nslcd exited abnormally and generated core files on RHEL6

Issue

• nslcd exited abnormally and generated a core file immediately after it was restarted.

/var/log/messages:Aug 28 10:29:41 server1 nslcd[233348]: version 0.7.5 starting
/var/log/messages:Aug 28 10:29:41 server1 nslcd[233348]: accepting connections
/var/log/messages:Aug 28 10:30:01 server1 kernel: nslcd[233352]: segfault at 10 ip 00000033656091c0 sp 00007f3450fea778 error 4
/var/log/messages:Aug 28 10:30:01 server1 kernel: nslcd[233350]: segfault at 10 ip 00000033656091c0 sp 00007f34519eb938 error 4 in libpthread-2.12.so[3365600000+17000]

• In the backtrace of the core file, we can see that PR_Lock, which is the function of nspr, receives unexpected value(0). However we couldn't find out the cause of that.