Building Python Real-Time Applications with Storm

Troubleshooting

If the topology doesn't run correctly, review the log files created in the current directory. Errors are often caused by using a version of Storm that does not have a corresponding version of Petrel on the PyPI website (https://pypi.python.org/pypi/petrel). At the time of writing this book, two Storm versions are supported:

• 0.9.3
• 0.9.4

If you are using an unsupported version of Storm, you are likely to see an error similar to one of these:

  File "/home/barry/.virtualenvs/petrel2/lib/python2.7/site-packages/petrel-0.9.3.0.3-py2.7.egg/petrel/cmdline.py", line 19, in get_storm_version
    return m.group(2)
AttributeError: 'NoneType' object has no attribute 'group'

IOError: [Errno 2] No such file or directory: '/home/barry/.virtualenvs/petrel2/lib/python2.7/site-packages/petrel-0.9.3.0.3-py2.7.egg/petrel/generated/storm-petrel-0.10.0-SNAPSHOT.jar' ...