[GitHub] [incubator-heron] nicknezis commented on pull request #3831: Added to show the number of instances in the topology list UI.

[GitBox <gi...@apache.org>]

nicknezis commented on PR #3831:
URL: https://github.com/apache/incubator-heron/pull/3831#issuecomment-1126842868

   I might have missed something, but got the following error when attempting a local run.
   
   Installed locally:
   `bazel run -- scripts/packages:heron-install.sh --user`
   
   I ran `heron-tracker` and `heron-ui`.
   
   Ran a local topology: `heron submit local ~/.heron/examples/heron-api-examples.jar org.apache.heron.examples.api.AckingTopology acking`
   
   Saw this error in the `heron-tracker`.
   ```
   [2022-05-14 22:03:39 -0400] [INFO]: Adding new topology: acking, state_manager: local
   Exception in thread Thread-1:
   Traceback (most recent call last):
     File "/usr/local/Cellar/python@3.9/3.9.12/Frameworks/Python.framework/Versions/3.9/lib/python3.9/threading.py", line 973, in _bootstrap_inner
       self.run()
     File "/usr/local/Cellar/python@3.9/3.9.12/Frameworks/Python.framework/Versions/3.9/lib/python3.9/threading.py", line 910, in run
       self._target(*self._args, **self._kwargs)
     File "/Users/nnezis/.pex/unzipped_pexes/bca9046b34d3961d3cc495fabd3817f4243df382/heron/statemgrs/src/python/filestatemanager.py", line 133, in monitor
       trigger_watches_based_on_files(
     File "/Users/nnezis/.pex/unzipped_pexes/bca9046b34d3961d3cc495fabd3817f4243df382/heron/statemgrs/src/python/filestatemanager.py", line 112, in trigger_watches_based_on_files
       callback(proto_object)
     File "/Users/nnezis/.pex/unzipped_pexes/bca9046b34d3961d3cc495fabd3817f4243df382/heron/tools/tracker/src/python/topology.py", line 626, in set_execution_state
       self._update(execution_state=execution_state)
     File "/Users/nnezis/.pex/unzipped_pexes/bca9046b34d3961d3cc495fabd3817f4243df382/heron/tools/tracker/src/python/topology.py", line 609, in _update
       info = self._rebuild_info(t_state)
     File "/Users/nnezis/.pex/unzipped_pexes/bca9046b34d3961d3cc495fabd3817f4243df382/heron/tools/tracker/src/python/topology.py", line 278, in _rebuild_info
       metadata=self._build_metadata(topology, physical_plan, execution_state, tracker_config),
     File "/Users/nnezis/.pex/unzipped_pexes/bca9046b34d3961d3cc495fabd3817f4243df382/heron/tools/tracker/src/python/topology.py", line 395, in _build_metadata
       "instances": len(physical_plan.instances),
   AttributeError: 'NoneType' object has no attribute 'instances'
   ```
   
   Is it possible that I'm not running the right binary of `heron-tracker`? I'll try to verify what I did, but wanted to post just in case before this got merged in.


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