NetScaler reboots and crashes sporadically several times.

No upgrades or changes were made on NetScaler.

The following are the logs from ns.log:

Dec  3 10:03:18 <local0.alert> cns01 [69]: pitboss Thu Dec  3 10:03:18 2015 NSPPE-01 (79611) unexpectedly died due to receiving signal
Dec  3 10:03:18 <local0.alert> cns01 [69]: pitboss Thu Dec  3 10:03:18 2015 There may be a delay restarting process while collecting core dump on NSPPE-01 (79611)
Dec  3 10:03:18 <local0.alert> cns01 [69]: pitboss Thu Dec  3 10:03:18 2015 proc NSPPE-01 (79611) failure. Therefore initiating nCore NetScaler restart according to policy setting (0x29b4)
Dec  3 10:03:18 <local0.alert> cns01 [69]: pitboss Thu Dec  3 10:03:18 2015 NetScaler restart may be delayed if collecting core dump for NSPPE-01 (79611)
Dec  3 10:03:18 <local0.alert> cns01 [69]: pitboss Thu Dec  3 10:03:18 2015 Pitboss declaring system failure: NSPPE-01 (79611) exited
Dec  3 10:03:20 <local0.info> cns01 [69]: pitboss Thu Dec  3 10:03:20 2015 Deleting watch on NSPPE-00 (79610) for ()
Dec  3 10:03:39 <local0.info> cns01 [69]: pitboss Thu Dec  3 10:03:39 2015 Deleting watch on NSPPE-01 (79611) for ()
Dec  3 10:04:26 <local0.info> 148.136.20.224 12/03/2015:09:04:26 GMT cns01 0-PPE-0 : PITBOSS1 Message 251 0 :  "Thu Dec  3 10:04:26 2015 pb_op_longer_hb for critical process NSPPE-00 (84163) 150 secs"
Dec  3 10:04:26 <local0.info> 148.136.20.224 12/03/2015:09:04:26 GMT cns01 0-PPE-0 : PITBOSS1 Message 252 0 :  "Thu Dec  3 10:04:26 2015 pb_op_longer_hb for critical process NSPPE-01 (84164) 150 secs"
Dec  3 10:49:25 <local0.alert> cns01 [69]: pitboss Thu Dec  3 10:49:25 2015 NSPPE-00 (84163) unexpectedly died due to receiving signal
Dec  3 10:49:25 <local0.alert> cns01 [69]: pitboss Thu Dec  3 10:49:25 2015 There may be a delay restarting process while collecting core dump on NSPPE-00 (84163)
Dec  3 10:49:25 <local0.alert> cns01 [69]: pitboss Thu Dec  3 10:49:25 2015 proc NSPPE-00 (84163) failure. Therefore initiating nCore NetScaler restart according to policy setting (0x29b4)
Dec  3 10:49:25 <local0.alert> cns01 [69]: pitboss Thu Dec  3 10:49:25 2015 NetScaler restart may be delayed if collecting core dump for NSPPE-00 (84163)
Dec  3 10:49:25 <local0.alert> cns01 [69]: pitboss Thu Dec  3 10:49:25 2015 Pitboss declaring system failure: NSPPE-00 (84163) exited

Upgrade to the latest NetScaler 11.0, 10.5 or 10.1 build to resolve this issue.

Problem Cause

This is a known issue. The crash is triggered when Authorization header exceeds 3k.