3465736 - Many RetainedFree logs exist in non-HSR system

There is no HANA System Replication enabled (see below <hdbnsutil -sr_state>), but there are a large number of log segments (from indexserver) in RetainedFree status which fill up /hana/log volume.

<hdbnsutil -sr_state>
--------------------------------------

System Replication State
~~~~~~~~~~~~~~~~~~~~~~~~

online: true

mode: none
done.
--------------------------------------

<log status>
--------------------------------------
> for i in $(find -L /hana/log/${DIR_INSTANCE:9:3} -name 'hdb*' -type d) ; do echo $i ; hdblogdiag seglist $i | grep -oP 'Formatting|Preallocated|Writing|Closed|Truncated|BackedUp|RetainedFree|\bFree\b' | sort | uniq -c ; done

/hana/log/SID/mnt00001/hdb00001
1 Free
1 Writing
/hana/log/SID/mnt00001/hdb00002.00003
589 RetainedFree
1 Writing 
...
--------------------------------------


global.ini from tenant DB (/usr/sap/<SID>/SYS/global/hdb/custom/config/DB_<tenant DB>) contains the same or similar entries as below.
--------------------------------------
[system_replication]
mode = primary
actual_mode = primary
...
enable_log_retention = on
...
--------------------------------------

global.ini from SYSTEMDB (/usr/sap/<SID>/SYS/global/hdb/custom/config) may also contain some HSR related parameters as below.
--------------------------------------
[system_replication]
timetravel_logreplay_mode = auto
operation_mode = logreplay
replication_port_offset = 100
...
[system_replication_hostname_resolution]
...
--------------------------------------

indexserver trace may contain the same or similar messages like below.
----------------------------
[22860]{-1}[-1/-1] 2024-05-06 14:31:07.505552 i Logger           LoggerImpl.cpp(00534) : Initial Log Retention: On
...
Line 34737: [22409]\{100162\}[21/108253169] 2024-05-06 16:39:12.413958 i Logger           LoggerImpl.cpp(01592) : Try to free RETAINED_FREE segments, logshipping_max_retention_size=109,943,193,600byte
Line 35157: [22346]\{100162\}[21/108253230] 2024-05-06 16:42:11.968918 i Logger           LoggerImpl.cpp(01592) : Try to free RETAINED_FREE segments, logshipping_max_retention_size=1,098,907,648byte
Line 35855: [56842]{-1}[-1/-1] 2024-05-06 16:57:19.617017 i Logger           (00534) : Initial Log Retention: On
---------------------------- 
or
---------------------------- 
[48344]{-1}[-1/-1] 2024-05-17 15:37:48.875881 i PersistenceManag PersistenceManagerImpl.cpp(05508) : Configure System Replication Primary in Persistence Manager
[48344]{-1}[-1/-1] 2024-05-17 15:37:48.876833 i sr_dataaccess    DisasterRecoveryPrimaryImpl.cpp(02426) : Secondary with siteId=0 () opMode=invalid operation mode is newly registered 
---------------------------- 

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SAP HANA, platform edition 2.0

HANA, log, RetainedFree, Free, system replication, HSR, non-HSR, Initial Log Retention: On, enable_log_retention , KBA , HAN-DB-HA , SAP HANA High Availability (System Replication, DR, etc.) , Problem