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core/src/main/scala/kafka/server/DelayedOperation.scala <https://reviews.apache.org/r/35201/#comment139836> Not sure if we need this check. Since all writes to watchersForKey are sync-ed, it's ok to remove a watcher as long as its count is 0. I am bit concerned about the overhead on the removeWatchersLock, which is global. For example, if you have 1000 requests/sec and each request has 1000 partitions, that lock is going to be access 1million times in a sec. Could you do some tests/profiling before and after we introduced the global lock to see if this could be an issue? - Jun Rao On June 8, 2015, 6:47 p.m., Guozhang Wang wrote: > > ----------------------------------------------------------- > This is an automatically generated e-mail. To reply, visit: > https://reviews.apache.org/r/35201/ > ----------------------------------------------------------- > > (Updated June 8, 2015, 6:47 p.m.) > > > Review request for kafka. > > > Bugs: KAFKA-2253 > https://issues.apache.org/jira/browse/KAFKA-2253 > > > Repository: kafka > > > Description > ------- > > Incorporated Jiangjie and Onur's comments > > > Diffs > ----- > > core/src/main/scala/kafka/server/DelayedOperation.scala > 123078d97a7bfe2121655c00f3b2c6af21c53015 > > Diff: https://reviews.apache.org/r/35201/diff/ > > > Testing > ------- > > > Thanks, > > Guozhang Wang > >
