Socket Error 10055 (4034555)

Socket Error 10055

Socket Error 10055

Upon attempting a backup on a given agent (usually Windows 2003) an error is received like the one below:

Error Socket error 10055
An operation on a socket could not be performed because the system lacked sufficient buffer space or because a queue was full

System.AggregateException: One or more errors occurred. ---> System.AggregateException: One or more volume stream readers failed ---> System.Net.Sockets.SocketException: An operation on a socket could not be performed because the system lacked sufficient buffer space or because a queue was full
at System.Net.Sockets.Socket.Receive(Byte[] buffer, Int32 offset, Int32 size, SocketFlags socketFlags)
at Replay.Core.Implementation.Transfer.VolumeTransferDataConnection.ReadData(Byte[] buffer, Int32 offsetIntoBuffer, Int32 maxBytesToRead)
at Replay.Core.Implementation.Transfer.VolumeDataReaderStream.HandleResponse(TransferDataIORequest ioRequest)
at Replay.Core.Implementation.Transfer.VolumeDataReaderStream.HandleQueuedResponse()
at Replay.Core.Implementation.Transfer.VolumeDataReaderStream.ProcessIoRequestWithQueuing(TransferDataIORequest ioRequest)
at Replay.Core.Implementation.Transfer.VolumeDataReaderStream.ProcessIoRequestsWithQueueing(Int32 initialQueueSize)
at System.Threading.Tasks.Task.Execute()
--- End of inner exception stack trace ---

Error 10055 means that Windows has run out of TCP/IP socket buffers because too many connections are open at once.

1. Apply this hotfix on Agent http://support.microsoft.com/kb/833167

2. Perform chkdsk on all volumes

3. Open command prompt and type:
vssadmin add shadowstorage /For=F: /On=F: /Maxsize=unbounded

4. Change receive buffers to 512 for NIC (on Core-Agent)
http://alliedtelesis.com/manuals/at2911GP/Images/ah106834.jpg

5. Do steps from resolution on agent
http://support.microsoft.com/kb/196271

6. After all steps are complete restart agent and force snap again

AppAssure SFDC Solution Number: 00001825