MustGather: Out of Memory exceptions on HP-UX, Part 1

Technote (FAQ)
Problem
MustGather for troubleshooting WebSphere® Application Server java.lang.OutOfMemory exceptions on the HP-UX platform. Gathering this information before calling IBM support will help familiarize you with the troubleshooting process and save you time.
Solution
If you have already contacted support, continue on to the component's specific MustGather information. Otherwise, click: MustGather: Read first for all WebSphere Application Server products.

Out of Memory specific MustGather information

Two conditions can cause a java.lang.OutOfMemory exception:

  • The Java™ virtual machine (JVM™) might run out of Java heap space to allocate a Java object.
  • The JVM might not be able to allocate the native memory that it needs to create or execute it's threads.

Follow the below instructions to setup the failing system for capturing required information:

  1. Recycle WebSphere Application Server logs.
  2. Enable the following:
    -Xverbosegc:file=Xverbosegc.out

    Note: For more instructions, see Enabling verbosegc in WebSphere Application Server.


  3. Restart the application server.
  4. Run the application until reoccurrences of java.lang.OutOfMemory exceptions occur.
  5. Stop the application server.
  6. Collect the following information:
    • Xverbosegc.out
    • For V6.0 release:
      • All files in <install_root>/profiles/<ProfileName>/logs/<ServerName> directory.
      • All files in <install_root>/profiles/<ProfileName>/logs/ffdc directory.
      • A copy of server.xml located in <install_root>/profiles/<ProfileName>/config/cells/<CellName>/nodes/<NodeName>/servers/<ServerName>director
    • For V5.0 and V5.1 releases:
      • Include all of the files from the <install_root>/logs/<ServerName>directory.
      • All files in <install_root>/logs/ffdc directory.
      • A copy of server.xml located at <install_root>/config/cells/<CellName>/nodes/<nodeName>/servers/<ServerName> directory
    • For V3.5 and V4.0 releases:
      • Include all of the files from the <install_root>/logs directory.
      • A copy of XMLExport for the server configuration
    • Note: For all versions, If you have configured the application server to write logs into a different location, send them accordingly.

  7. Follow instructions to send diagnostic information to IBM support.

For a listing of all technotes, downloads, and educational materials specific to the Out of Memory component, search the WebSphere Application Server support site.

Related information
Enabling verbosegc in WebSphere

Interpreting -Xverbosegc output

HPjmeter

Submitting information to IBM support

Steps to getting support

MustGather: Read first

Troubleshooting guide












Document Information

Product categories: Software, Application Servers, Distributed Application & Web Servers, WebSphere Application Server, Out of Memory
Operating system(s): HPUX
Software version: 3.5, 4.0, 5.0, 5.1, 6.0
Reference #: 1164686
IBM Group: Software Group
Modified date: 2004-12-10