Wls815/AIX: Java Core And Out Of Memory Due to Fragment (Doc ID 792960.1)

Last updated on MAY 24, 2017

Applies to:

Oracle WebLogic Server - Version 8.1 and later
IBM AIX on POWER Systems (64-bit)
z*OBSOLETE: IBM AIX5L Based Systems (32-bit)
IBM AIX Based Systems (64-bit)IBM AIX5L Based Systems (32-bit)

Symptoms

Get OutOfMemory error even there are a lot of free spaces in JVM heap when using IBM JDK on AIX. We can see it from java core file looks like:

1TISIGINFO OUTOFMEMORY received

1STHEAPFREE Bytes of Heap Space Free: 43069110
1STHEAPALLOC Bytes of Heap Space Allocated: 7ffffa00

gc trace appear:

<AF[5007]: Allocation Failure. need 19660808 bytes, 233 ms since last AF>
<AF[5008]: Allocation Failure. need 16155496 bytes, 388 ms since last AF>

Cause

Sign In with your My Oracle Support account

Don't have a My Oracle Support account? Click to get started

My Oracle Support provides customers with access to over a
Million Knowledge Articles and hundreds of Community platforms