Connection refused error in Storm

I am new in Storm.. I am stucked with below error

java.net.ConnectException: Connection refused
    at sun.nio.ch.SocketChannelImpl.checkConnect(Native Method)
    at sun.nio.ch.SocketChannelImpl.finishConnect(SocketChannelImpl.java:599)
    at org.apache.zookeeper.ClientCnxn$SendThread.run(ClientCnxn.java:1119)
1178482 [Thread-11-SendThread(localhost:2000)] WARN  org.apache.zookeeper.ClientCnxn  - Session 0x1417cd58578000b for server null, unexpected error, closing socket connection and attempting reconnect

Sometimes my topology works fine but when i tried again i got above error.Searched a lot in google but could nt find any clue. I am running my topology in local cluster.. please suggest some solutions

Please find more logs below :-

2595 [Thread-11-EventThread] INFO  com.netflix.curator.framework.state.ConnectionStateManager  - State change: SUSPENDED
2596 [Thread-11-EventThread] WARN  backtype.storm.cluster  - Received event :disconnected::none: with disconnected Zookeeper.
2596 [ConnectionStateManager-0] WARN  com.netflix.curator.framework.state.ConnectionStateManager  - There are no ConnectionStateListeners registered.
3592 [Thread-11-SendThread(localhost:2000)] WARN  org.apache.zookeeper.ClientCnxn  - Session 0x1417e6596c7000b for server null, unexpected error, closing socket connection and attempting reconnect
java.net.ConnectException: Connection refused
    at sun.nio.ch.SocketChannelImpl.checkConnect(Native Method)
    at sun.nio.ch.SocketChannelImpl.finishConnect(SocketChannelImpl.java:599)
    at org.apache.zookeeper.ClientCnxn$SendThread.run(ClientCnxn.java:1119)
3895 [Thread-11-SendThread(localhost:2000)] WARN  org.apache.zookeeper.ClientCnxn  - Session 0x1417e6596c7000b for server null, unexpected error, closing socket connection and attempting reconnect
org.apache.zookeeper.KeeperException$ConnectionLossException: KeeperErrorCode = ConnectionLoss
    at org.apache.zookeeper.KeeperException.create(KeeperException.java:90)
    at com.netflix.curator.framework.imps.CuratorFrameworkImpl.processBackgroundOperation(CuratorFrameworkImpl.java:380)
    at com.netflix.curator.framework.imps.BackgroundSyncImpl$1.processResult(BackgroundSyncImpl.java:49)
    at org.apache.zookeeper.ClientCnxn$EventThread.processEvent(ClientCnxn.java:617)
    at org.apache.zookeeper.ClientCnxn$EventThread.run(ClientCnxn.java:506)

Please find more log :-

java.net.ConnectException: Connection refused
    at sun.nio.ch.SocketChannelImpl.checkConnect(Native Method)
    at sun.nio.ch.SocketChannelImpl.finishConnect(SocketChannelImpl.java:599)
    at org.apache.zookeeper.ClientCnxn$SendThread.run(ClientCnxn.java:1119)
50454 [Thread-15] ERROR com.netflix.curator.ConnectionState  - Connection timed out
org.apache.zookeeper.KeeperException$ConnectionLossException: KeeperErrorCode = ConnectionLoss
    at com.netflix.curator.ConnectionState.getZooKeeper(ConnectionState.java:72)
    at com.netflix.curator.CuratorZookeeperClient.getZooKeeper(CuratorZookeeperClient.java:74)
    at com.netflix.curator.framework.imps.CuratorFrameworkImpl.getZooKeeper(CuratorFrameworkImpl.java:353)
    at com.netflix.curator.framework.imps.ExistsBuilderImpl$2.call(ExistsBuilderImpl.java:149)
    at com.netflix.curator.framework.imps.ExistsBuilderImpl$2.call(ExistsBuilderImpl.java:138)
    at com.netflix.curator.RetryLoop.callWithRetry(RetryLoop.java:85)
    at com.netflix.curator.framework.imps.ExistsBuilderImpl.pathInForeground(ExistsBuilderImpl.java:134)
    at com.netflix.curator.framework.imps.ExistsBuilderImpl.forPath(ExistsBuilderImpl.java:125)
    at com.netflix.curator.framework.imps.ExistsBuilderImpl.forPath(ExistsBuilderImpl.java:34)
    at backtype.storm.zookeeper$exists_node_QMARK_.invoke(zookeeper.clj:78)
    at backtype.storm.zookeeper$exists.invoke(zookeeper.clj:117)
    at backtype.storm.cluster$mk_distributed_cluster_state$reify__1996.set_data(cluster.clj:70)
    at backtype.storm.cluster$mk_storm_cluster_state$reify__2415.worker_heartbeat_BANG_(cluster.clj:276)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
    at java.lang.reflect.Method.invoke(Method.java:597)
    at clojure.lang.Reflector.invokeMatchingMethod(Reflector.java:93)
    at clojure.lang.Reflector.invokeInstanceMethod(Reflector.java:28)
    at backtype.storm.daemon.worker$do_executor_heartbeats.doInvoke(worker.clj:35)
    at clojure.lang.RestFn.invoke(RestFn.java:439)
    at backtype.storm.daemon.worker$fn__4348$exec_fn__1228__auto____4349$fn__4352.invoke(worker.clj:346)
    at backtype.storm.timer$schedule_recurring$this__1776.invoke(timer.clj:69)
    at backtype.storm.timer$mk_timer$fn__1759$fn__1760.invoke(timer.clj:33)
    at backtype.storm.timer$mk_timer$fn__1759.invoke(timer.clj:26)
    at clojure.lang.AFn.run(AFn.java:24)
    at java.lang.Thread.run(Thread.java:680)

I have just encountered with this problem, too. My problem is the running time is set too short.The zookeeper do not have enough time to shut down properly.Look at the code below:

    builder.createTopology());

    try {
        Thread.sleep(20000);
    } catch (InterruptedException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }
    cluster.shutdown();
}

You should set enough time before the cluster.shutdown() was called. At first, I set Thread.sleep(1000), then the same problem occurred as yours. After I changed the time, this problem never showed up again.

来源：https://stackoverflow.com/questions/19151897/connection-refused-error-in-storm

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apache-storm