We are currently running Avamar Server 6.0.2.153 and we continually see our SharePoint backup fail from time-to-time.  The backups fail with error code 10007 and if you look in the logs you will see the following is the culprit:

2013-04-17 22:29:38 avmossvss Info <0000>: Waiting for [FOCUS-SPDB1] to finish browsing ...

2013-04-17 22:39:23 avmossvss Error <12001>:

  - Timeout waiting for a browse response from back-end client 'FOCUS-SPDB1'

  2013-04-17 22:39:23 avmossvss Warning <12001>:

We are running SharePoint 2010 on Windows 2008R2.  All avamar clients on our SharePoint servers are version 6.0.x.  Our SharePoint topology consists of a single web front end server, single application server and single database server running SQL 2008R2 (FOCUS-SPDB1).  We currently have the Windows File System and Windows VSS jobs run on these servers at 8:00PM. These jobs are normally done by 9:00PM and are always complete.  The Windows SharePoint VSS backup job that runs on our Web Front End server is scheduled to run at 10:00 PM.  This job will either never start, from the perspective of the Progress Bytes will be 0 or it will start and then fail.

Our database server is never starved for CPU but sometimes can run a little low on memory, low being that there is 300-500MB of free memory.

Any insight into how to begin troubleshooting this issue?

Thanks

Ken