Hans Zeller created TRAFODION-3220:
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Summary: Extend the existing compiler GUI to display query
execution as well
Key: TRAFODION-3220
URL: https://issues.apache.org/jira/browse/TRAFODION-3220
Project: Apache Trafodion
Issue Type: New Feature
Components: sql-exe
Affects Versions: 2.3
Reporter: Hans Zeller
Assignee: Hans Zeller
Fix For: 2.4
There have been several occasions where I wished we had a GUI debugging tool
for the executor that allows to single-step through work method calls and that
allows us to control multiple ESPs, so we can reproduce distributed situations
like "late cancel". It turns out this is relatively easy to do, so I'm planning
to submit a PR for this feature soon.
The GUI will have one window for every fragment instance (the master fragment
instance and then one for each ESP fragment instance). This window will allow
to step one subtask (work method invocation, see class ExSubtask) at a time, or
it will allow to set breakpoints at specific subtasks, or one can resume the
instance without the GUI. I'm also adding a very primitive queue display, but
that will need more work, in the first version it won't be possible to look at
the data in the executor queues.
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