rppAdjustPool or rppLockPool

APAR status

• Closed as program error.

Error description

• The amqrmppa process terminates with a SIGSEGV when acquiring a
  mutex from
  rppLockPool or rppAdjustPool.
  
  amqrmppa    22563   30984 ZS402099 zstAsyncConsume
  MQRC_SYNCPOINT_NOT_AVAILABLE
  amqrmppa    22563   30917 XC130003 xehExceptionHandl     STOP
  amqrmppa    22563   30917 RM454101 rppAdjustPool            STOP
  
  The following failure data capture (FDC) records can be
  observed:
  
  Probe Id          :- XC130003
  Application Name  :- MQM
  Component         :- xehExceptionHandler
  Program Name      :- amqrmppa
  Thread            :- 501    RemoteResponder
  Major Errorcode   :- STOP
  Probe Type        :- HALT6109
  Arith1            :- 11 (0xb)
  Comment1          :- SIGSEGV: address not mapped((nil))
  
  
  O/S Call Stack and MQM Function Stack  with rppLockPool on top
  of stack.
  
  /opt/mqm/lib64/libmqmcs_r.so(+0x103ff8)[0x7fb2f1fb9ff8]
  /opt/mqm/lib64/libmqmcs_r.so(+0x1268ba)[0x7fb2f1fdc8ba]
  /opt/mqm/lib64/libmqmcs_r.so(+0x125b18)[0x7fb2f1fdbb18]
  /opt/mqm/lib64/libmqmcs_r.so(xcsFFSTFn+0x203f)[0x7fb2f1fde97f]
  /opt/mqm/lib64/libmqmcs_r.so(xehExceptionHandler+0x6c9)[0x7fb2f1
  fd1239]
  /lib64/libpthread.so.0(+0xf970)[0x7fb2f16ef970]
  /opt/mqm/lib64/libmqmcs_r.so(xcsRequestMutexSemFn+0x95)[0x7fb2f2
  000dc5]
  /opt/mqm/lib64/libmqmr_r.so(rppLockPool+0xa7)[0x7fb2f2e5d1e7]
  /opt/mqm/lib64/libmqmr_r.so(rppFindPID+0xab)[0x7fb2f2e5e97b]
  /opt/mqm/lib64/libmqmr_r.so(rppAdjustPool+0x1b8)[0x7fb2f2e5fe78]
  /opt/mqm/lib64/libmqmr_r.so(cciResponderThread+0x2cf)[0x7fb2f2c8
  ea9f]
  /opt/mqm/lib64/libmqmcs_r.so(+0x19585e)[0x7fb2f204b85e]
  /lib64/libpthread.so.0(+0x7e91)[0x7fb2f16e7e91]
  /lib64/libc.so.6(clone+0x6d)[0x7fb2f120ecbd]
  
  MQM Function Stack
  rppAdjustPool
  rppFindPID
  rppLockPool
  xcsFFST
  
  O/S Call Stack and MQM Function Stack  with rppAdjustPool on top
  of stack:
  
  /opt/mqm/lib64/libmqmcs_r.so(xcsPrintStackForCurrentThread+0x3e)
  [0x7f17912c6e3e]
  /opt/mqm/lib64/libmqmcs_r.so(+0x11596a)[0x7f17912e196a]
  /opt/mqm/lib64/libmqmcs_r.so(PrepareDumpAreas+0xc07)[0x7f17912e0
  7d7]
  /opt/mqm/lib64/libmqmcs_r.so(xcsFFSTFn+0xb7b)[0x7f17912e2a2b]
  /opt/mqm/lib64/libmqmcs_r.so(xehExceptionHandler+0x6c1)[0x7f1791
  2da051]
  /usr/lib64/libpthread.so.0(+0xf5d0)[0x7f1790a1d5d0]
  /opt/mqm/lib64/libmqmcs_r.so(xcsRequestMutexSemFn+0x95)[0x7f1791
  2fce65]
  /opt/mqm/lib64/libmqmr_r.so(rppAdjustPool+0x376)[0x7f179205a766]
  /opt/mqm/lib64/libmqmr_r.so(rriAsyncConvControl+0x94f)[0x7f17920
  29bff]
  /opt/mqm/lib64/libmqmr_r.so(cciEndConv+0x22c)[0x7f1791e793ec]
  /opt/mqm/lib64/libmqmr_r.so(ccxReceiveThreadCleanup+0x112)[0x7f1
  791e7d542]
  /opt/mqm/lib64/libmqmr_r.so(ccxReceiveThreadFn+0xda)[0x7f1791e7d
  9aa]
  /opt/mqm/lib64/libmqmr_r.so(rrxResponder+0x6ef)[0x7f179203fa8f]
  /opt/mqm/lib64/libmqmr_r.so(ccxResponder+0x274)[0x7f1791e8a2b4]
  /opt/mqm/lib64/libmqmr_r.so(cciResponderThread+0x8b)[0x7f1791e8a
  4ab]
  /opt/mqm/lib64/libmqmcs_r.so(+0x16f05e)[0x7f179133b05e]
  /usr/lib64/libpthread.so.0(+0x7dd5)[0x7f1790a15dd5]
  /usr/lib64/libc.so.6(clone+0x6d)[0x7f179053b02d]
  
  MQM Function Stack
  ccxResponder
  rrxResponder
  ccxReceiveThreadFn
  ccxReceiveThreadCleanup
  cciEndConv
  rriAsyncConvControl
  rppAdjustPool
  xcsFFST
  

Local fix

Problem summary

• ****************************************************************
  USERS AFFECTED:
  Users using MQ client applications with async consume feature in
  XA environment with an external transaction manager.
  
  
  Platforms affected:
  MultiPlatform
  
  ****************************************************************
  PROBLEM DESCRIPTION:
  MQ did not handle an XA error condition 2072 and this caused
  memory exception (SIGSEGV) in amqrmppa process.
  

Problem conclusion

• MQ code has been modified to handle the XA error condition to
  resolve the problem.
  
  ---------------------------------------------------------------
  The fix is targeted for delivery in the following PTFs:
  
  Version    Maintenance Level
  v9.0 LTS   9.0.0.12
  v9.1 LTS   9.1.0.8
  v9.2 LTS   9.2.0.2
  v9.x CD    9.2.2
  
  The latest available maintenance can be obtained from
  'WebSphere MQ Recommended Fixes'
  http://www-1.ibm.com/support/docview.wss?rs=171&uid=swg27006037
  
  If the maintenance level is not yet available information on
  its planned availability can be found in 'WebSphere MQ
  Planned Maintenance Release Dates'
  http://www-1.ibm.com/support/docview.wss?rs=171&uid=swg27006309
  ---------------------------------------------------------------
  

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

  MQ APPLIANCE M2

• Fixed component ID

  5737H4700

Applicable component levels