Getting Signals in different opcodes post restart in production

Post production deployment restart yesterday, we are getting signals in many interfacing opcodes.

Point to note here is

1. we haven't made any changes to the opcodes that are signalling.

2. Not all instances are throwing signals.

3. Signalled opcodes work fine when instances are re-tried.

Without enabling debug log, this is the signal noticed

Received Signal 11

22449:  /u01/euser_cmdm2/app/pin_eu/portal/7.3/bin/cm

7eaeeec8 waitid   (0, 580e, ffbfb620, 3)

7eade868 waitpid  (580e, ffbfb774, 0, 0, ffbfb7cc, 79fbc2c0) + 60

7ead15e8 system   (ffbfb8c8, 7eb6bc10, 20000, 1, 7eb623f0, ffbfb7cc) + 2ec

7faa8634 printExceptionReport (b, bc00, 2, 5aec, 7fb2edec, d) + 240

7f7e01cc sigsegv_handler (b, 14b4, 3ab84, 0, 7f81ad28, 1400) + 34