https://answers.axonivy.com/questions/2831/can-not-connect-to-elasticsearch-server<p>hi all</p> <p>I'm using Axon ivy 6.3 on Linux server. Sometime i get this exception (after deployment somehow):</p> <pre><code> Caused by: ch.ivyteam.ivy.business.data.store.search.internal.elasticsearch.ElasticsearchException: Cannot reach Elasticsearch server at ch.ivyteam.ivy.business.data.store.search.internal.elasticsearch.JestOperation.execute(JestOperation.java:44) at ch.ivyteam.ivy.business.data.store.search.internal.elasticsearch.JestSearcher.search(JestSearcher.java:32) at ch.ivyteam.ivy.business.data.store.search.internal.ResultImpl.execute(ResultImpl.java:36) at ch.ivyteam.ivy.business.data.store.search.internal.QueryImpl.raw(QueryImpl.java:135) at ch.ivyteam.ivy.business.data.store.search.internal.QueryImpl.executeQuery(QueryImpl.java:179) at ch.ivyteam.ivy.business.data.store.search.internal.ExecutorImpl.execute(ExecutorImpl.java:18) at ch.ivyteam.ivy.business.data.store.search.internal.QueryImpl.execute(QueryImpl.java:115) at ch.axonivy.fintech.standard.dossier.DossierIdGenerator.initializeSeed(DossierIdGenerator.java:64) at ch.axonivy.fintech.standard.dossier.DossierIdGenerator.nextId(DossierIdGenerator.java:43) at ch.axonivy.fintech.abs.dossier.AbsDossierService.generateCobId(AbsDossierService.java:57) at sun.reflect.GeneratedMethodAccessor9141.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:498) at ch.ivyteam.ivy.scripting.internal.types.IvyJavaMethod.invokeImpl(IvyJavaMethod.java:73) ... 211 more Caused by: io.searchbox.client.config.exception.CouldNotConnectException: Could not connect to <a href="http://localhost:19200">http://localhost:19200</a> at io.searchbox.client.http.JestHttpClient.execute(JestHttpClient.java:59) at ch.ivyteam.ivy.business.data.store.search.internal.elasticsearch.JestOperation.execute(JestOperation.java:37) ... 224 more Caused by: org.apache.http.conn.HttpHostConnectException: Connect to localhost:19200 [localhost/127.0.0.1] failed: Connection refused at org.apache.http.impl.conn.DefaultHttpClientConnectionOperator.connect(DefaultHttpClientConnectionOperator.java:158) at org.apache.http.impl.conn.PoolingHttpClientConnectionManager.connect(PoolingHttpClientConnectionManager.java:353) at org.apache.http.impl.execchain.MainClientExec.establishRoute(MainClientExec.java:380) at org.apache.http.impl.execchain.MainClientExec.execute(MainClientExec.java:236) at org.apache.http.impl.execchain.ProtocolExec.execute(ProtocolExec.java:184) at org.apache.http.impl.execchain.RetryExec.execute(RetryExec.java:88) at org.apache.http.impl.execchain.RedirectExec.execute(RedirectExec.java:110) at org.apache.http.impl.client.InternalHttpClient.doExecute(InternalHttpClient.java:184) at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:82) at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:107) at io.searchbox.client.http.JestHttpClient.executeRequest(JestHttpClient.java:109) at io.searchbox.client.http.JestHttpClient.execute(JestHttpClient.java:56) ... 225 more Caused by: java.net.ConnectException: Connection refused at java.net.PlainSocketImpl.socketConnect(Native Method) at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350) at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206) at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188) at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392) at java.net.Socket.connect(Socket.java:589) at org.apache.http.conn.socket.PlainConnectionSocketFactory.connectSocket(PlainConnectionSocketFactory.java:74) at org.apache.http.impl.conn.DefaultHttpClientConnectionOperator.connect(DefaultHttpClientConnectionOperator.java:141) ... 236 more </code></pre> <p>After restarting server, it's seem to work again.</p> <p>The exception is clear but we don't know rootcause yet. Does anyone get same issue? and do you have any hints for it?</p> <p>Updated: i have deployed several ivy engine on same physical server, i think there is some instance of elasticservers as well. Could it be a confliction there?</p> <p>Thanks in advance</p>enTue, 29 Aug 2017 07:51:44 -0400https://answers.axonivy.com/questions/2831/can-not-connect-to-elasticsearch-server/2832<p>On a linux OS it can take more time until an already used TCP port is available again. I think you problem could occur if you shutdown and restart the engine immediately. I'm not sure if the implementation under 6.3 is trying alternative free ports like 19201 if the 19200 is already bound. But I know that we do it with the latest version at Design Time. </p>Reguel WermelingerTue, 29 Aug 2017 07:51:44 -0400https://answers.axonivy.com/questions/2831/can-not-connect-to-elasticsearch-server/2832