KeyError: 'lastEventTimestamp'

[Miserlou]

Happened while tailing..

tailing logs...
Traceback (most recent call last):
  File "/Projects/lambdas/python/env/bin/kappa", line 155, in <module>
    cli(obj={})
  File "/Projects/lambdas/python/env/lib/python2.7/site-packages/click/core.py", line 664, in __call__
    return self.main(*args, **kwargs)
  File "/Projects/lambdas/python/env/lib/python2.7/site-packages/click/core.py", line 644, in main
    rv = self.invoke(ctx)
  File "/Projects/lambdas/python/env/lib/python2.7/site-packages/click/core.py", line 991, in invoke
    return _process_result(sub_ctx.command.invoke(sub_ctx))
  File "/Projects/lambdas/python/env/lib/python2.7/site-packages/click/core.py", line 837, in invoke
    return ctx.invoke(self.callback, **ctx.params)
  File "/Projects/lambdas/python/env/lib/python2.7/site-packages/click/core.py", line 464, in invoke
    return callback(*args, **kwargs)
  File "/Projects/lambdas/python/env/bin/kappa", line 89, in tail
    for e in context.tail()[-10:]:
  File "/Projects/lambdas/python/env/lib/python2.7/site-packages/kappa/context.py", line 150, in tail
    return self.function.tail()
  File "/Projects/lambdas/python/env/lib/python2.7/site-packages/kappa/function.py", line 97, in tail
    return self.log.tail()
  File "/Projects/lambdas/python/env/lib/python2.7/site-packages/kappa/log.py", line 57, in tail
    elif stream['lastEventTimestamp'] > latest_stream['lastEventTimestamp']:
KeyError: 'lastEventTimestamp'

Normally works fine, not sure why it happened those few times. Cleared up shortly with no other changes. Just thought you should be aware.

[Miserlou]

This was happening to me enough that I just went ahead and fixed it for my own usage. Merge if it suits you, comments welcome.