Elastic search 6.4.0 test case execution failed - Could not dispatch a message to the daemon

Elasticsearch version ( bin/elasticsearch --version ): v6.4.0

JVM version ( java -version ): openjdk version "10.0.2-adoptopenjdk"

OS version ( uname -a if on a Unix-like system): Linux ubuntu 4.4.0-21-generic #37-Ubuntu SMP Mon Apr 18 18:33:37 UTC 2016 x86_64 x86_64 x86_64 GNU/Linux

Description of the problem including expected versus actual behavior :
Elastic search build is succesful but test case execution failed with an exception.

Actual:
all test cases should pass
Observed: (on both Intel and non-Intel architecture)
Found the 1testtasks: :client:benchmark:test -> class org.gradle.api.tasks.testing.Test_Decorated BUILD FAILED
14:00:46.338 [DEBUG] [org.gradle.launcher.daemon.client.DaemonClientInputForwarder] Dispatching close input message: org.gradle.launcher.daemon.protocol.CloseInput@5996d8e4 14:00:46.338 [DEBUG] [org.gradle.launcher.daemon.client.DaemonClientConnection] thread 18: dispatching class org.gradle.launcher.daemon.protocol.CloseInput 14:00:46.339 [DEBUG] [org.gradle.launcher.daemon.client.DaemonClient] Received result Failure[value=org.gradle.initialization.ReportedException: org.gradle.internal.exceptions.LocationAwareException: Found the 1testtasks: :client:benchmark:test -> class org.gradle.api.tasks.testing.Test_Decorated] from daemon DaemonInfo{pid=14844, address=[00d5ce49-cbfb-46f4-ac5c-2706300e9b49 port:40934, addresses:[/0:0:0:0:0:0:0:1, /127.0.0.1]], state=Busy, lastBusy=1535896561769, context=DefaultDaemonContext[uid=94452509-2ac2-4fc5-b600-8e097e73fc94,javaHome=/home/ubuntu/ES640_oracle/jdk-10.0.2,daemonRegistryDir=/home/ubuntu/.gradle/daemon,pid=14844,idleTimeout=120000,daemonOpts=-Xmx2g,-Dfile.encoding=UTF8,-Duser.country=US,-Duser.language=en,-Duser.variant]} (build should be done). 14:00:46.339 [DEBUG] [org.gradle.launcher.daemon.client.DaemonClientConnection] thread 1: dispatching class org.gradle.launcher.daemon.protocol.Finished 14:00:46.339 [DEBUG] [org.gradle.launcher.daemon.client.DaemonClientConnection] Problem dispatching message to the daemon. Performing 'on failure' operation... 14:00:46.346 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter] 14:00:46.347 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter] FAILURE: Build failed with an exception. 14:00:46.347 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter] 14:00:46.347 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter] * What went wrong: 14:00:46.347 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter] Could not dispatch a message to the daemon.

Steps to reproduce :

  1. Install and export JAVA (adopt open jdk 10 hotspot) from https://adoptopenjdk.net/nightly.html?variant=openjdk10&jvmVariant=hotspot
  2. cd /home/test
  3. git clone https://github.com/elastic/elasticsearch
  4. cd elasticsearch
  5. git checkout v6.4.0
  6. ./gradlew assemble
  7. ./gradlew test --continue -Dtests.haltonfailure=false -Dtests.es.node.mode=network

Elastic search 6.3.x is getting built and TC are passing with the same steps mentioned above, but getting the issue with v6.4.0 on the same VM with same settings.
(gradlew check is working which executes all the unit+integration TCs but this gradlew test issue persists)

Please let me know if I miss anything and provide steps if test suit is getting executed from your side.

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