2276464 - Spids hang in 'latch sleep', hanging 'dump tran', Errors 2630 / 871 - SAP ASE

• You are running applications on SAP ASE database.
• On high-concurrency INSERT/DELETE environments, you notice one of the following to occur and subsequently, hang the ASE server:
• One or more hanging spids are seen in sysprocesses or sp_who output with status 'latch sleep'. These spids cannot be killed.
• 'dump database' or 'dump transaction' process gets stuck and cannot be killed. The spid is shown in master..syslogshold table with name $dmpxact.
• the hanging 'dump tran' event may or may not be preceded by Error 2630 in the ASE errorlog:

Error: 2630, Severity: 21, State: 1
In database 'SID', page 111370512 is linked backward to page 111370515, but that page is linked forward to page 121286312. Please report this internal error to Sybase Technical Support.

• Backup Server and future backups do not take place, as a result.
• ASE errorlog reports stack trace errors accompanied by Error 871 in some cases. The functions in the stack trace:

bt__pgdealloc
bt__shrinkleaf
bt__shrink
bt__ps_shrinkpg
bt_shrink_post

• SAP Adaptive Server Enterprise (ASE) 15.7 SP136
• SAP Adaptive Server Enterprise (ASE) 16.0 SP01
• SAP Adaptive Server Enterprise (ASE) 16.0 SP02
• SAP Adaptive Server Enterprise (ASE) 15.7 SP136 for Business Suite
• SAP Adaptive Server Enterprise (ASE) 16.0 SP01 for Business Suite
• SAP Adaptive Server Enterprise (ASE) 16.0 SP02 for Business Suite

CR767494, CR#767494, 767494, CR792164, CR#792164, 792164, CR797184, CR797184, CR#797184, 797184, CR797186, CR#797186, 797186, CR798255, CR798255, CR#798255, 798255, CR797550, CR#797550, 797550, hung, HK GC, post-commit shrink, housekeeper garbage collection, traceflag, trace, flag, 3993, 3991, BT_SHRINK
, KBA , BC-DB-SYB , Business Suite on Adaptive Server Enterprise , BC-SYB-ASE , Sybase ASE Database Platform (non Business Suite) , Bug Filed