FAQ
We have three topologies running in a single Storm 0.8.1 cluster.
Every few days tuples will stop emitting from bolts and transferred to
bolts in one of the topologies. Storm UI shows Acked and Failed counts
as 0 in Topology Stats. It is as if the communication between bolts
freezes, but there are no error messages in zookeper, supervisor or
worker logs. We suspect the problem might be with ZeroMQ, but don't
know how to confirm this since we could not find a log for ZeroMQ. The
only way to "unfreeze" the topology is to resubmit it, restarting
supervisor did not help. Thanks for your help!

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  • Nathan Marz at Dec 11, 2012 at 12:09 am
    We found a similar issue and believe we fixed the bug for it. Try out
    0.8.2-wip20 which contains the bug fix. Here's the fix and relevant issue:

    https://github.com/nathanmarz/storm/commit/f28c17d9080d5f159f0f9d120f0f5f7646b10980
    https://github.com/nathanmarz/storm/issues/420

    On Mon, Dec 10, 2012 at 1:38 PM, castle2012 wrote:

    We have three topologies running in a single Storm 0.8.1 cluster.
    Every few days tuples will stop emitting from bolts and transferred to
    bolts in one of the topologies. Storm UI shows Acked and Failed counts
    as 0 in Topology Stats. It is as if the communication between bolts
    freezes, but there are no error messages in zookeper, supervisor or
    worker logs. We suspect the problem might be with ZeroMQ, but don't
    know how to confirm this since we could not find a log for ZeroMQ. The
    only way to "unfreeze" the topology is to resubmit it, restarting
    supervisor did not help. Thanks for your help!


    --
    Twitter: @nathanmarz
    http://nathanmarz.com

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postedDec 10, '12 at 11:48p
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