PM40834: Java Out of Memory Exception causes Rational Developer for System z client sessions to hang

APAR status

• Closed as program error.

Error description

• Java Out of Memory Exception causes Rational Developer for
  System z client sessions to hang.
  The following exception was found in the RSEServer.log:
  ERROR ThreadPoolMonitor: 3772: java.lang.OutOfMemoryError
  com.ibm.etools.zos.server.CoreJNI.receive(Native Method)
  com.ibm.etools.zos.server.ThreadPoolMonitor.run(ThreadPoolMonito
  r.java:77)
  java.lang.Thread.run(Thread.java:811)
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED: All user who invoke content assist for C and *
  *                 C++ files in Remote C/C++ Editor and System  *
  *                 z LPEX Editor.                               *
  ****************************************************************
  * PROBLEM DESCRIPTION: After some time when users edit C/C++   *
  *                      files and invoke content assist, the    *
  *                      RSE server runs out of memory and       *
  *                      causes the client to hang.              *
  ****************************************************************
  * RECOMMENDATION:                                              *
  ****************************************************************
  When many users invoke content assist for C and C++ files,
  due to parsing and caching of header files, the memory
  consumption of the RSE server continues to grow in an unlimited
  fashion until it runs out of memory which then causes the
  client to hang.
  

Problem conclusion

• This fix adds support for the C and C++ miners to perform
  cleanup of memory for header files.
  The default is for the header files to cleanup after the header
  file is unused for 60000 miliseconds.
  This can be changed by adding the following value to
  the rsed.envvars file:
  
  _RSE_JAVAOPTS="$_RSE_JAVAOPTS -DCPP_CLEANUP_INTERVAL=xxxxx"
  
  And modifying the xxxxx value to a number as desired.
  Specifying 0 will prevent the C and C++ miner from caching
  header files which will reduce the performance when invoking
  remote content assist in the editor.
  

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:

Modules/Macros

• FEKFENVR FEKFMCDZ FEKFMVSC
  

Fix information

• Fixed component name

  RD/Z HOST

• Fixed component ID

  5724T0723

Applicable component levels

• R760 PSY UK74316

     UP11/12/05 I 1000

Fix is available

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