com.twitter.finagle.NoBrokersAvailableException: No hosts are available for disco!firehose:druid:ove

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narendra...@gmail.com

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Sep 30, 2016, 7:03:58 PM9/30/16
to Druid User
Hi All,

I am getting below error

i have read it in other blog this same issues but not getting exact reason for this what casing this error 

2016-09-30 21:36:51,098 [Hashed wheel timer #1] WARN  c.m.tranquility.beam.ClusteredBeam - Emitting alert: [anomaly] Failed to propagate events: druid:overlord/test_topic
{
  "eventCount" : 1,
  "timestamp" : "2016-09-30T21:00:00.000Z",
  "beams" : "MergingPartitioningBeam(DruidBeam(interval = 2016-09-30T21:00:00.000Z/2016-09-30T22:00:00.000Z, partition = 0, tasks = [index_realtime_test_topic_2016-09-30T21:00:00.000Z_0_0/test_topic-021-0000-0000; index_realtime_test_topic_2016-09-30T21:00:00.000Z_0_1/test_topic-021-0000-0001]), DruidBeam(interval = 2016-09-30T21:00:00.000Z/2016-09-30T22:00:00.000Z, partition = 1, tasks = [index_realtime_test_topic_2016-09-30T21:00:00.000Z_1_0/test_topic-021-0001-0000; index_realtime_test_topic_2016-09-30T21:00:00.000Z_1_1/test_topic-021-0001-0001]))"
}

com.twitter.finagle.NoBrokersAvailableException: No hosts are available for disco!firehose:druid:overlord:test-prachi-021-0001-0000, Dtab.base=[], Dtab.local=[]

at com.twitter.finagle.NoStacktrace(Unknown Source) ~[na:na]

Thanks,
Narendra

Nishant Bangarwa

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Oct 4, 2016, 10:41:26 AM10/4/16
to Druid User
Above error means that there are no corresponding druid tasks running for the tranquility beam. 
There can be multiple reasons for task failures, most common is a configuration error causing tasks to fail during initialization. 
Check your task status and logs from druid overlord for the exact cause for failure. 

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