[jira] [Created] (FLINK-4820) Slf4j / log4j version upgrade to support dynamic change of log levels.

[Zhenzhong Xu (JIRA)]

Zhenzhong Xu created FLINK-4820:
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             Summary: Slf4j / log4j version upgrade to support dynamic change 
of log levels.
                 Key: FLINK-4820
                 URL: https://issues.apache.org/jira/browse/FLINK-4820
             Project: Flink
          Issue Type: Task
            Reporter: Zhenzhong Xu






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