Exception :VI SDK invoke exception:com.vmware.vim25.GuestOperationsUnavailable

I am trying to push a batch file to a windows 2003 VM and trying to assign a dns to it.

I am using a method GuestProcessManager.listProcessesInGuest, to get the exit code status of the batch file.

Iam getting the following error

2016-11-02 18:26:46.592 SEVERE execute - >Exception :VI SDK invoke exception:com.vmware.vim25.GuestOperationsUnavailable

2016-11-02 18:26:46.592 SEVERE execute - >com.vmware.vim25.ws.WSClient.invoke(WSClient.java:122)

2016-11-02 18:26:46.592 SEVERE execute - >com.vmware.vim25.ws.VimStub.listProcessesInGuest(VimStub.java:4025)

2016-11-02 18:26:46.592 SEVERE execute - >com.vmware.vim25.mo.GuestProcessManager.listProcessesInGuest(GuestProcessManager.java:68)

But if I try after sometime, It seems to be working fine.Any hep on this is greatly appreciated.

public GuestProcessInfo getProcessInfo(VirtualMachine vm, long pid, VMError vmerr) {

    try {

        GuestProcessManager procMgr = getGuestOperationsManager().getProcessManager(vm);

        long[] pids = new long[1];

        pids[0] = pid;

        GuestProcessInfo[] procList = procMgr.listProcessesInGuest(auth, pids);

        if (procList == null || procList.length == 0) {

            mylog.severe("VMAPI: getProcessInfo: Pid " + pid + " no longer running and no status available");

            vmerr.setErrorCode(VMErrorCodes.UDP_EXIT_VMAPI_PROCESS_TERMINATED_ERROR);

            return null;

        }

        return procList[0];

    } catch (Exception e) {

        mylog.severe("VMAPI: Caught exception in getProcessInfo while getting process status for " + pid + " on VM " + vm.getName());

        StringWriter sw = new StringWriter();

        e.printStackTrace(new PrintWriter(sw));

        mylog.severe(sw.toString());

        vmerr.setErrorCode(VMErrorCodes.UDP_EXIT_VMAPI_PROCESSSTATUS_UNKNOWN_ERROR);

        return null;

    }

}

Regards

Shiva