Github user srdo commented on the pull request:
https://github.com/apache/storm/pull/1340#issuecomment-219992956
It's not strictly necessary, no. It's just an alternate way of looking up
leaders that avoids the concurrency issue when looking up the leader in
Zookeeper. As a side effect, it may give more informative error logs when the
metadata API returns errors, than being told that a node in Zookeeper is
missing.
Yes, the RuntimeExceptions will crash the worker. I put them in before
realizing that refresh was called periodically. I could replace them with error
logs?
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