jasonk000 commented on PR #12102: URL: https://github.com/apache/druid/pull/12102#issuecomment-1309414908
Adding some more background to this -- on clusters where we do not run this patch, we regularly see CPUs pinned in this code. This node has five cores dedicated to spinning in this loop, which plays havoc with our scaling policy and metrics.  Here is a flamegraph with `HttpPostEmitter` highlighted  -- A more serious edition, which I had to scroll down to capture, 25 CPUs pegged in this loop:   I've highlighted `HttpPostEmitter` here, totalling 98.4% of all samples:  -- 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: [email protected] For queries about this service, please contact Infrastructure at: [email protected] --------------------------------------------------------------------- To unsubscribe, e-mail: [email protected] For additional commands, e-mail: [email protected]
