# Loosing node connection after update to 7.9.2 **URL:** \ **Category:** Elasticsearch\ **Created:** [October 8, 2020, 9:28am UTC](https://discuss.elastic.co/t/loosing-node-connection-after-update-to-7-9-2/251405 "2020-10-08T09:28:18Z")\ **Posts on this page:** 2\ **Page:** 1
**Author:** ![whysmer](https://avatars.discourse-cdn.com/v4/letter/w/e36b37/32.png) [@whysmer](https://discuss.elastic.co/u/whysmer)\ **Post date:** [October 8, 2020, 9:28am UTC](https://discuss.elastic.co/t/loosing-node-connection-after-update-to-7-9-2/251405/1 "2020-10-08T09:28:18Z")
Hello, I have one node which is not reconecting after updating from 7.7.1 to 7.9.2 my cluster of three nodes. Here is the error, I don't understand why it's a connection problem as nothing changed ? > [2020-10-08T11:22:21,962][INFO][o.e.c.c.JoinHelper] [XXXXXXELK03PLV] failed to join {XXXXXXELK01PLV}{IyEy66H5R6CeaB7\_IAAeTQ}{0zTBfK5vRyej5P9eDWVWrA}{10.11.10.164}{10.11.10.164:9300}{dilmrt}{ml.machine\_memory=25047142400, ml.max\_open\_jobs=20, xpack.installed=true, transform.node=true} with JoinRequest{sourceNode={XXXXXXELK03PLV}{rcBEbffpTu-D7TpCUk-olQ}{wJFr8zzrQCS7zEvipAjAGA}{10.11.10.166}{10.11.10.166:9300}{dilmrt}{ml.machine\_memory=25055739904, xpack.installed=true, transform.node=true, ml.max\_open\_jobs=20}, minimumTerm=18, optionalJoin=Optional.empty} > org.elasticsearch.transport.RemoteTransportException: [XXXXXXELK01PLV][10.11.10.164:9300][internal:cluster/coordination/join] > Caused by: org.elasticsearch.transport.ConnectTransportException: [XXXXXXELK03PLV][10.11.10.166:9300] connect\_exception > at org.elasticsearch.transport.TcpTransport$ChannelsConnectedListener.onFailure(TcpTransport.java:966) ~[elasticsearch-7.9.2.jar:7.9.2] > at org.elasticsearch.action.ActionListener.lambda$toBiConsumer$2(ActionListener.java:198) ~[elasticsearch-7.9.2.jar:7.9.2] > at org.elasticsearch.common.concurrent.CompletableContext.lambda$addListener$0(CompletableContext.java:42) ~[elasticsearch-core-7.9.2.jar:7.9.2] > at java.util.concurrent.CompletableFuture.uniWhenComplete(CompletableFuture.java:859) ~[?:?] > at java.util.concurrent.CompletableFuture$UniWhenComplete.tryFire(CompletableFuture.java:837) ~[?:?] > at java.util.concurrent.CompletableFuture.postComplete(CompletableFuture.java:506) ~[?:?] > at java.util.concurrent.CompletableFuture.completeExceptionally(CompletableFuture.java:2152) ~[?:?] > at org.elasticsearch.common.concurrent.CompletableContext.completeExceptionally(CompletableContext.java:57) ~[elasticsearch-core-7.9.2.jar:7.9.2] > at org.elasticsearch.transport.netty4.Netty4TcpChannel.lambda$addListener$0(Netty4TcpChannel.java:68) ~[transport-netty4-client-7.9.2.jar:7.9.2] > at io.netty.util.concurrent.DefaultPromise.notifyListener0(DefaultPromise.java:577) ~[netty-common-4.1.49.Final.jar:4.1.49.Final] > at io.netty.util.concurrent.DefaultPromise.notifyListeners0(DefaultPromise.java:570) ~[netty-common-4.1.49.Final.jar:4.1.49.Final] > at io.netty.util.concurrent.DefaultPromise.notifyListenersNow(DefaultPromise.java:549) ~[netty-common-4.1.49.Final.jar:4.1.49.Final] > at io.netty.util.concurrent.DefaultPromise.notifyListeners(DefaultPromise.java:490) ~[netty-common-4.1.49.Final.jar:4.1.49.Final] > at io.netty.util.concurrent.DefaultPromise.setValue0(DefaultPromise.java:615) ~[netty-common-4.1.49.Final.jar:4.1.49.Final] > at io.netty.util.concurrent.DefaultPromise.setFailure0(DefaultPromise.java:608) ~[netty-common-4.1.49.Final.jar:4.1.49.Final] > at io.netty.util.concurrent.DefaultPromise.tryFailure(DefaultPromise.java:117) ~[netty-common-4.1.49.Final.jar:4.1.49.Final] > at io.netty.channel.nio.AbstractNioChannel$AbstractNioUnsafe.fulfillConnectPromise(AbstractNioChannel.java:321) ~[netty-transport-4.1.49.Final.jar:4.1.49.Final] > at io.netty.channel.nio.AbstractNioChannel$AbstractNioUnsafe.finishConnect(AbstractNioChannel.java:337) ~[netty-transport-4.1.49.Final.jar:4.1.49.Final] > at io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:702) [netty-transport-4.1.49.Final.jar:4.1.49.Final] > at io.netty.channel.nio.NioEventLoop.processSelectedKeysPlain(NioEventLoop.java:615) [netty-transport-4.1.49.Final.jar:4.1.49.Final] > at io.netty.channel.nio.NioEventLoop.processSelectedKeys(NioEventLoop.java:578) [netty-transport-4.1.49.Final.jar:4.1.49.Final] > at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:493) [netty-transport-4.1.49.Final.jar:4.1.49.Final] > at io.netty.util.concurrent.SingleThreadEventExecutor$4.run(SingleThreadEventExecutor.java:989) [netty-common-4.1.49.Final.jar:4.1.49.Final] > at io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74) [netty-common-4.1.49.Final.jar:4.1.49.Final] > at java.lang.Thread.run(Thread.java:832) [?:?] > Caused by: java.io.IOException: Aucun chemin d'accès pour atteindre l'hôte cible: 10.11.10.166/10.11.10.166:9300 > Caused by: java.io.IOException: Aucun chemin d'accès pour atteindre l'hôte cible > at sun.nio.ch.Net.pollConnect(Native Method) ~[?:?] > at sun.nio.ch.Net.pollConnectNow(Net.java:660) ~[?:?] > at sun.nio.ch.SocketChannelImpl.finishConnect(SocketChannelImpl.java:875) ~[?:?] > at io.netty.channel.socket.nio.NioSocketChannel.doFinishConnect(NioSocketChannel.java:330) ~[netty-transport-4.1.49.Final.jar:4.1.49.Final] > at io.netty.channel.nio.AbstractNioChannel$AbstractNioUnsafe.finishConnect(AbstractNioChannel.java:334) ~[netty-transport-4.1.49.Final.jar:4.1.49.Final] > at io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:702) ~[?:?] > at io.netty.channel.nio.NioEventLoop.processSelectedKeysPlain(NioEventLoop.java:615) ~[?:?] > at io.netty.channel.nio.NioEventLoop.processSelectedKeys(NioEventLoop.java:578) ~[?:?] > at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:493) ~[?:?] > at io.netty.util.concurrent.SingleThreadEventExecutor$4.run(SingleThreadEventExecutor.java:989) ~[?:?] > at io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74) ~[?:?] > at java.lang.Thread.run(Thread.java:832) ~[?:?] ---
**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\ **Post date:** [November 5, 2020, 9:28am UTC](https://discuss.elastic.co/t/loosing-node-connection-after-update-to-7-9-2/251405/2 "2020-11-05T09:28:21Z")
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