3368400 - Alert 88 about Delta Merge failure due to OS exception "Permission Denied"

There are a lot of Alert 88 reported on different tables. 

"Delta Merge was not executed successfully on <host_name:port_number> for table <table_name> in schema <schema_name> for 4 occurrences in the last 24 hours."

In HANA DB indexserver trace file, the following error messages are reported: 

[513845]{-1}[157/846837006] 2023-08-21 04:09:42.377797 e Mergedog         Mergedog.cpp(01311) : Automerge failed: {IndexName: <schema_name>:<table_name>, Trigger: , Critical: 0, ReclaimDelta: false, DeltaMerge: true, OptimizeCompression: false, MainSize: 2967469}, error: Caught exception during delta merge; table = <SID>::<schema_name>:<table_name> (t ####), exception = exception 2030112: Could not delete block, path=3423809-000000fe000d9fa5-00018c03-000000d0-00000001_379502.fileblock, rc=13 (Permission denied)(2488)
[3423942]{-1}[158/846837007] 2023-08-21 04:09:42.439733 i TraceContext     TraceContext.cpp(01347) : UserName=, StatementExecutionID=844439493578761
[3423942]{-1}[158/846837007] 2023-08-21 04:09:42.439733 e NonVolatileMemor NVMFileAccess.cpp(00347) : NVM:---------Could not delete '/hana/tmpfs0/<SID>/mnt00001/hdb00003.00003/NVM-Root/PM-VolumeID3/data1/3423809-000000fe000d9fa5-00018c03-000000d0-00000001_379502.fileblock', error code: 13 (Permission denied)
[3423942]{-1}[158/846837007] 2023-08-21 04:09:42.439768 e NonVolatileMemor NVMProvider.cpp(04861) : NVM:   => put block 3423809 back to delayed queue, stop working on queue
[3423942]{-1}[158/846837007] 2023-08-21 04:09:42.440097 e delta_merge      SaveMergedAttributeJob.cpp(00094) : Caught exception in save merged column job: table = LM3::_SYS_STATISTICS:HOST_SERVICE_THREAD_CALLSTACKS_BASE (t 177335), column id = 201, column name = SNAPSHOT_ID, rc = 2488, exception = exception  1: no.2030112  (Basis/MemoryManager/impl/NVMProvider.cpp:4865) TID: 3423942
    Could not delete block, path=3423809-000000fe000d9fa5-00018c03-000000d0-00000001_379502.fileblock, rc=13 (Permission denied)

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

Alert 88, Automerge failed, Could not delete block, Permission denied , KBA , HAN-DB , SAP HANA Database , Problem