Created attachment 807563 [details]
screenshot

Description of problem:
------------------------
Creation of volume from the Console, fails with an error pop-up which says the following - 

Error while executing action Create Gluster Volume: Network error during communication with the Host.

All nodes were up and running while this happened. When I tried again, the volume creation again failed with the error that the brick specified for this volume, is already part of another volume.

The following is seen in the vdsm logs -

Thread-2561::ERROR::2013-10-04 05:45:31,443::BindingXMLRPC::990::vds::(wrapper) vdsm exception occured
Traceback (most recent call last):
  File "/usr/share/vdsm/BindingXMLRPC.py", line 979, in wrapper
    res = f(*args, **kwargs)
  File "/usr/share/vdsm/gluster/api.py", line 53, in wrapper
    rv = func(*args, **kwargs)
  File "/usr/share/vdsm/gluster/api.py", line 84, in volumeCreate
    transportList)
  File "/usr/share/vdsm/supervdsm.py", line 50, in __call__
    return callMethod()
  File "/usr/share/vdsm/supervdsm.py", line 48, in <lambda>
    **kwargs)
  File "<string>", line 2, in glusterVolumeCreate
  File "/usr/lib64/python2.6/multiprocessing/managers.py", line 740, in _callmethod
    raise convert_to_error(kind, result)
GlusterVolumeCreateFailedException: <unprintable GlusterVolumeCreateFailedException object>


The following is seen in the engine logs -

2013-10-04 05:45:32,114 ERROR [org.ovirt.engine.core.vdsbroker.gluster.CreateGlusterVolumeVDSCommand] (ajp-/127.0.0.1:8702-3) Command CreateGlusterVolumeVDS execution failed. Exception: VDSNetworkException: 
org.apache.xmlrpc.XmlRpcException: <type 'exceptions.TypeError'>:sequence item 0: expected string, NoneType found
2013-10-04 05:45:32,114 INFO  [org.ovirt.engine.core.vdsbroker.gluster.CreateGlusterVolumeVDSCommand] (ajp-/127.0.0.1:8702-3) FINISH, CreateGlusterVolumeVDSCommand, log id: 3caa49d9
2013-10-04 05:45:32,114 ERROR [org.ovirt.engine.core.bll.gluster.CreateGlusterVolumeCommand] (ajp-/127.0.0.1:8702-3) Command org.ovirt.engine.core.bll.gluster.CreateGlusterVolumeCommand throw Vdc Bll excepti
on. With error message VdcBLLException: org.ovirt.engine.core.vdsbroker.vdsbroker.VDSNetworkException: org.apache.xmlrpc.XmlRpcException: <type 'exceptions.TypeError'>:sequence item 0: expected string, NoneT
ype found (Failed with error VDS_NETWORK_ERROR and code 5022)


Version-Release number of selected component (if applicable):
Red Hat Storage Console Version: 2.1.1-0.0.2.master.el6ev 

How reproducible:
Intermittent

Steps to Reproduce:
1. Try to create a pure distribute volume from the Console.
2. After adding the bricks click on OK in the Create Volume dialog.

Actual results:
Volume creation fails with the above explained error.

Expected results:
Volume creation should succeed.

Additional info:
Find attached screenshots of both errors and engine logs, vdsm logs and glusterd logs.