[CI] RemoteClusterConnectionTests.testDiscoverSingleNode

[vladimirdolzhenko]

Doesn't reproduce locally

https://elasticsearch-ci.elastic.co/job/elastic+elasticsearch+6.x+matrix-java-periodic/ES_BUILD_JAVA=java10,ES_RUNTIME_JAVA=java10,nodes=virtual&&linux/60/console

 2> REPRODUCE WITH: ./gradlew :server:test -Dtests.seed=EC9E0C70237EA138 -Dtests.class=org.elasticsearch.transport.RemoteClusterConnectionTests -Dtests.method="testDiscoverSingleNode" -Dtests.security.manager=true -Dtests.locale=ha -Dtests.timezone=America/Lower_Princes
ERROR   0.05s J0 | RemoteClusterConnectionTests.testDiscoverSingleNode <<< FAILURES!
   > Throwable #1: com.carrotsearch.randomizedtesting.UncaughtExceptionError: Captured an uncaught exception in thread: Thread[id=1868, name=elasticsearch[org.elasticsearch.transport.RemoteClusterConnectionTests][management][T#1], state=RUNNABLE, group=TGRP-RemoteClusterConnectionTests]
   > 	at __randomizedtesting.SeedInfo.seed([EC9E0C70237EA138:1A50AFD86729C6D3]:0)
   > Caused by: java.lang.AssertionError: ExecutionCancelledException[operation was cancelled reason [connect handler is closed]]
   > 	at __randomizedtesting.SeedInfo.seed([EC9E0C70237EA138]:0)
   > 	at org.elasticsearch.transport.RemoteClusterConnectionTests$9.onFailure(RemoteClusterConnectionTests.java:963)
   > 	at org.elasticsearch.action.LatchedActionListener.onFailure(LatchedActionListener.java:50)
   > 	at org.elasticsearch.action.ActionListener.onFailure(ActionListener.java:138)
   > 	at org.elasticsearch.transport.RemoteClusterConnection$ConnectHandler$1.lambda$doRun$1(RemoteClusterConnection.java:407)
   > 	at org.elasticsearch.action.ActionListener$1.onFailure(ActionListener.java:68)
   > 	at org.elasticsearch.transport.RemoteClusterConnection$ConnectHandler.collectRemoteNodes(RemoteClusterConnection.java:474)
   > 	at org.elasticsearch.transport.RemoteClusterConnection$ConnectHandler$1.doRun(RemoteClusterConnection.java:412)
   > 	at org.elasticsearch.common.util.concurrent.AbstractRunnable.run(AbstractRunnable.java:37)
   > 	at java.base/java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:514)
   > 	at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)
   > 	at org.elasticsearch.common.util.concurrent.ThreadContext$ContextPreservingRunnable.run(ThreadContext.java:625)
   > 	at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1135)
   > 	at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635)
   > 	at java.base/java.lang.Thread.run(Thread.java:844)
   > Caused by: ExecutionCancelledException[operation was cancelled reason [connect handler is closed]]
   > 	at org.elasticsearch.common.util.CancellableThreads.onCancel(CancellableThreads.java:63)
   > 	at org.elasticsearch.common.util.CancellableThreads.executeIO(CancellableThreads.java:129)
   > 	at org.elasticsearch.transport.RemoteClusterConnection$ConnectHandler.collectRemoteNodes(RemoteClusterConnection.java:425)
   > 	... 8 more

looks similar to issue #28695

@elastic/es-core-infra could please somebody have a look into it ?

[jasontedor]

@martijnvg Would you take a look?