DPM 2010 server 2008r2 x64 with latest hotfixes and Exchange 2010 sp2 On 2008r2 x64. DPM server shows Agent not reachable and Exchange server shows "The DPMRA service terminated unexpectedly. It has done this 42 time(s)". Exchange server also has SCOM. I've removed/reinstalled SCOM and DPM agent on machine and the problem reappears. It works for a day or so, then the problem returns. This is a 3 node cluster.
Relevant part of the dpm logs:
38E8 1DBC 06/29 08:00:58.071 31 vssbaserequestor.cpp(946) [0000000003424EE0] NORMAL QueryStatus
returned 0x4230a, Releasing VssAsync [0000000000543210]
38E8 1DBC 06/29 08:00:58.071 31 vsssnapshotrequestor.cpp(236) [0000000003424EE0] NORMAL CVssSnapshotRequestor::AddComponentForSnapshot
[0000000003424EE0]
38E8 1DBC 06/29 08:00:58.087 31 vsssnapshotrequestor.cpp(347) [0000000003424EE0] NORMAL CVssSnapshotRequestor::AddVolumeForSnapshot
[0000000003424EE0]
38E8 1DBC 06/29 08:00:58.087 03 clusterutil.cpp(1758) WARNING ClusterResourceTypeOpenEnum failed
for resource type Volume Manager Disk Group with windows error 5078
38E8 1DBC 06/29 08:00:58.087 03 clusterutil.cpp(1758) WARNING ClusterResourceTypeOpenEnum failed
for resource type GeoCluster Replicated Disk with windows error 5078
38E8 1DBC 06/29 08:00:58.087 03 clusterutil.cpp(2145) [0000000003BCED50] WARNING Failed: Hr: =
[0x8007001f] Either the volume \\?\Volume{4a99e7db-b66b-49ff-a06c-027ddb29d26a}\ is offline or the volume is not a clustered disk.
38E8 1DBC 06/29 08:00:58.087 31 vsssnapshotrequestor.cpp(379) NORMAL ssLocalVolumeGuid =
[\\?\Volume{4a99e7db-b66b-49ff-a06c-027ddb29d26a}\], ssClusterVolGuid=[\\?\Volume{4a99e7db-b66b-49ff-a06c-027ddb29d26a}\]
38E8 1DBC 06/29 08:00:58.087 31 vsssnapshotrequestor.cpp(390) [0000000003424EE0] NORMAL CVssSnapshotRequestor:
AddVolumeForSnapshot - Marked volume E:\ to be snapshot
38E8 1DBC 06/29 08:00:58.087 31 vsssnapshotrequestor.cpp(424) [0000000003424EE0] NORMAL CVssSnapshotRequestor::StartPrepareForBackup
[0000000003424EE0]