Github user jburwell commented on a diff in the pull request:

    https://github.com/apache/cloudstack/pull/798#discussion_r79315898
  
    --- Diff: 
plugins/hypervisors/vmware/src/com/cloud/hypervisor/vmware/manager/VmwareStorageManagerImpl.java
 ---
    @@ -1464,4 +1448,55 @@ private String deleteDir(String dir) {
         private static String getVolumeRelativeDirInSecStroage(long volumeId) {
             return "volumes/" + volumeId;
         }
    +
    +    /**
    +     * This method is to check if a given TaskInfo Object is valid( and 
has name and entity name assigned).It return true if TaskInfo Object is valid 
and false otherwise.
    +     *
    +     * @param TaskInfo
    +     *        info
    +     * @return boolean(true or false)
    +     **/
    +    private boolean isvalidTaskInfoObj(TaskInfo info){
    +        return !(info == null || info.getEntityName() == null || 
info.getName() == null);
    +    }
    +    
    +    /**
    +     * This method waits for tasks running on vm to complete
    +     *
    +     * @param vmName        Name of the vm
    +     * @param taskName      Name of the task
    +     * @param context       Task context object
    +     * 
    +     * @return boolean(true or false)   True if it waited for tasks to 
finish and false when there are no tasks running on the Vm.
    +     **/
    +     
    +    private boolean waitForRunningTaskOnVM(String vmName, String taskName, 
VmwareContext context) throws Exception {
    +        try {
    +            ManagedObjectReference taskmgr = 
context.getServiceContent().getTaskManager();
    +            List<ManagedObjectReference> tasks = 
context.getVimClient().getDynamicProperty(taskmgr, "recentTask");
    +
    +            for (ManagedObjectReference taskMor : tasks) {
    +                TaskInfo info = 
(TaskInfo)(context.getVimClient().getDynamicProperty(taskMor, "info"));
    +
    +                if (!isvalidTaskInfoObj(info)) {
    +                    continue;
    +                }
    +
    +                if (info.getEntityName().equals(vmName) && 
info.getName().equalsIgnoreCase(taskName)) {
    +                    if (!(info.getState().equals(TaskInfoState.SUCCESS) || 
info.getState().equals(TaskInfoState.ERROR))) {
    +                        s_logger.debug("There is already a task: " + 
taskName + " running for VM: " + vmName + ", wait for it");
    --- End diff --
    
    Please wrap this statement in an `if (s_logger.isDebugEnabled())` check.


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