Hit exception from "pyVpx/pyVim/task.py", line 121, in WaitForTask raise http.client.HTTPException: 408 Request Timeout

[li-kai-yuan]

I'm triggering host enter maintenance mode API -> waitForTask via pyvmomi, this task would complete in 24 hour in VC since the heavy load, but watiForTask always fail in 8 hours with below exception

xxx/lib/vsphere/task.py", line 24, in waitTask
    WaitForTask(task)
  File "/usr/lib/python3.7/site-packages/pyVpx/pyVim/task.py", line 121, in WaitForTask
    version, state = GetTaskStatus(task, version, pc)
  File "/usr/lib/python3.7/site-packages/pyVpx/pyVim/task.py", line 244, in GetTaskStatus
    update = pc.WaitForUpdates(version)
  File "/usr/lib/python3.7/site-packages/pyVpx/pyVmomi/VmomiSupport.py", line 556, in <lambda>
    self.f(*(self.args + (obj,) + args), **kwargs)
  File "/usr/lib/python3.7/site-packages/pyVpx/pyVmomi/VmomiSupport.py", line 368, in _InvokeMethod
    return self._stub.InvokeMethod(self, info, args)
  File "/usr/lib/python3.7/site-packages/pyVpx/pyVmomi/SoapAdapter.py", line 1484, in InvokeMethod
    raise six.moves.http_client.HTTPException("%d %s" % (resp.status, resp.reason))
http.client.HTTPException: 408 Request Timeout

Could you help provide some insight about this issue and how to fix it? Thanks.

[foxliu]

you can try to rewrite the function WaitForTask and on line 189 use WaitForUpdatesEx instead of WaitForUpdates

try:
        version, state = None, None

        # Loop looking for updates till the state moves to a completed state.
        while len(progressUpdaters):
            update = pc.WaitForUpdates(version)
            for filterSet in update.filterSet:
                for objSet in filterSet.objectSet:
                    task = objSet.obj
                    taskId = str(task)
                    for change in objSet.changeSet:
                        if change.name == 'info':
                            state = change.val.state
                        elif change.name == 'info.state':
                            state = change.val
                        else:
                            continue

                        progressUpdater = progressUpdaters.get(taskId)
                        if not progressUpdater:
                            continue

                        if state == vim.TaskInfo.State.success:
                            progressUpdater.Update('completed')
                            progressUpdaters.pop(taskId)
                            # cache the results, as task objects could expire if one
                            # of the tasks take a longer time to complete
                            results.append(task.info.result)
                        elif state == vim.TaskInfo.State.error:
                            err = task.info.error
                            progressUpdater.Update('error: %s' % str(err))
                            if raiseOnError:
                                raise err
                            else:
                                print("Task %s reported error: %s" % (taskId, str(err)))
                                progressUpdaters.pop(taskId)
                        else:
                            if onProgressUpdate:
                                progressUpdater.UpdateIfNeeded()
            # Move to next version
            version = update.version

the api doc https://code.vmware.com/apis/42/vsphere/doc/vmodl.query.PropertyCollector.html#waitForUpdates