Agent crashes with "SIGSEGV" messages.
Its bug in 11.3 and 11.4 Agent(where agent tries to use exhausted memory and failes).
Release : 11.3 and 11.4 only on Unix box.
Component : CA Workload Automation System Agent
This issue has been addressed in 11.5 and 12 plus Agent version.
For more info you may refer to below link with problem number 332.