sapstartsrv does not respawn after a forceful kill of the master nameserver

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Environment

SUSE Linux Enterprise Server for SAP Applications Service Pack 4
SUSE Linux Enterprise Server for SAP Applications Service Pack 3
SUSE Linux Enterprise Server for SAP Applications Service Pack 2

SUSE Linux Enterprise Server for SAP Applications Service Pack 1
SAPHanaSR-ScaleOut
SAPHanaSR-ScaleUp

Situation

While testing the cluster thoroughly, one of the tests to be conducted is to kill the sapstartsrv process to ensure it is being restarted when the next monitor event occurs. While performing the kill on the slave nameservers, the processes are respawned but when killing the master nameserver nothing happens or is written to the logs. The issue is seen in Scale-Out as well as in Scale-Up environments.

Resolution

Program Temporary Fixes (PTFs) are available for Scale-Out and Scale-Up deployments. Please open a service request and let us know which fix is required.

Cause

A problem with the function saphana_check_local_instance() that calls check_sapstartsrv()(responsible for monitoring the running service and restart operations it if not available).

Additional Information

After applying the fix, the following messages can be seen in /var/log/pacemaker.log when killing the master nameservice:

SAPHanaTopology(rsc_SAPHanaTopology_SAW_HDB00)[2922]: 2019/11/22_08:59:13 INFO: RA ==== end action monitor_clone with rc=0 (0.154.0) (5s)====

-> killing sapstartsrv

SAPHanaTopology(rsc_SAPHanaTopology_SAW_HDB00)[3627]: 2019/11/22_08:59:28 INFO: DEC: site=DEL, mode=primary, MAPPING=hana102, hanaRemoteHost=hana102

SAPHanaTopology(rsc_SAPHanaTopology_SAW_HDB00)[3627]: 2019/11/22_08:59:28 INFO: RA ==== begin action monitor_clone (0.154.0) ====

SAPHanaTopology(rsc_SAPHanaTopology_SAW_HDB00)[3627]: 2019/11/22_08:59:29 INFO: RA ==== end action monitor_clone with rc=0 (0.154.0) (6s)====

SAPHana(rsc_SAPHana_SAW_HDB00)[4238]: 2019/11/22_08:59:33 INFO: RA ==== begin action monitor_clone (0.154.0) ====

SAPHana(rsc_SAPHana_SAW_HDB00)[4238]: 2019/11/22_08:59:33 INFO: RA: SRHOOK1=

SAPHana(rsc_SAPHana_SAW_HDB00)[4238]: 2019/11/22_08:59:33 INFO: RA: SRHOOK2=PRIM

SAPHana(rsc_SAPHana_SAW_HDB00)[4238]: 2019/11/22_08:59:33 INFO: RA: SRHOOK3=PRIM

-> SAPHana(rsc_SAPHana_SAW_HDB00)[4238]: 2019/11/22_08:59:35 WARNING: ACT: sapstartsrv is not running for instance SAW-HDB00, it will be started now

SAPHana(rsc_SAPHana_SAW_HDB00)[4238]: 2019/11/22_08:59:37 INFO: ACT: sapstartsrv for instance SAW-HDB00 was restarted!

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