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Hyper-V Replica stopped working for one VM only

Posted on 2014-02-14
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Last Modified: 2014-11-12
We have Hyper-V replica setup between two hosts across a VPN.  VMHOST001 is the primary where all of the machines run, and VMHOST101 is the secondary/DR site where the machines sit just in case.

Today, at 11:22, one of our four machines stopped replicating.  We received the following errors -

Log Name:      Microsoft-Windows-Hyper-V-VMMS-Admin
Source:        Microsoft-Windows-Hyper-V-VMMS
Date:          2/14/2014 11:22:26 AM
Event ID:      32315
Task Category: None
Level:         Warning
Keywords:      
User:          SYSTEM
Computer:      VMHOST001
Description:
Hyper-V failed to replicate changes for virtual machine 'EXCH001' (Virtual Machine ID 23C80A90-07BE-4DB3-BC65-DA796692F60A). Hyper-V will retry replication after 1 minute(s).

Log Name:      Microsoft-Windows-Hyper-V-VMMS-Admin
Source:        Microsoft-Windows-Hyper-V-VMMS
Date:          2/14/2014 11:22:26 AM
Event ID:      32022
Task Category: None
Level:         Error
Keywords:      
User:          SYSTEM
Computer:      VMHOST001
Description:
Hyper-V could not replicate changes for virtual machine 'EXCH001': The connection with the server was terminated abnormally (0x00002EFE). (Virtual Machine ID 23C80A90-07BE-4DB3-BC65-DA796692F60A)

All of our other machines on this host are replicating just fine.  We're doing replication using Kerberos as both hosts are on the same domain.  Machines are both Server 2012.

I noticed that the DR host has two temp hrl files - one empty, the other small.  As a test, I moved these to a temp directory and tried replication again.  No dice.  I then restarted the Hyper-V service on both servers and it started replicating and generating the temp hrl files again.  Failed again.

Any ideas?  At a loss on this one.  Nothing on Google, and makes no sense since the machines are communicating fine otherwise.
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Question by:dipersp
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by:Cliff Galiher
ID: 39860289
My initial thought is disk space on the host disk partition for that VM.
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Author Comment

by:dipersp
ID: 39860308
80 gigs free.  Only have ~2 gigs to write.
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Expert Comment

by:Cliff Galiher
ID: 39860312
Not for the target (so writing is not yet an issue) but on the source. Hyper-V replica still needs room to make the replica deltas.
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Author Comment

by:dipersp
ID: 39860319
68 gigs there.
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Expert Comment

by:Cliff Galiher
ID: 39860358
Any other partitions close to full when the VM in question is in a running state? System or log partitions could cause similar problems, although it is less common.
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Author Comment

by:dipersp
ID: 39860389
About 100 gigs free on the system partition of both hosts.  These are brand new boxes.  The other four VMs are still replicating just fine.
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dipersp earned 0 total points
ID: 39860455
And I guess sometimes, patience is a virtue.  No idea why, but after 5 hours, it just started working all by itself.  Nothing helpful in the logs.
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Author Closing Comment

by:dipersp
ID: 39869829
Resolved itself.
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