goiri commented on code in PR #5181: URL: https://github.com/apache/hadoop/pull/5181#discussion_r1038436246
########## hadoop-hdfs-project/hadoop-hdfs-rbf/src/main/java/org/apache/hadoop/hdfs/server/federation/fairness/AbstractRouterRpcFairnessPolicyController.java: ########## @@ -63,10 +63,14 @@ public void init(Configuration conf) { @Override public boolean acquirePermit(String nsId) { try { - LOG.debug("Taking lock for nameservice {}", nsId); + if (LOG.isDebugEnabled()) { + LOG.debug("Taking lock for nameservice {}", nsId); Review Comment: We have gone through this in the past. LOG.debug with {} should already be equivalent to adding the safeguard. Do you have some instrumentation showing that `LOG.isDebugEnabled()` is cheaper than just calling `LOG.debug()`? -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: common-issues-unsubscr...@hadoop.apache.org For queries about this service, please contact Infrastructure at: us...@infra.apache.org --------------------------------------------------------------------- To unsubscribe, e-mail: common-issues-unsubscr...@hadoop.apache.org For additional commands, e-mail: common-issues-h...@hadoop.apache.org