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SnapMirror Initialization fails with error: "Checksum mismatch (Replication engine error)"

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ontap-9
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dp
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Applies to

  • ONTAP 9.8
  • All-Flash Fas (AFF)
  • SnapMirror

Issue

  • This KB only applies when the SnapMirror source cluster is running ONTAP 9.8 on an All-Flash FAS (AFF) cluster
  • An initial SnapMirror transfer fails with error after transferring some amount of data:
    Transfer failed. (Checksum mismatch(Replication engine error))
    
  • There are no issues on the network as described in the below KB

SnapMirror transfers fail with checksum mismatch or unmarshal errors 

  • On the destination cluster transfer fails after 8 retries (default value for SnapMirror Policies). Each retry, some amount of data has been transferred to the destination
  • SnapMirror audit logs (/etc/log/snapmirror_audit) indicate the following
Wed Oct 13 14:52:22 UTC 2021 Initialize[Oct 13 14:51:06]:Operation-Uuid=<operation_uuid> Group=none Operation-Cookie=0 action=Defer source=<source_path> destination=<destination_path> status=Failure message=Transfer failed.(Checksum mismatch(Replication engine error))
 
  • On the source cluster, EMS logs (/etc/log/ems or the event log show command) indicate:
repl_Handle_low: repl.engine.error:debug]: params: {'replFailureMsgDetail': '5898509', 'lineNumber': '671', 'replFailureMsg': '5898522', 'functionName': 'virtual void repl_stream::DataSource::DataContext::spinnpResponse(repl_spinnp::Request &, repl_spinnp::Response &)', 'replStatus': '14'}
 
  • Also on the source, SKTrace logs (/etc/log/mlog/sktrace.log) indicate:
REPL_0: repl_spinnp::Session::_handleNextCsmResponse(): | [ddd94d44-1f77-11ec-a7ea-00a098d92444] | [0xffffffff948466f0] result: [status: 91 failure_msg: 5898741 failure_msg_detail: 4063303] received response with error from CSM. csm error: 71 request major op: 7 request minor op: 24from b8e42de7-38fd-11e9-aa37-00a098d92444,f7ea4ced-38fb-11e9-aa37-00a098d92444 at b4775206-cb19-11eb-b63f-d039ea499ab4

 

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