PK82145: MEMORY HANDLE LEAK IN ADVANCED ADAPTER PROCESS WDISERVER.EXE

APAR status

• Closed as program error.

Error description

• Environment: WDI 3.2.1 for Windows with CSD27
  
  When running the WDI MQ advanced adapter for long periods,
  wdiserver.exe accumulates many memory handles and memory
  usage in wdiserver.exe and wditrigger.exe grows slowly.
  There is an apparent memory leak and memory handle leak.
  If left unchecked, an excessive handle count from wdiserver.exe
  will cause a shortage on the server.
  
  Note: Also tried tweaking the wdi.properties waitinterval and
  numtranslator but with same results.
  
  Recreate scenario:
  - Import maps and profiles.
  - Start the advanced adapter: wdiserver
  - Use Windows Task Manager to monitor the handles.
  - Use RFHUtil to put input XML msg onto XML_IN trigger queue.
  - Check Handle count and see it has increased by 2.
  
  Further analysis shows a leak of 2 handles to occur in
  wdiserver.exe, but only after wdiservice.exe has stopped
  servicing the queue. In other words, if wdiserver is emptying a
  queue of one, or of many messages, there are always two handles
  leaked.  Also note that along with the wdiserver.exe ever
  increasing handle count, there is also a small memory leak in
  both wdiserver.exe and wditrigger.exe, which remain active
  until adpater shutdown.
  
  maps_profiles.eif
  test_392_O_GDU353.xml
  wdi.properties
  
  Keywords: handle handles memory leak slow performance
  degradation degrade degrades
  

Local fix

• Periodically restart the Adavanced adapter by issuing:
  wdishutdown followed by wdiserver commands.
  

Problem summary

• WDIServer process retains two additional resource HANDLES on
  Windows
  for every WDIService child process that it starts.
  

Problem conclusion

• Added code to free the process and thread handles after the
  Create.
  

Temporary fix

Comments

• Defect P8011991 in CMVC for WDIServer and WDIServer33.
  Applies to wdi 3.2 CSD28 and wdi 3.3 SFP2
  WDITranslatorProc.cpp (P8011991)
  

APAR Information

• APAR is sysrouted FROM one or more of the following:

  IC59394

• APAR is sysrouted TO one or more of the following:

Fix information

• Fixed component name

  WEBS DI ZOS

• Fixed component ID

  5655I4003

Applicable component levels

• R330 PSY

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