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https://issues.apache.org/jira/browse/DRILL-5303?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15890875#comment-15890875
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Laurent Goujon commented on DRILL-5303:
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Java does not provide such guarantee as compiling against version N+1 jdk (with
source and target class using version N) and being able to run on version N:
you need the three of them (bootclasspath, source and target) to match
versions. And this kind of issues happened with all Java releases.
Coming with Java9 I believe, symbols for previous jdks will also be available
meaning you would not need java8 (just for the boot classpath) in order to
target jdk8.
> Drillbits fail to start when Drill server built with JDK 8 is deployed on a
> JDK 7 environment
> ---------------------------------------------------------------------------------------------
>
> Key: DRILL-5303
> URL: https://issues.apache.org/jira/browse/DRILL-5303
> Project: Apache Drill
> Issue Type: Bug
> Components: Server, Tools, Build & Test
> Affects Versions: 1.9.0
> Reporter: Abhishek Girish
>
> When Drill is built on a node configured with JDK 8 and is then deployed in a
> JDK 7 environment, Drillbits fail to start and the following errors are seen
> in Drillbit.out:
> {code}
> Exception in thread "main" java.lang.NoSuchMethodError:
> java.util.concurrent.ConcurrentHashMap.keySet()Ljava/util/concurrent/ConcurrentHashMap$KeySetView;
> at
> org.apache.drill.exec.coord.ClusterCoordinator.drillbitRegistered(ClusterCoordinator.java:85)
> at
> org.apache.drill.exec.coord.zk.ZKClusterCoordinator.updateEndpoints(ZKClusterCoordinator.java:266)
> at
> org.apache.drill.exec.coord.zk.ZKClusterCoordinator.start(ZKClusterCoordinator.java:135)
> at org.apache.drill.exec.server.Drillbit.run(Drillbit.java:117)
> at org.apache.drill.exec.server.Drillbit.start(Drillbit.java:292)
> at org.apache.drill.exec.server.Drillbit.start(Drillbit.java:272)
> at org.apache.drill.exec.server.Drillbit.main(Drillbit.java:268)
> {code}
> Workaround is to match the Java versions of build and deployment environments.
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