Symptoms
The customer has decommissioned and removed a DC from their arm of domain controllers servers Unity OE 4.5.x or below may experience panics of both SPs in close proximity .The panic log indicators are:CSX RT: panic requested at: :0 (thread: 139884958963456 aka 139884958963456) [PID:20090 TID:14025 CORE:0 [csx_ic_std.x] [dnsUpd] [04/13/2019 16:18:19 UTC]] (panic action:DEFAULT expr: flags:-) [info:0]Ktrace indicators:019-04-13T16:20:19.613Z" "spb" "Kittyhawk_safe" "20094" "unix/spb/root" "ERROR" "1:1678040" :: "Peer SP A is Down." :: Category=System Component=espkg"2019-04-13T16:21:16.394Z" "pspb" "Kittyhawk_safe" "20094" "unix/spb/root" "INFO" "1:115000d" :: "Internal Information only. PSM File "udoctor" Deleted." :: Category=System Component=psm"2019-04-13T16:21:25.278Z" "priungpr02_spb" "Neo_CEM" "879" "N/A" "ERROR" "14:603ab" :: "Domain Controller servers configured for the SMB server 'DCNAME' are not reachable." :: Category=User Component=Health"2019-04-13T16:21:25.392Z" "spb" "Neo_CEM" "879" "N/A" "WARN" "14:6046f" :: "Storage Processor SP A is restarting" :: Category=User Component=Health.....2019/04/13-16:22:02.666821 94K 7EE0388A0705 sade:SMB: 6:[CIFSERVER] No site defined for domain "gbl.ad.domain.net". Ensure that the Active Directory Site configuration i2019/04/13-16:22:02.666823 0 7EE0388A0705 sade:SMB: 6:[CIFS-SERVER] ncludes the data mover's attached network.2019/04/13-16:22:02.774794 107K 7EE0388A0709 sade:SMB: 6:[CIFS=SERVER] Obsolete DC=XXX at IP=IP-addr of domain DOMNAME removed from list after 605707 seco 2019/04/13-16:22:02.774796 0 7EE0388A0709 sade:SMB: 6:[priungpr02ap002] nds (DomCnt=5,275592 lastUpdt=Sat Apr 6 16:06:26 20192019/04/13-16:22:02.774802 3 7EE0388A0709 sade:SMB: 6:[priungpr02ap002] DC*XXX(IP-addr) R=1 S=17,0xc0000233/27
Cause
The root cause is related to decommissioned domain controller on the customer's network.Due to a Dclist parameter that keeps track of cached DCs , the SPs may panic due to code related problem.
Resolution
Workaround param disablement applied.
