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https://issues.apache.org/jira/browse/FLINK-18246?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17132950#comment-17132950
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Robert Metzger commented on FLINK-18246:
----------------------------------------
This could also be a problem of the Azure setup, not sure.
> PyFlink e2e fails with java version mismatch on JDK11 nightly build
> -------------------------------------------------------------------
>
> Key: FLINK-18246
> URL: https://issues.apache.org/jira/browse/FLINK-18246
> Project: Flink
> Issue Type: Bug
> Components: API / Python, Build System, Tests
> Affects Versions: 1.12.0
> Reporter: Robert Metzger
> Priority: Major
> Labels: test-stability
>
> https://dev.azure.com/apache-flink/apache-flink/_build/results?buildId=3213&view=logs&j=6caf31d6-847a-526e-9624-468e053467d6&t=679407b1-ea2c-5965-2c8d-1467777fff88
> {code}
> Preparing transaction: ...working... done
> Verifying transaction: ...working... done
> Executing transaction: ...working... done
> Error: A JNI error has occurred, please check your installation and try again
> Exception in thread "main" java.lang.UnsupportedClassVersionError:
> org/apache/flink/client/cli/CliFrontend has been compiled by a more recent
> version of the Java Runtime (class file version 55.0), this version of the
> Java Runtime only recognizes class file versions up to 52.0
> at java.lang.ClassLoader.defineClass1(Native Method)
> at java.lang.ClassLoader.defineClass(ClassLoader.java:763)
> at
> java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
> at java.net.URLClassLoader.defineClass(URLClassLoader.java:467)
> at java.net.URLClassLoader.access$100(URLClassLoader.java:73)
> at java.net.URLClassLoader$1.run(URLClassLoader.java:368)
> at java.net.URLClassLoader$1.run(URLClassLoader.java:362)
> at java.security.AccessController.doPrivileged(Native Method)
> at java.net.URLClassLoader.findClass(URLClassLoader.java:361)
> at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
> at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:335)
> at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
> at sun.launcher.LauncherHelper.checkAndLoadMain(LauncherHelper.java:495)
> No taskexecutor daemon (pid: 123813) is running anymore on fv-az670.
> No standalonesession daemon to stop on host fv-az670.
> {code}
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