java.lang.OutOfMemoryError: Resource temporarily unavailable in tsStartJavaThread (lifecycle.c:1097)

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Applies To:
Linux Version:  OEL-6.5
WLS - 10.3.6
OSB - 11.1.1.7
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Problem:
OSB becomes unavailable/unresponsive under heavy load.

Error:
java.lang.OutOfMemoryError: Resource temporarily unavailable in tsStartJavaThread (lifecycle.c:1097).

Attempting to allocate 8096M 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)
Disable compressed references (-XXcompressedRefs=false)


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Cause:
/etc/security/limits.conf file nproc value is overwritten by /etc/security/limits.d/90-nproc.conf and setting max user processes 1024

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Resolution:
We need to change nproc value in /etc/security/limits.d/90-nproc.conf

Default Values:
# Default limit for number of user's processes to prevent
# accidental fork bombs.
# See rhbz #432903 for reasoning.

*          soft    nproc     1024
root       soft    nproc     unlimited

New Values:
# Default limit for number of user's processes to prevent
# accidental fork bombs.
# See rhbz #432903 for reasoning.

*          soft    nproc     unlimited
root       soft    nproc     unlimited