java.lang.OutOfMemoryError: classblock allocation

<18-jul-2014 10H46' CEST> <Notice> <StdErr> <BEA-000000> <java.lang.OutOfMemoryError: classblock allocation, 261739296 loaded, 256M footprint, in check_alloc (classalloc.c:215).

Attempting to allocate 3G bytes

There is insufficient native memory for the Java

Runtime Environment to continue.

Possible reasons:

  The system is out of physical RAM or swap space

  In 32 bit mode, the process size limit was hit

Possible solutions:

  Reduce memory load on the system

  Increase physical memory or swap space

  Check if swap backing store is full

  Use 64 bit Java on a 64 bit OS

  Decrease Java heap size (-Xmx/-Xms)

  Decrease number of Java threads

  Decrease Java thread stack sizes (-Xss)