[ https://issues.apache.org/jira/browse/FLINK-19916?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Robert Metzger updated FLINK-19916: ----------------------------------- Priority: Major (was: Minor) > Hadoop3 ShutdownHookManager visit closed ClassLoader > ---------------------------------------------------- > > Key: FLINK-19916 > URL: https://issues.apache.org/jira/browse/FLINK-19916 > Project: Flink > Issue Type: Bug > Components: Connectors / Hadoop Compatibility > Reporter: Jingsong Lee > Priority: Major > Labels: auto-deprioritized-major > > {code:java} > Exception in thread "Thread-10" java.lang.IllegalStateException: Trying to > access closed classloader. Please check if you store classloaders directly or > indirectly in static fields. If the stacktrace suggests that the leak occurs > in a third party library and cannot be fixed immediately, you can disable > this check with the configuration 'classloader.check-leaked-classloader'. > at > org.apache.flink.runtime.execution.librarycache.FlinkUserCodeClassLoaders$SafetyNetWrapperClassLoader.ensureInner(FlinkUserCodeClassLoaders.java:161) > at > org.apache.flink.runtime.execution.librarycache.FlinkUserCodeClassLoaders$SafetyNetWrapperClassLoader.getResource(FlinkUserCodeClassLoaders.java:179) > at > org.apache.hadoop.conf.Configuration.getResource(Configuration.java:2780) > at > org.apache.hadoop.conf.Configuration.getStreamReader(Configuration.java:3036) > at > org.apache.hadoop.conf.Configuration.loadResource(Configuration.java:2995) > at > org.apache.hadoop.conf.Configuration.loadResources(Configuration.java:2968) > at > org.apache.hadoop.conf.Configuration.getProps(Configuration.java:2848) > at org.apache.hadoop.conf.Configuration.get(Configuration.java:1200) > at > org.apache.hadoop.conf.Configuration.getTimeDuration(Configuration.java:1812) > at > org.apache.hadoop.conf.Configuration.getTimeDuration(Configuration.java:1789) > at > org.apache.hadoop.util.ShutdownHookManager.getShutdownTimeout(ShutdownHookManager.java:183) > at > org.apache.hadoop.util.ShutdownHookManager.shutdownExecutor(ShutdownHookManager.java:145) > at > org.apache.hadoop.util.ShutdownHookManager.access$300(ShutdownHookManager.java:65) > at > org.apache.hadoop.util.ShutdownHookManager$1.run(ShutdownHookManager.java:102) > {code} > This is because Hadoop 3 starts asynchronous threads to execute some shutdown > hooks. > These hooks are run after the job is executed, as a result, the classloader > has been released, but in hooks, configuration still holds the released > classloader, so it will fail to throw an exception in this asynchronous > thread. > Now it doesn't affect our function, it just prints the exception stack on the > console. -- This message was sent by Atlassian Jira (v8.3.4#803005)