Resolution:
Description:
===========
TIBCO BusinessEvents throws java.lang.OutOfMemoryError: unable to create new native thread.

Environment:
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TIBCO BusinessEvents 5.x using AS
All Operating System

Symptoms:
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TIBCO BusinessEvents throws "java.lang.OutOfMemoryError: unable to create new native thread" in different threads.

Cause:
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There is not enough memory to create a thread. It could be due to the following:

1). The heap/stack size are too large
2). The system has limit resource

Resolution:
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The following formula gives out a decent estimate for the number of threads that an application can create:

    (MaxProcessMemory - JVMMemory - ReservedOsMemory) / (ThreadStackSize) = Number of threads

User needs to tune the heap and stack size properly to make it work. Also note that AS is C++ component.  A user will need to leave enough memory for AS to make it work. If all memory resources are allocated to the JVM, it would be good to try the following:

1).  Decreasing the JVM heap size.
2).  Decreasing thread stack size settings in the system. In Linux/Unix, use ulimit -a to check the value.