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2971780 - ERROR #6120: SQM detected a failing status from an outstanding AIO (error_code = 28.) - SRS

Symptom

  • A stable device (SD) with the size of 8GB was added to SRS while the underlying raw partition was only 2GB.
  • SRS has used 2GB on this raw partition and attempts to write more data to the SD partition using this raw partition:

1> admin disk_space
2> go
Partition                                                  Logical          Part.Id     Total Segs   Used Segs   Total MB  Used MB    State 
/dev/vgsybdb_RS/SRS_SQD001          SDQ_01              101           2048              532        8192      2128       ON-LINE///                         

  • As SRS attempts to use more than 2GB on this SD partition, it is getting the following errors  and impacted SQT, SQM, DSI threads go down: 

E. 2020/09/21 06:47:36. ERROR #6120 dAIO( ) - d64/sqm/rsaiolinux.c(1019)
        SQM detected a failing status from an outstanding AIO (error_code = 28.).
E. 2020/09/21 06:47:36. ERROR #6026 SQM(221:0 MY_SRV.MY_SRV) - /generic/sqm/sqmio.c(1384)
        Block write failed for queue '221:0', segment 0, block 0. OS dependent error is 'error_code = 28.'
I. 2020/09/21 06:47:36. SQM stopping due to an exception: 221:0 MY_SRV.MY_SRV
E. 2020/09/21 06:47:36. ERROR #6120 dAIO( ) - d64/sqm/rsaiolinux.c(1019)
        SQM detected a failing status from an outstanding AIO (error_code = 28.).
E. 2020/09/21 06:47:36. ERROR #6026 SQM(148:0 MYASE.MYDB) - /generic/sqm/sqmio.c(1384)
        Block write failed for queue '148:0', segment 0, block 0. OS dependent error is 'error_code = 28.'
I. 2020/09/21 06:47:36. SQM stopping due to an exception: 148:0 MYASE.MYDB
E. 2020/09/21 06:47:36. ERROR #30054 WORKER( ) - ric/exec/tran_wrap.c(1559)
        SQM had an error writing to the outbound-queue.
E. 2020/09/21 06:47:36. ERROR #30054 WORKER( ) - ric/exec/tran_wrap.c(1559)
        SQM had an error writing to the outbound-queue.
...


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Environment

  • SAP Replication Server  (SRS)
  • Linux / Unix

Product

SAP Replication Server all versions

Keywords

ENOSPC, space, drop, remove, delete , KBA , BC-SYB-REP , Sybase Replication Server (standalone) , Problem

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