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Snapmirror resync on cascade snapmirror 2nd hop stuck in preparing state

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snapmirror
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dp
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Applies to

  • ONTAP 9
  • Cascade SnapMirror
  • SnapMirror resync for 2nd hop

Issue

  • An error occurs in the following situations: 
  1. SnapMirror from A to B is configured and working, 
  2. SnapMirror from A to C is done.
  3. Break the A -> C relationship.
  4. Resync   B -> C 
  5. Resync stucks at Preparing state.
Source
Destination Mirror  Relationship   Total             Last
Path        Type  Path        State   Status         Progress  Healthy
Updated
----------- ---- ------------ ------- -------------- --------- ------- --------
XXXXXXXX:XXXXXX XDP
XXXXXXXX:XXXXXX Snapmirrored Preparing 100.9GB false 07/27 08:38:46　
  • SnapMirror fails with the following errors:

ResyncTransfer[Jul 25 12:21:40]:XXXXXXXXXXXXXXXXXX Operation-Uuid=XXXXXXXXXXXXXXX Group=none Operation-Cookie=0
action=Defer source=XXXXXXX:XXXXXX destination=XXXXXXXX:XXXXXXX status=Failure message=Transfer failed.(Error in snapdiff(No such file or directory))
ResyncTransfer[Jul 25 12:21:40]:XXXXXXXXXXXXXXXXXX Operation-Uuid=XXXXXXXXXXXXXXX Group=none Operation-Cookie=0
action=Info Detected an incomplete transfer that can't be completed.  Reason: Incremental snapshot is no longer available on source volume.  
Performing snap restore to snapmirror.XXXXXXXXXXXXXXXXXXXXXX.
ResyncTransfer[Jul 25 12:21:40]:XXXXXXXXXXXXXXXXXX Operation-Uuid=XXXXXXXXXXXXXXX Group=none Operation-Cookie=0
action=Transfer_snapshots (1 of 1 log entries): snapmirror.XXXXXXXXXXXXXXXXXXXXXXXX

 

 

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