BELUGA BEHR created HIVE-20168: ---------------------------------- Summary: ReduceSinkOperator Logging Hidden Key: HIVE-20168 URL: https://issues.apache.org/jira/browse/HIVE-20168 Project: Hive Issue Type: Bug Components: Operators Affects Versions: 3.0.0, 4.0.0 Reporter: BELUGA BEHR
[https://github.com/apache/hive/blob/ac6b2a3fb195916e22b2e5f465add2ffbcdc7430/ql/src/java/org/apache/hadoop/hive/ql/exec/ReduceSinkOperator.java] {code:java} if (LOG.isTraceEnabled()) { if (numRows == cntr) { cntr = logEveryNRows == 0 ? cntr * 10 : numRows + logEveryNRows; if (cntr < 0 || numRows < 0) { cntr = 0; numRows = 1; } LOG.info(toString() + ": records written - " + numRows); } } ... if (LOG.isTraceEnabled()) { LOG.info(toString() + ": records written - " + numRows); } {code} There are logging guards here checking for TRACE level debugging but the logging is actually INFO. This is important logging for detecting data skew. Please change guards to check for INFO... or I would prefer that the guards are removed altogether since it's very rare that a service is running with only WARN level logging. -- This message was sent by Atlassian JIRA (v7.6.3#76005)