Catching TypeErrors to expose swarm failure errors.

[rhyolight]

Fixes #1815.

[numenta-ci]

By analyzing the blame information on this pull request, we identified @rcrowder, @mrcslws and @mihail911 to be potential reviewers

[rhyolight]

@scottpurdy

[scottpurdy]

TypeError derives from Exception so I don't think this change will have an effect. I'm usually all for using more specific types and removing the broad Exception checks but in this case I think the intent is to catch all exceptions.

[rhyolight]

@scottpurdy I don't understand how a TypeError is slipping out of this try clause!

    try:
      results = json.loads(jobInfo.results)
    except Exception, e:
      print "json.loads(jobInfo.results) raised an exception.  " \
            "Here is some info to help with debugging:"
      print "jobInfo: ", jobInfo
      print "jobInfo.results: ", jobInfo.results
      print "EXCEPTION: ", e
      raise

[scottpurdy]

@rhyolight - My understanding is that that isn't possible...

[rhyolight]

@scottpurdy It might not be possible, but I've seen it happen several times.

[rhyolight]

@scottpurdy I'll work on replicating...

[rhyolight]

@scottpurdy You are right, the TypeError is getting caught and simply re-raised.

[scottpurdy]

All, I could see that being confusing to debug haha.