报错：SemanticException org.apache.hadoop.hive.ql.metadata.HiveException: java.lang.RuntimeException：Un

报错内容： hive> show databases; FAILED: SemanticException org.apache.hadoop.hive.ql.metadata.HiveException: java.lang.RuntimeException: Unable to instantiate org.apache.hadoop.hive.ql.metadata.SessionHive

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