Exception in thread "main" org.apache.zookeeper.KeeperException$ConnectionLossException: KeeperErrorCode = ConnectionLoss for -

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i trying simple zookeeper example leader election, , error , server doesn't start up. code: 

public leaderelection() throws ioexception, interruptedexception, keeperexception {     setzk(new zookeeper("localhost", timeout, this));      /* call gives problem */     stat s = getzk().exists(master, this);      if (s == null) {         getzk().create(master, "this node used election.".getbytes(),                 zoodefs.ids.open_acl_unsafe, createmode.persistent);     }     //wait till syncconnected signal received in process method.     latch.await();      setnodepath(getzk().create(master + node, null /*no data yet*/,             zoodefs.ids.open_acl_unsafe, createmode.ephemeral_sequential)); }

at exists() call error:

exception in thread "main" org.apache.zookeeper.keeperexception$connectionlossexception: keepererrorcode = connectionloss

please let me know missing. using version 3.4.5 of zk, , time out of 15k.


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