在flink-1.13.2中测试执行批处理版本的单词计数程序时，出现"Exception in thread "Thread-5" java.lang.IllegalStateException: T
2022-04-11 08:48:23.0
问题描述
在flink-1.13.2中测试执行批处理版本的单词计数程序时：
$ cd ~/bigdata/flink-1.13.2 $ ./bin/flink run -t yarn-per-job -p 2 -yjm 1G -ytm 1G ./examples/batch/WordCount.jar
程序正常执行，单词计数结果也正常输出，但是最后出现下面这样的异常信息：
Exception in thread "Thread-5" 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$SafetyNetWrapperClassLoader.ensureInner(FlinkUserCodeClassLoaders.java:164)
at org.apache.flink.runtime.execution.librarycache.FlinkUserCodeClassLoaders$SafetyNetWrapperClassLoader.getResource(FlinkUserCodeClassLoaders.java:183)
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)
解决办法
在Flink的conf/flink-conf.yaml文件中，添加下面这行内容即可：
classloader.check-leaked-classloader: false
