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Xiao Chen commented on HDFS-12726: ---------------------------------- To be specific, {{debugLoggingBuilder}} itself not {{toString}} should be fine, since the log is done by the local var builder: {code} builder = debugLoggingBuilder.get(); .... if (numOfReplicas>0) { String detail = enableDebugLogging; if (LOG.isDebugEnabled()) { if (badTarget && builder != null) { detail = builder.toString(); builder.setLength(0); } else { detail = ""; } } throw new NotEnoughReplicasException(detail); } {code} But when should the {{detail}} be logged should be investigated. At least for the unit test in HDFS-12725, nothing is there. This is inconvenient to debugging at least, since {{logNodeIsNotChosen}} is then a no-op. > BlockPlacementPolicyDefault's debugLoggingBuilder is not logged > --------------------------------------------------------------- > > Key: HDFS-12726 > URL: https://issues.apache.org/jira/browse/HDFS-12726 > Project: Hadoop HDFS > Issue Type: Bug > Components: logging > Reporter: Xiao Chen > Labels: supportability > > During debugging HDFS-12725, {{BlockPlacementPolicyDefault's}} class' > {{debugLoggingBuilder}} does a lot of {{get}} and {{append}}, but never > {{toString}} and {{LOG.debug}}'ed. -- This message was sent by Atlassian JIRA (v6.4.14#64029) --------------------------------------------------------------------- To unsubscribe, e-mail: hdfs-issues-unsubscr...@hadoop.apache.org For additional commands, e-mail: hdfs-issues-h...@hadoop.apache.org