# Cross Cluster Search does not work after a restart

**URL:** <https://discuss.elastic.co/t/cross-cluster-search-does-not-work-after-a-restart/148276>\
**Category:** Elasticsearch\
**Created:** [September 12, 2018, 7:59am UTC](https://discuss.elastic.co/t/cross-cluster-search-does-not-work-after-a-restart/148276 "2018-09-12T07:59:57Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Gok](https://avatars.discourse-cdn.com/v4/letter/g/8491ac/32.png) [@Gok](https://discuss.elastic.co/u/Gok)\
**Post date:** [September 12, 2018, 7:59am UTC](https://discuss.elastic.co/t/cross-cluster-search-does-not-work-after-a-restart/148276/1 "2018-09-12T07:59:57Z")

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Configured the Cross Cluster Search in elasticsearch.yml with two remote clusters. Everything is fine for the first time it starts.

But when the CCS node is restarted, it does not connect to the remote cluster and throws the below exception,

[2018-09-12T07:43:52,505][WARN][o.e.t.RemoteClusterService] [node-2] failed to update seed list for cluster: one\_six\_four  
org.elasticsearch.transport.ConnectTransportException: [][[2620:108:70:9303:5054:ff:fe29:4e72]:9300] handshake\_timeout[30s]  
at org.elasticsearch.transport.TcpTransport.executeHandshake(TcpTransport.java:1676) ~[elasticsearch-6.4.0.jar:6.4.0]  
at org.elasticsearch.transport.TcpTransport.openConnection(TcpTransport.java:654) ~[elasticsearch-6.4.0.jar:6.4.0]  
at org.elasticsearch.transport.TcpTransport.openConnection(TcpTransport.java:124) ~[elasticsearch-6.4.0.jar:6.4.0]  
at org.elasticsearch.transport.TransportService.openConnection(TransportService.java:348) ~[elasticsearch-6.4.0.jar:6.4.0]  
at org.elasticsearch.transport.RemoteClusterConnection$ConnectHandler.lambda$collectRemoteNodes$2(RemoteClusterConnection.java:458) ~[elasticsearch-6.4.0.jar:6.4.0]  
at org.elasticsearch.common.util.CancellableThreads.executeIO(CancellableThreads.java:105) ~[elasticsearch-6.4.0.jar:6.4.0]  
at org.elasticsearch.transport.RemoteClusterConnection$ConnectHandler.collectRemoteNodes(RemoteClusterConnection.java:455) [elasticsearch-6.4.0.jar:6.4.0]  
at org.elasticsearch.transport.RemoteClusterConnection$ConnectHandler$1.doRun(RemoteClusterConnection.java:443) [elasticsearch-6.4.0.jar:6.4.0]  
at org.elasticsearch.common.util.concurrent.AbstractRunnable.run(AbstractRunnable.java:37) [elasticsearch-6.4.0.jar:6.4.0]  
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) [?:1.8.0\_91]  
at java.util.concurrent.FutureTask.run(FutureTask.java:266) [?:1.8.0\_91]  
at org.elasticsearch.common.util.concurrent.ThreadContext$ContextPreservingRunnable.run(ThreadContext.java:624) [elasticsearch-6.4.0.jar:6.4.0]  
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) [?:1.8.0\_91]  
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) [?:1.8.0\_91]  
at java.lang.Thread.run(Thread.java:745) [?:1.8.0\_91]  
[2018-09-12T07:43:52,520][WARN][o.e.b.ElasticsearchUncaughtExceptionHandler] [node-2] uncaught exception in thread [main]  
org.elasticsearch.bootstrap.StartupException: java.lang.IllegalStateException: failed to connect to remote clusters  
at org.elasticsearch.bootstrap.Elasticsearch.init(Elasticsearch.java:140) ~[elasticsearch-6.4.0.jar:6.4.0]  
at org.elasticsearch.bootstrap.Elasticsearch.execute(Elasticsearch.java:127) ~[elasticsearch-6.4.0.jar:6.4.0]  
at org.elasticsearch.cli.EnvironmentAwareCommand.execute(EnvironmentAwareCommand.java:86) ~[elasticsearch-6.4.0.jar:6.4.0]  
at org.elasticsearch.cli.Command.mainWithoutErrorHandling(Command.java:124) ~[elasticsearch-cli-6.4.0.jar:6.4.0]  
at org.elasticsearch.cli.Command.main(Command.java:90) ~[elasticsearch-cli-6.4.0.jar:6.4.0]  
at org.elasticsearch.bootstrap.Elasticsearch.main(Elasticsearch.java:93) ~[elasticsearch-6.4.0.jar:6.4.0]  
at org.elasticsearch.bootstrap.Elasticsearch.main(Elasticsearch.java:86) ~[elasticsearch-6.4.0.jar:6.4.0]  
Caused by: java.lang.IllegalStateException: failed to connect to remote clusters  
at org.elasticsearch.transport.RemoteClusterService.initializeRemoteClusters(RemoteClusterService.java:347) ~[elasticsearch-6.4.0.jar:6.4.0]  
at org.elasticsearch.transport.TransportService.doStart(TransportService.java:227) ~[elasticsearch-6.4.0.jar:6.4.0]  
at org.elasticsearch.common.component.AbstractLifecycleComponent.start(AbstractLifecycleComponent.java:66) ~[elasticsearch-6.4.0.jar:6.4.0]  
at org.elasticsearch.node.Node.start(Node.java:667) ~[elasticsearch-6.4.0.jar:6.4.0]  
at org.elasticsearch.bootstrap.Bootstrap.start(Bootstrap.java:265) ~[elasticsearch-6.4.0.jar:6.4.0]  
at org.elasticsearch.bootstrap.Bootstrap.init(Bootstrap.java:335) ~[elasticsearch-6.4.0.jar:6.4.0]  
at org.elasticsearch.bootstrap.Elasticsearch.init(Elasticsearch.java:136) ~[elasticsearch-6.4.0.jar:6.4.0]  
... 6 more  
Caused by: java.util.concurrent.ExecutionException: ConnectTransportException[[][[2620:108:70:9303:5054:ff:fe29:4e72]:9300] handshake\_timeout[30s]]  
at org.elasticsearch.common.util.concurrent.BaseFuture$Sync.getValue(BaseFuture.java:265) ~[elasticsearch-6.4.0.jar:6.4.0]  
at org.elasticsearch.common.util.concurrent.BaseFuture$Sync.get(BaseFuture.java:238) ~[elasticsearch-6.4.0.jar:6.4.0]  
at org.elasticsearch.common.util.concurrent.BaseFuture.get(BaseFuture.java:69) ~[elasticsearch-6.4.0.jar:6.4.0]  
at org.elasticsearch.transport.RemoteClusterService.initializeRemoteClusters(RemoteClusterService.java:341) ~[elasticsearch-6.4.0.jar:6.4.0]  
at org.elasticsearch.transport.TransportService.doStart(TransportService.java:227) ~[elasticsearch-6.4.0.jar:6.4.0]  
at org.elasticsearch.common.component.AbstractLifecycleComponent.start(AbstractLifecycleComponent.java:66) ~[elasticsearch-6.4.0.jar:6.4.0]  
at org.elasticsearch.node.Node.start(Node.java:667) ~[elasticsearch-6.4.0.jar:6.4.0]  
at org.elasticsearch.bootstrap.Bootstrap.start(Bootstrap.java:265) ~[elasticsearch-6.4.0.jar:6.4.0]  
at org.elasticsearch.bootstrap.Bootstrap.init(Bootstrap.java:335) ~[elasticsearch-6.4.0.jar:6.4.0]  
at org.elasticsearch.bootstrap.Elasticsearch.init(Elasticsearch.java:136) ~[elasticsearch-6.4.0.jar:6.4.0]  
... 6 more  
Caused by: org.elasticsearch.transport.ConnectTransportException: [][[2620:108:70:9303:5054:ff:fe29:4e72]:9300] handshake\_timeout[30s]  
at org.elasticsearch.transport.TcpTransport.executeHandshake(TcpTransport.java:1676) ~[elasticsearch-6.4.0.jar:6.4.0]  
at org.elasticsearch.transport.TcpTransport.openConnection(TcpTransport.java:654) ~[elasticsearch-6.4.0.jar:6.4.0]  
at org.elasticsearch.transport.TcpTransport.openConnection(TcpTransport.java:124) ~[elasticsearch-6.4.0.jar:6.4.0]  
at org.elasticsearch.transport.TransportService.openConnection(TransportService.java:348) ~[elasticsearch-6.4.0.jar:6.4.0]  
at org.elasticsearch.transport.RemoteClusterConnection$ConnectHandler.lambda$collectRemoteNodes$2(RemoteClusterConnection.java:458) ~[elasticsearch-6.4.0.jar:6.4.0]  
at org.elasticsearch.common.util.CancellableThreads.executeIO(CancellableThreads.java:105) ~[elasticsearch-6.4.0.jar:6.4.0]

Any idea?

Thanks in advance!

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<div class="post-metadata">

**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\
**Post date:** [October 10, 2018, 8:00am UTC](https://discuss.elastic.co/t/cross-cluster-search-does-not-work-after-a-restart/148276/2 "2018-10-10T08:00:08Z")

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