liuxunorg commented on issue #3374: [ZEPPELIN-3946] Fixed zeppelin hive interpreter broken pipe issue URL: https://github.com/apache/zeppelin/pull/3374#issuecomment-497989224 When connecting to a database through a database connection pool, If there is no sql operation for a long time, The database connection pool will actively close this connection. The connection between the client and the database is broken. So by increasing ``` poolableConnectionFactory.setValidationQuery("show databases"); ``` Periodically call the `show databases` statement, Keep the connection to the database.
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