Bug #72044 MysqlFabric exception when using dump sharding_information with no shards
Submitted: 15 Mar 2014 0:23 Modified: 26 Apr 2016 19:05
Reporter: Andres Eduardo Sanchez Rodriguez Email Updates:
Status: Closed Impact on me:
Category:MySQL Fabric Severity:S3 (Non-critical)
Version:1.4.2 OS:Linux (2.6.39-200.24.1.el6uek.x86_64)
Assigned to: CPU Architecture:Any

[15 Mar 2014 0:23] Andres Eduardo Sanchez Rodriguez
An exception is thrown by dump sharding_information commands when no shards are inside a definition / setup.

How to repeat:
1.- Check dump sharding information commands.

bash-4.1$ mysqlfabric dump sharding_information
Command :
{ success     = True
  return      = [0, 0, 1, [['oltp', 'oltp', 'emp_no', '30001', '2', 'RANGE', 'my_group2', 'my_group4']]]
  activities  =

2.- Ensure no shards remain in setup, if they are remove them

-bash-4.1$ mysqlfabric sharding disable_shard 2
Procedure :
{ uuid        = ed0ddb21-2c96-47a6-ba53-39c6308057d1,
  finished    = True,
  success     = True,
  return      = True,
  activities  =
-bash-4.1$ mysqlfabric sharding remove_shard 2
Procedure :
{ uuid        = 4c0d04fb-a8ba-4d26-99fb-d432c7103518,
  finished    = True,
  success     = True,
  return      = True,
  activities  =

3.- Try dump sharding_information and you will get an exception
-bash-4.1$ mysqlfabric dump sharding_information
Traceback (most recent call last):
  File "/usr/bin/mysqlfabric", line 427, in <module>
  File "/usr/bin/mysqlfabric", line 410, in main
    fire_command(cmd, *cargs)
  File "/usr/bin/mysqlfabric", line 343, in fire_command
    result = command.dispatch(*(command.append_options_to_args(args)))
  File "/usr/lib/python2.6/site-packages/mysql/fabric/command.py", line 356, in dispatch
    status = self.client.dispatch(self, *args)
  File "/usr/lib/python2.6/site-packages/mysql/fabric/protocols/xmlrpc.py", line 717, in dispatch
    return getattr(self, reference)(*args)
  File "/usr/lib64/python2.6/xmlrpclib.py", line 1199, in __call__
    return self.__send(self.__name, args)
  File "/usr/lib64/python2.6/xmlrpclib.py", line 1489, in __request
  File "/usr/lib/python2.6/site-packages/mysql/fabric/protocols/xmlrpc.py", line 663, in request
    return self.parse_response(result)
  File "/usr/lib64/python2.6/xmlrpclib.py", line 1361, in parse_response
    return self._parse_response(file, None)
  File "/usr/lib64/python2.6/xmlrpclib.py", line 1392, in _parse_response
    return u.close()
  File "/usr/lib64/python2.6/xmlrpclib.py", line 838, in close
    raise Fault(**self._stack[0])
xmlrpclib.Fault: <Fault 1: "<type 'exceptions.TypeError'>:cannot marshal None unless allow_none is enabled">

Suggested fix:
Message indicating no shard exist should be prompted.
[17 Mar 2014 13:46] Mats Kindahl
Thank you for the bug report. Verified as described.