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Review request for hive. Repository: hive-git Description ------- Previously HIVE-16061 and HIVE-16400 changed Operation Logging to use the Log4j2 RoutingAppender to automatically output the log for each query into an individual operation log file. As log4j does not know when a query is finished it keeps the OutputStream in the Appender open even when the query completes. The stream holds a file descriptor and so we leak file descriptors. Note that we are already careful to close any streams reading from the operation log file. To fix this we use a technique described in the comments of LOG4J2-510 which uses reflection to close the appender. The test in TestOperationLoggingLayout is extended to check that the Appender is closed. Diffs ----- itests/hive-unit/src/test/java/org/apache/hive/service/cli/operation/TestOperationLoggingLayout.java 1a8337f574bb753e8c3c48a6b477b17700b05256 ql/src/java/org/apache/hadoop/hive/ql/log/LogDivertAppender.java e697b545984555414e27bafe92d7f22829a22687 service/src/java/org/apache/hive/service/cli/operation/Operation.java 8d453d5d9153c2ec86c4adc7a68bd3b5dd249743 Diff: https://reviews.apache.org/r/61010/diff/1/ Testing ------- Hand testing to show leak has gone. The test in TestOperationLoggingLayout is extended to check that the Appender is closed. Thanks, Andrew Sherman
