Uploaded image for project: 'Hue (READ ONLY)'
  1. Hue (READ ONLY)
  2. HUE-9348

LLAP editor unable to access beeswax cached tez sessions


    • Type: Bug
    • Status: Closed
    • Priority: Major
    • Resolution: Incomplete
    • Affects Version/s: 4.7.0
    • Fix Version/s: None
    • Component/s: con.hive
    • Labels:
    • Environment:



      In debugging the code a bit more, I found the issue related to how the LLAP editor check for existing session to use for running its query.
      The file having issue is:/usr/hdp/current/hue/desktop/libs/notebook/src/notebook/connectors/hiveserver2.py
      And specifically this function:
      def _get_session_by_id(self, notebook, type='hive'):
      session = self._get_session(notebook, type)
      if session:
      session_id = session.get('id')
      if session_id:
      filters = {'id': session_id, 'application': 'beeswax' if type == 'hive' else type}
      if not is_admin(self.user):
      filters['owner'] = self.user
      return Session.objects.get(**filters)
      The line session = self._get_session(notebook, type), returns an active session id. 
      But when the execution hits line return Session.objects.get(**filters), it can't find an active session with that session_id and type llap.
      There seem to be a bug in Hue where all hive sessions, HS2 and LLAP, are stored in Session object under type beeswax. That is why when looking for that session_id and type llap it can't find it.
      And it throws the exception below.
      Traceback (most recent call last):

        File "/usr/hdp/current/hue/desktop/libs/notebook/src/notebook/decorators.py", line 114, in wrapper

          return f(*args, **kwargs)

        File "/usr/hdp/current/hue/desktop/libs/notebook/src/notebook/api.py", line 222, in execute

          response = _execute_notebook(request, notebook, snippet)

        File "/usr/hdp/current/hue/desktop/libs/notebook/src/notebook/api.py", line 153, in _execute_notebook

          response['handle'] = interpreter.execute(notebook, snippet)

        File "/usr/hdp/current/hue/desktop/libs/notebook/src/notebook/connectors/hiveserver2.py", line 98, in decorator

          return func(*args, **kwargs)

        File "/usr/hdp/current/hue/desktop/libs/notebook/src/notebook/connectors/hiveserver2.py", line 294, in execute

          _session = self._get_session_by_id(notebook, snippet['type'])

        File "/usr/hdp/current/hue/desktop/libs/notebook/src/notebook/connectors/hiveserver2.py", line 675, in _get_session_by_id

          ss = Session.objects.get(**filters)

        File "/usr/hdp/current/hue/build/env/lib/python2.7/site-packages/Django-1.11.29-py2.7.egg/django/db/models/manager.py", line 85, in manager_method

          return getattr(self.get_queryset(), name)(*args, **kwargs)

        File "/usr/hdp/current/hue/build/env/lib/python2.7/site-packages/Django-1.11.29-py2.7.egg/django/db/models/query.py", line 380, in get


      DoesNotExist: Session matching query does not exist.

      In order to make it work, I had to change the line filters = {'id': session_id, 'application': 'beeswax' if type == 'hive' else type} to filters = {'id': session_id, 'application': 'beeswax' if type == 'hive' or type == 'llap' else type}




            • Assignee:
              theyaa Theyaa Matti
            • Votes:
              0 Vote for this issue
              2 Start watching this issue


              • Created: