It is possible for a user to exhaust the system process table by
causing a large number of threads/processes to be left in a zombie state.
More information is available here:
this issue was fixed in upstream here:
See Bug 133069. The fix referenced above does not address the issue under
discussion here. The fix referenced in 133069 cannot be directly ported to RHEL
due to kabi, but there's a proposal to implement something similar that will work.
closed as per bug 133069