Getting java.lang.IllegalStateException : Failed to create merged beam

Hi,

I am getting the below error while posting data to tranquility-server. Could some one point me to what it might be related too ?

2016-09-07 13:03:17,786 [qtp424918165-25] WARN c.m.t.server.http.TranquilityServlet - Server error serving request to http://localhost:8200/v1/post/metrics

java.lang.IllegalStateException: Failed to create merged beam: druid:overlord/metrics

at com.metamx.tranquility.beam.ClusteredBeam$$anonfun$sendAll$2$$anonfun$26.apply(ClusteredBeam.scala:383) ~[io.druid.tranquility-core-0.8.2.jar:0.8.2]

at com.metamx.tranquility.beam.ClusteredBeam$$anonfun$sendAll$2$$anonfun$26.apply(ClusteredBeam.scala:379) ~[io.druid.tranquility-core-0.8.2.jar:0.8.2]

at com.twitter.util.Promise$Transformer.liftedTree1$1(Promise.scala:112) ~[com.twitter.util-core_2.11-6.30.0.jar:6.30.0]

at com.twitter.util.Promise$Transformer.k(Promise.scala:112) ~[com.twitter.util-core_2.11-6.30.0.jar:6.30.0]

at com.twitter.util.Promise$Transformer.apply(Promise.scala:122) ~[com.twitter.util-core_2.11-6.30.0.jar:6.30.0]

at com.twitter.util.Promise$Transformer.apply(Promise.scala:103) ~[com.twitter.util-core_2.11-6.30.0.jar:6.30.0]

at com.twitter.util.Promise$$anon$1.run(Promise.scala:366) ~[com.twitter.util-core_2.11-6.30.0.jar:6.30.0]

at com.twitter.concurrent.LocalScheduler$Activation.run(Scheduler.scala:178) ~[com.twitter.util-core_2.11-6.30.0.jar:6.30.0]

at com.twitter.concurrent.LocalScheduler$Activation.submit(Scheduler.scala:136) ~[com.twitter.util-core_2.11-6.30.0.jar:6.30.0]

at com.twitter.concurrent.LocalScheduler.submit(Scheduler.scala:207) ~[com.twitter.util-core_2.11-6.30.0.jar:6.30.0]

at com.twitter.concurrent.Scheduler$.submit(Scheduler.scala:92) ~[com.twitter.util-core_2.11-6.30.0.jar:6.30.0]

at com.twitter.util.Promise.runq(Promise.scala:350) ~[com.twitter.util-core_2.11-6.30.0.jar:6.30.0]

at com.twitter.util.Promise.updateIfEmpty(Promise.scala:721) ~[com.twitter.util-core_2.11-6.30.0.jar:6.30.0]

at com.twitter.util.ExecutorServiceFuturePool$$anon$2.run(FuturePool.scala:107) ~[com.twitter.util-core_2.11-6.30.0.jar:6.30.0]

at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) ~[na:1.8.0_60]

at java.util.concurrent.FutureTask.run(FutureTask.java:266) ~[na:1.8.0_60]

at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) ~[na:1.8.0_60]

at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) ~[na:1.8.0_60]

at java.lang.Thread.run(Thread.java:745) [na:1.8.0_60]

Caused by: java.lang.IllegalStateException: Failed to save new beam for identifier[druid:overlord/metrics] timestamp[2016-09-07T12:00:00.000Z]

at com.metamx.tranquility.beam.ClusteredBeam$$anonfun$2.applyOrElse(ClusteredBeam.scala:289) ~[io.druid.tranquility-core-0.8.2.jar:0.8.2]

at com.metamx.tranquility.beam.ClusteredBeam$$anonfun$2.applyOrElse(ClusteredBeam.scala:286) ~[io.druid.tranquility-core-0.8.2.jar:0.8.2]

at com.twitter.util.Future$$anonfun$rescue$1.apply(Future.scala:924) ~[com.twitter.util-core_2.11-6.30.0.jar:6.30.0]

at com.twitter.util.Future$$anonfun$rescue$1.apply(Future.scala:922) ~[com.twitter.util-core_2.11-6.30.0.jar:6.30.0]

Actual error is :
Caused by: java.nio.channels.UnresolvedAddressException: null

at sun.nio.ch.Net.checkAddress(Net.java:101) ~[na:1.8.0_60]

at sun.nio.ch.SocketChannelImpl.connect(SocketChannelImpl.java:622) ~[na:1.8.0_60]

I am not able to get which property it is referring to.