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Yun Tang commented on FLINK-20581: ---------------------------------- [~Lonie] Have you ever checked whether class {{org.apache.flink.util.JavaGcCleanerWrapper}} existed in your classpath and what's the exception stack trace in detail? >From my experiences, this should not be a bug in Flink. > java.lang.NoClassDefFoundError: Could not initialize class > org.apache.flink.util.JavaGcCleanerWrapper > ------------------------------------------------------------------------------------------------------ > > Key: FLINK-20581 > URL: https://issues.apache.org/jira/browse/FLINK-20581 > Project: Flink > Issue Type: Bug > Reporter: huzeming > Priority: Blocker > > flink 1.10.2 -- This message was sent by Atlassian Jira (v8.3.4#803005)