z50hz1988 commented on issue #1448: Transient error - Unable to push events to task / NoBrokersAvailableException URL: https://github.com/apache/incubator-druid/issues/1448#issuecomment-444816561 > I am also getting same error after restarting tranquility > > Sep 12, 2016 9:22:18 PM com.twitter.finagle.Init$$anonfun$1 apply$mcV$sp > INFO: Finagle version 6.31.0 (rev=50d3bb0eea5ad3ed332111d707184c80fed6a506) built at 20151203-164135 > 2016-09-12 21:22:19,161 [ClusteredBeam-ZkFuturePool-ae2959c9-8f0c-4379-88d3-c4841aeaa647] INFO c.m.c.s.net.finagle.DiscoResolver - Updating instances for service[druid:overlord] to Set() > 2016-09-12 21:22:19,278 [ClusteredBeam-ZkFuturePool-ae2959c9-8f0c-4379-88d3-c4841aeaa647] INFO c.m.t.finagle.FinagleRegistry - Created client for service: disco!druid:overlord > 2016-09-12 21:22:19,359 [ClusteredBeam-ZkFuturePool-ae2959c9-8f0c-4379-88d3-c4841aeaa647] WARN c.m.tranquility.finagle.FutureRetry$ - Transient error, will try again in 16,843 ms > com.twitter.finagle.NoBrokersAvailableException: No hosts are available for disco!druid:overlord, Dtab.base=[], Dtab.local=[] > at com.twitter.finagle.NoStacktrace(Unknown Source) ~[na:na] > 2016-09-12 21:22:19,370 [ClusteredBeam-ZkFuturePool-ae2959c9-8f0c-4379-88d3-c4841aeaa647] INFO com.metamx.common.scala.control$ - Creating druid indexing task (service = druid:overlord): { have you solved this problem ? I got the same problem just like yours, and I connected my zookeeper server ls the path '/druid/discovery/druid:overlord', the result is '[]' , it's empty, and I check the log of overlord, there is some error about metadata storage service connection refused, I changed Druid metadata storage type from derby to mysql and restart all components; but the value of '/druid/discovery/druid:overlord' path is still '[]' ; do you have any idea ? thanks a lot.
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