VMCI socket connect() fails repeatedly, then retrieves when tried in a loop

I have a VMCI application that uses a number of VMCI sockets to connect to a guest programs.   I noticed an intermittent failure on 2 of the sockets which seems to be linked to the execution of the connect () /closesocket () in a loop too quickly.

One of the client programs (lets call it customer sock 1) in the prompt will continuously run code that looks roughly similar:

try again every 500ms until we connect to the server VMCI socket.

While (! connected)

{

int retVal = connect(vmciSocket,...);

If (retVal! = 0)

{

Sleep (500);

}

}

until its socket server (server 1 sock) appears, sometime later.  The client can operate for long periods of time to try to connect to the server.

During the execution of customer 1 a second pair of sockets VMCI is created.  Sometimes the client side of the 2nd pair fails to connect with an error (invalid) 100037 WSA.   If put the side customer (customer sock 2) in a loop to try slow it will connect eventually (after about 20 seconds and the failures of 10-15).  The second take of client contains simple to connect, sleep to 5 attempts before leaving logic.

With 1 2 customer the customer end abnormally about 40% of the time with the error logs indicating that he is not able to connect to its server VMCI socket.   If I disable the client 1, the failure rate falls to 10%.

In addition, I noticed that these error matches an error log in my vmware.log.   When these errors I get error that looks like the following:

2012 02-23 T 22: 39:49.751Z | vCPU-0 | I120: VMCI QueuePair: error in BusMemVMCI_InvalidateBPNs for alloc (numInvalidated = 5, numPPNs = 130).
2012 02-23 T 22: 39:50.012Z | vCPU-0 | I120: VMCI QueuePair: error in BusMemVMCI_InvalidateBPNs for alloc (numInvalidated = 123, numPPNs = 130).
2012 02-23 T 22: 39:50.278Z | vCPU-0 | I120: VMCI QueuePair: error in BusMemVMCI_InvalidateBPNs for alloc (numInvalidated = 30, numPPNs = 130).
2012 02-23 T 22: 39:53.640Z | vCPU-0 | I120: VMCI QueuePair: error in BusMemVMCI_InvalidateBPNs for alloc (numInvalidated = 76, numPPNs = 130).
2012 02-23 T 22: 39:56.831Z | vCPU-0 | I120: VMCI QueuePair: error in BusMemVMCI_InvalidateBPNs for alloc (numInvalidated = 90, numPPNs = 130).
2012 02-23 T 22: 39:57.111Z | vCPU-0 | I120: VMCI QueuePair: error in BusMemVMCI_InvalidateBPNs for alloc (numInvalidated = 10 numPPNs = 130).
2012 02-23 T 22: 39:57.374Z | vCPU-0 | I120: VMCI QueuePair: error in BusMemVMCI_InvalidateBPNs for alloc (numInvalidated = 120 numPPNs = 130).
2012 02-23 T 22: 39:57.640Z | vCPU-0 | I120: VMCI QueuePair: error in BusMemVMCI_InvalidateBPNs for alloc (numInvalidated = 42 numPPNs = 130).

He comes to Workstation 8.0.1 for Windows link VMCI 8.0.0 - vmware_vmci_sockets-471780 headers.   Windows 7 in comments and host operating system.

Anyone encountered before or knows a way around?

Hey Kevin,

This can be an interference caused by the VMware SVGA or USB drivers in the comments. Could check you if all the drivers are in use and if disabling one or the other solves the problem?

If one of these drivers, we have unfortunately not a problem as such. The solution is to keep a retry for a while as you already do, or do not use these drivers if possible.

Thank you

Jørgen

Tags: VMware

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