3202176 - HANA DB recovery or system replication unregistration failed with error "LSS refused connection (reason: Version mismatch)"

• When you perform a recovery of your HANA DB, you are facing the following error in backup.log.

2022-05-04T13:58:55+09:00  P0016051      1808d6f3d71 ERROR   RECOVERY RECOVER DATA finished with error: [448] recovery could not be completed, [110092] Recovery failed in nameserver startup: An error occured while retrieving topology from backup: exception 301102: lss exception: LSS refused connection (reason: Version mismatch)

And in nameserver trace, you also notice the following information.

[16105]{-1}[-1/-1] 2022-05-04 13:58:51.866099 e LssClient        LssClientTracer.cpp(00035) : isAvailable [controller]: lss exception: LSS refused connection (reason: Version mismatch)
[16105]{-1}[-1/-1] 2022-05-04 13:58:51.866252 e Crypto           LssController.cpp(00051) : LSS call failed: exception  1: no.301102  (Crypto/LocalSecureStoreClient/ExceptionTranslator.hpp:102) TID: 16105
    lss exception: LSS refused connection (reason: Version mismatch)
[16105]{-1}[-1/-1] 2022-05-04 13:58:51.866363 e RootKeyManager   RootKeyStoreTypeGetter.hpp(00135) : Failed to read usage information from LSS: exception  1: no.301102  (Crypto/LocalSecureStoreClient/ExceptionTranslator.hpp:102) TID: 16105
    lss exception: LSS refused connection (reason: Version mismatch)
[16105]{-1}[-1/-1] 2022-05-04 13:58:51.866409 i RootKeyManager   RootKeyManager.cpp(00153) : Singleton RootKeyManager serves keys for database ID: 1
[16105]{-1}[-1/-1] 2022-05-04 13:58:51.867392 i RootKeyManager   RootKeyManager.cpp(00153) : Singleton RootKeyManager serves keys for database ID: 1
[16118]{-1}[-1/-1] 2022-05-04 13:58:55.390841 e LssClient        LssClientTracer.cpp(00035) : isAvailable [controller]: lss exception: LSS refused connection (reason: Version mismatch)
[16118]{-1}[-1/-1] 2022-05-04 13:58:55.390977 e Crypto           LssController.cpp(00051) : LSS call failed: exception  1: no.301102  (Crypto/LocalSecureStoreClient/ExceptionTranslator.hpp:102) TID: 16118
    lss exception: LSS refused connection (reason: Version mismatch)
[16118]{-1}[-1/-1] 2022-05-04 13:58:55.392750 e Backup           BackupMgr_Manager.cpp(06501) : Aborting recovery because of exception  1: no.110092  (Backup/impl/Backup_Recover.cpp:101) TID: 16118
    Recovery failed in nameserver startup: An error occured while retrieving topology from backup: exception 301102: lss exception: LSS refused connection (reason: Version mismatch)
exception throw location:

......

[16118]{-1}[-1/-1] 2022-05-04 13:58:55.404512 e Backup           BackupMgr_Manager.cpp(06551) : :::: RECOVERY finished with error: [448] recovery could not be completed, [110092] Recovery failed in nameserver startup: An error occured while retrieving topology from backup: exception 301102: lss exception: LSS refused connection (reason: Version mismatch)
 ::::
[16118]{-1}[-1/-1] 2022-05-04 13:58:56.188064 i DaemonClient     Network.cpp(00070) : Message "stop with comment". Daemon pid 16021. Child pid 16051
[16118]{-1}[-1/-1] 2022-05-04 13:58:56.189889 f NameServer       TREXNameServer.cpp(03731) : An error occured while retrieving topology from backup: exception 301102: lss exception: LSS refused connection (reason: Version mismatch)
 -> stopping instance ...

• When trying to unregister a system replication site, you get the same error:
  
  

> hdbnsutil -sr_unregister
unregistering site ...
nameserver <host>:<port> not responding.
unhandled ltt exception: exception 301102: lss exception: LSS refused connection (reason: Version mismatch)
failed. trace file <nameserver trace> may contain more error details.

• You run into same error when trying to uninstall LSS using resident hdblcm

INFO:     Output line 8: unhandled ltt exception: exception 301102: lss exception: LSS refused connection (reason: Version mismatch)

 "Image/data in this KBA is from SAP internal systems, sample data, or demo systems. Any resemblance to real data is purely coincidental." 

SAP HANA, platform edition 2.0

recovery, LSS, version mismatch, LSS refused connection , KBA , HAN-DB-BAC , SAP HANA Backup & Recovery , HAN-DB-SEC , SAP HANA Security & User Management , Problem