2855530 - HADR Rep Agent infected with signal 11 after failover - SRS 16.0

• HADR failover SITE2 to SITE1 failed with command, "sap_host_available SITE2" with the following message in companion SRS log: 

User 'DR_admin' writes: '** HADR operation: sap_host_available SITE2,'
User 'DR_admin' writes: '** Message: failed'

• Rep Agent Thread (RAT) fails with a Signal 11 error in the module ll_del() with a stack trace in the ASE error log:

Current process (0x2490125) infected with signal 11 (SIGSEGV)
Address 0x0x00007f4d0158554f (ll_del+0x7), siginfo (code, address) = (1, 0x0x0000000000000008)

• The stack trace shows only the following functions:

kernel pc: 0x00000000014a3340 pcstkwalk+0x482()
kernel pc: 0x00000000014a2cff ucstkgentrace+0x20f()
kernel pc: 0x000000000149f522 ucbacktrace+0x54()
kernel pc: 0x0000000001774357 terminate_process+0x1367()
kernel pc: 0x00000000014cf57c kisignal+0x686()
kernel pc: 0x00007f4d0158554f ll_del+0x7()
kernel pc: 0x0000000268e0c110 ()
...
kernel pcstkwalk: No more space in buffer to hold stack frames
kernel end of stack trace, spid 210, kpid 38338853, suid 0

Note: The complete stack trace is available under Attachments.

• SAP Replication Server (SRS) 16.0 SP03 PL04
• SAP Adaptive Server Enterprise (ASE) 16.0 SP03 PL04 with High Availability Disaster Recovery (HADR) for Business Suite
  
• SAP Netweaver 7.5

RepServer, repagent, RepAgent, fallback, SEGV, segmentation, storage, access, violation, fault, segfault, kisignal, stacktrace,  stack, registers , KBA , BC-SYB-REP-SAP , Replication with SAP Suite / SAP BW , Bug Filed