ServerDiscoverySelector - No server instance found for [druid/coordinator]

I am running into this same error from both broker.log and historical.log . I saw this question was asked many times in the group , but seems like my problem here is none of the previous one. I am running druid 0.14.0. Any advise on what should I check? Thanks.

Here is my $DRUID_HOME/conf/druid/_common/common.runtime.properties, I pretty much leave everything default for zk settings.

druid.zk.service.host=

druid.zk.paths.base=/druid

druid.selectors.indexing.serviceName=druid/overlord

druid.selectors.coordinator.serviceName=druid/coordinator

``

Here is my $DRUID_HOME/conf/druid/coordinator/runtime.properties

druid.service=druid/coordinator

druid.plaintextPort=8081

druid.coordinator.startDelay=PT10S

druid.coordinator.period=PT5S

``

Here is my $DRUID_HOME/conf/druid/coordinator/main.config

org.apache.druid.cli.Main server coordinator

``

ERROR on zk.log

2019-05-02 22:29:53,818 INFO [ProcessThread(sid:0 cport:2181):] org.apache.zookeeper.server.PrepRequestProcessor - Got user-level KeeperException when processing sessionid:0x10028c4ff440001 type:create cxid:0x1b zxid:0x28 txntype:-1 reqpath:n/a Error Path:/druid/coordinator/_COORDINATOR Error:KeeperErrorCode = NoNode for /druid/coordinator/_COORDINATOR

``

ERROR

2019-05-02T22:29:52,978 ERROR [main] org.apache.druid.curator.discovery.ServerDiscoverySelector - No server instance found for [druid/coordinator]2019-05-02T22:29:52,979 INFO [NodeTypeWatcher[COORDINATOR]] org.apache.druid.curator.discovery.CuratorDruidNodeDiscoveryProvider$NodeTypeWatcher - Received INITIALIZED in node watcher.

2019-05-02T22:29:52,989 INFO [NodeTypeWatcher[OVERLORD]] org.apache.druid.curator.discovery.CuratorDruidNodeDiscoveryProvider$NodeTypeWatcher - Received INITIALIZED in node watcher.

2019-05-02T22:29:52,980 WARN [main] org.apache.druid.java.util.common.RetryUtils - Retrying (1 of 2) in 929ms.

org.apache.druid.java.util.common.IOE: No known server

    at org.apache.druid.discovery.DruidLeaderClient.getCurrentKnownLeader(DruidLeaderClient.java:298) ~[druid-server-0.14.0-incubating.jar:0.14.0-incubating]

    at org.apache.druid.discovery.DruidLeaderClient.makeRequest(DruidLeaderClient.java:131) ~[druid-server-0.14.0-incubating.jar:0.14.0-incubating]

    at org.apache.druid.discovery.DruidLeaderClient.makeRequest(DruidLeaderClient.java:139) ~[druid-server-0.14.0-incubating.jar:0.14.0-incubating]

    at org.apache.druid.query.lookup.LookupReferencesManager.fetchLookupsForTier(LookupReferencesManager.java:565) ~[druid-server-0.14.0-incubating.jar:0.14.0-incubating]

    at org.apache.druid.query.lookup.LookupReferencesManager.tryGetLookupListFromCoordinator(LookupReferencesManager.java:417) ~[druid-server-0.14.0-incubating.jar:0.14.0-incubating]

    at org.apache.druid.query.lookup.LookupReferencesManager.lambda$getLookupListFromCoordinator$4(LookupReferencesManager.java:395) ~[druid-server-0.14.0-incubating.jar:0.14.0-incubating]

    at org.apache.druid.java.util.common.RetryUtils.retry(RetryUtils.java:86) [druid-core-0.14.0-incubating.jar:0.14.0-incubating]

    at org.apache.druid.java.util.common.RetryUtils.retry(RetryUtils.java:114) [druid-core-0.14.0-incubating.jar:0.14.0-incubating]

    at org.apache.druid.java.util.common.RetryUtils.retry(RetryUtils.java:104) [druid-core-0.14.0-incubating.jar:0.14.0-incubating]

    at org.apache.druid.query.lookup.LookupReferencesManager.getLookupListFromCoordinator(LookupReferencesManager.java:385) [druid-server-0.14.0-incubating.jar:0.14.0-incubating]

    at org.apache.druid.query.lookup.LookupReferencesManager.getLookupsList(LookupReferencesManager.java:362) [druid-server-0.14.0-incubating.jar:0.14.0-incubating]

    at org.apache.druid.query.lookup.LookupReferencesManager.loadAllLookupsAndInitStateRef(LookupReferencesManager.java:345) [druid-server-0.14.0-incubating.jar:0.14.0-incubating]

    at org.apache.druid.query.lookup.LookupReferencesManager.start(LookupReferencesManager.java:153) [druid-server-0.14.0-incubating.jar:0.14.0-incubating]

    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_201]

    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[?:1.8.0_201]

    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.8.0_201]

    at java.lang.reflect.Method.invoke(Method.java:498) ~[?:1.8.0_201]

    at org.apache.druid.java.util.common.lifecycle.Lifecycle$AnnotationBasedHandler.start(Lifecycle.java:427) [druid-core-0.14.0-incubating.jar:0.14.0-incubating]

    at org.apache.druid.java.util.common.lifecycle.Lifecycle.start(Lifecycle.java:323) [druid-core-0.14.0-incubating.jar:0.14.0-incubating]

    at org.apache.druid.guice.LifecycleModule$2.start(LifecycleModule.java:138) [druid-core-0.14.0-incubating.jar:0.14.0-incubating]

    at org.apache.druid.cli.GuiceRunnable.initLifecycle(GuiceRunnable.java:107) [druid-services-0.14.0-incubating.jar:0.14.0-incubating]

    at org.apache.druid.cli.ServerRunnable.run(ServerRunnable.java:58) [druid-services-0.14.0-incubating.jar:0.14.0-incubating]

    at org.apache.druid.cli.Main.main(Main.java:118) [druid-services-0.14.0-incubating.jar:0.14.0-incubating]

``