Created attachment 758066 [details]
screenshot of error

Description of problem: Resolving missing hook is showing "Internal Engine Error" for the first time. But the file is actually getting removed from the back-end. However, if we perform the action again, it succeeds in the UI as well.

Following traceback is seen in the vdsm logs:

----------
Thread-135756::DEBUG::2013-06-06 21:06:05,104::BindingXMLRPC::913::vds::(wrapper) client [10.70.36.85]::call hooksList with () {} flowID [2dddf26b]
Thread-135756::DEBUG::2013-06-06 21:06:05,109::BindingXMLRPC::920::vds::(wrapper) return hooksList with {'status': {'message': 'Done', 'code': 0}, 'hooksList': [{'status': 'ENABLED', 'name': '30samba-stop.sh', 'level': 'PRE', 'md5sum': '6589a82125403778c5b23eb60975a49e', 'command': 'stop', 'type': 'text/x-shellscript; charset=us-ascii'}, {'status': 'ENABLED', 'name': '29CTDB-teardown.sh', 'level': 'PRE', 'md5sum': 'c5b3ca8c807d768be881b3c7fd2e4beb', 'command': 'stop', 'type': 'text/x-shellscript; charset=us-ascii'}, {'status': 'ENABLED', 'name': '30samba-start.sh', 'level': 'POST', 'md5sum': '675ee7cf03e125dcacbec3fba523bbfc', 'command': 'start', 'type': 'text/x-shellscript; charset=us-ascii'}, {'status': 'ENABLED', 'name': '29CTDBsetup.sh', 'level': 'POST', 'md5sum': '7eb10305bd3611b04479b90a34fd026b', 'command': 'start', 'type': 'text/x-shellscript; charset=us-ascii'}, {'status': 'ENABLED', 'name': '30samba-set.sh', 'level': 'POST', 'md5sum': 'e1dae56e96326aa8ea26544a3254b748', 'command': 'set', 'type': 'text/x-shellscript; charset=us-ascii'}, {'status': 'ENABLED', 'name': '32binaryhooknew.sh', 'level': 'POST', 'md5sum': '9f38bf50e3d8f709bbd2e9afa0b8b0ee', 'command': 'set', 'type': 'application/x-executable; charset=binary'}, {'status': 'ENABLED', 'name': '33resolvehooktest1.sh', 'level': 'POST', 'md5sum': '1a0b8481099094d97ad35f7668d5ed63', 'command': 'set', 'type': 'text/plain; charset=us-ascii'}]}
Thread-135757::DEBUG::2013-06-06 21:06:05,314::BindingXMLRPC::913::vds::(wrapper) client [10.70.36.85]::call hookRemove with ('set', 'POST', '33resolvehooktest1.sh') {} flowID [1643b709]
Thread-135757::ERROR::2013-06-06 21:06:05,317::BindingXMLRPC::932::vds::(wrapper) unexpected error
Traceback (most recent call last):
  File "/usr/share/vdsm/BindingXMLRPC.py", line 918, in wrapper
    res = f(*args, **kwargs)
  File "/usr/share/vdsm/gluster/api.py", line 32, in wrapper
    rv = func(*args, **kwargs)
  File "/usr/share/vdsm/gluster/api.py", line 251, in hookRemove
    self.svdsmProxy.glusterHookRemove(glusterCmd, hookLevel, hookName)
  File "/usr/share/vdsm/supervdsm.py", line 76, in __call__
    return callMethod()
  File "/usr/share/vdsm/supervdsm.py", line 67, in <lambda>
    **kwargs)
  File "<string>", line 2, in glusterHookRemove
  File "/usr/lib64/python2.6/multiprocessing/managers.py", line 740, in _callmethod
    raise convert_to_error(kind, result)
UnboundLocalError: local variable 'e' referenced before assignment
----------------


Version-Release number of selected component (if applicable):  Red Hat Storage Console Version: 2.1.0-0.bb2.el6rhs 


How reproducible: Always


Steps to Reproduce:
1. Manually create a hook and make sure it got updated in the UI and conflict message will be seen in the Events
2. In the UI, select that hook and click on "Resolve Conflicts
3. Under "Resolve Actions", select the radio button: "Remove the Missing Hook" and click on OK

You will see the error at this point!


Actual results: File is actually getting removed from the RHS node, but the following error is seen in the UI:

---
Error while executing action Remove Gluster Hook: Internal Engine Error
---

However, if you try to perform the same action again, it doesn't show this error in the UI and the action succeeds.

Expected results: The Resolve action should be successful at any point of time.


Additional info: Screenshot attached. vdsm and engine logs will be attached soon.