Hi Deepak, thanks for reaching out!

Prod has 8 servers with 8x Xeon CPU @ 2.00GHz and 64GB RAM
Dev has 2 servers with 2x Xeon CPU @ 2.00GHz and 16GB RAM

Is there a way to monitor the MultiplexConnectionPool?

And is it CPU or RAM that is maxed out, you think?

I really appreciate any input :)

Cheers,
Henrik

On Mon, May 16, 2022 at 10:41 AM Deepak Goel <deic...@gmail.com> wrote:

> Looks like *MultiplexConnectionPool *is getting maxed out.
>
> Could you please tell us the server configuration of dev and prod? Looks
> like the dev environment is getting maxed out.
>
> Deepak
> "The greatness of a nation can be judged by the way its animals are treated
> - Mahatma Gandhi"
>
> +91 73500 12833
> deic...@gmail.com
>
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>
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>
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>
>
> On Mon, May 16, 2022 at 12:53 PM Henrik Brautaset Aronsen <
> henrik.aron...@gmail.com> wrote:
>
> > Hi.
> >
> > We keep getting "SolrServerException: Max requests queued per destination
> > 3000 exceeded for HttpDestination" for several different collections and
> > instances in our SolrCloud dev environment. The instances don't reply to
> > requests and need to be restarted to function again.
> >
> > We're not getting those errors in the prod environment even though those
> > are set up similarly.
> >
> > Any ideas what could cause this?
> >
> > We're on Solr 8.11.1 with connTimeout=60000, socketTimeout=60000,
> > zkClientTimeout=30000, solr.jetty.http.idleTimeout=60000. Full stacktrace
> > below.  Thanks for any help!
> >
> > Cheers,
> > Henrik
> >
> > java.util.concurrent.RejectedExecutionException: Max requests queued per
> > destination 3000 exceeded for
> > HttpDestination[http://dev-foo3672.bar.no:12621
> > ]@74097d87,queue=3000,pool=MultiplexConnectionPool@310bfd62
> > [c=0/4/4,a=0,i=0,q=3000]
> >  at
> org.eclipse.jetty.client.HttpDestination.send(HttpDestination.java:289)
> > ~[jetty-client-9.4.44.v20210927.jar:9.4.44.v20210927]
> >  at
> org.eclipse.jetty.client.HttpDestination.send(HttpDestination.java:262)
> > ~[jetty-client-9.4.44.v20210927.jar:9.4.44.v20210927]
> >  at org.eclipse.jetty.client.HttpClient.send(HttpClient.java:600)
> > ~[jetty-client-9.4.44.v20210927.jar:9.4.44.v20210927]
> >  at org.eclipse.jetty.client.HttpRequest.sendAsync(HttpRequest.java:778)
> > ~[jetty-client-9.4.44.v20210927.jar:9.4.44.v20210927]
> >  at org.eclipse.jetty.client.HttpRequest.send(HttpRequest.java:765)
> > ~[jetty-client-9.4.44.v20210927.jar:9.4.44.v20210927]
> >  at
> >
> >
> org.apache.solr.client.solrj.impl.Http2SolrClient.request(Http2SolrClient.java:409)
> > ~[solr-solrj-8.11.1.jar:8.11.1 0b002b11819df70783e83ef36b42ed1223c14b50 -
> > janhoy - 2021-12-14 13:50:57]
> >  at org.apache.solr.client.solrj.SolrServerException: Max requests queued
> > per destination 3000 exceeded for
> > HttpDestination[http://dev-foo3672.bar.no:12621
> > ]@74097d87,queue=3000,pool=MultiplexConnectionPool@310bfd62
> > [c=0/4/4,a=0,i=0,q=3000]
> >  at
> >
> >
> org.apache.solr.client.solrj.impl.Http2SolrClient.request(Http2SolrClient.java:439)
> > ~[solr-solrj-8.11.1.jar:8.11.1 0b002b11819df70783e83ef36b42ed1223c14b50 -
> > janhoy - 2021-12-14 13:50:57]
> >  at
> >
> >
> org.apache.solr.client.solrj.impl.Http2SolrClient.request(Http2SolrClient.java:776)
> > ~[solr-solrj-8.11.1.jar:8.11.1 0b002b11819df70783e83ef36b42ed1223c14b50 -
> > janhoy - 2021-12-14 13:50:57]
> >  at
> >
> >
> org.apache.solr.client.solrj.impl.ConcurrentUpdateHttp2SolrClient.request(ConcurrentUpdateHttp2SolrClient.java:370)
> > ~[solr-solrj-8.11.1.jar:8.11.1 0b002b11819df70783e83ef36b42ed1223c14b50 -
> > janhoy - 2021-12-14 13:50:57]
> >  at org.apache.solr.client.solrj.SolrClient.request(SolrClient.java:1290)
> > ~[solr-solrj-8.11.1.jar:8.11.1 0b002b11819df70783e83ef36b42ed1223c14b50 -
> > janhoy - 2021-12-14 13:50:57]
> >  at
> >
> >
> org.apache.solr.update.SolrCmdDistributor.doRequest(SolrCmdDistributor.java:345)
> > ~[solr-core-8.11.1.jar:8.11.1 0b002b11819df70783e83ef36b42ed1223c14b50 -
> > janhoy - 2021-12-14 13:50:55]
> >  at
> >
> >
> org.apache.solr.update.SolrCmdDistributor.lambda$submit$0(SolrCmdDistributor.java:334)
> > ~[solr-core-8.11.1.jar:8.11.1 0b002b11819df70783e83ef36b42ed1223c14b50 -
> > janhoy - 2021-12-14 13:50:55]
> >  at java.util.concurrent.FutureTask.run(FutureTask.java:264) ~[?:?]
> >  at
> java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:539)
> > ~[?:?]
> >  at java.util.concurrent.FutureTask.run(FutureTask.java:264) ~[?:?]
> >  at
> >
> >
> com.codahale.metrics.InstrumentedExecutorService$InstrumentedRunnable.run(InstrumentedExecutorService.java:180)
> > ~[metrics-core-4.1.5.jar:4.1.5]
> >  at
> >
> >
> org.apache.solr.common.util.ExecutorUtil$MDCAwareThreadPoolExecutor.lambda$execute$0(ExecutorUtil.java:218)
> > ~[solr-solrj-8.11.1.jar:8.11.1 0b002b11819df70783e83ef36b42ed1223c14b50 -
> > janhoy - 2021-12-14 13:50:57]
> >  at
> >
> >
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1136)
> > [?:?]
> >  at
> >
> >
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635)
> > [?:?]
> >  at java.lang.Thread.run(Thread.java:833) [?:?] Caused by:
> > java.util.concurrent.RejectedExecutionException: Max requests queued per
> > destination 3000 exceeded for
> > HttpDestination[http://dev-foo3672.bar.no:12621
> > ]@74097d87,queue=3000,pool=MultiplexConnectionPool@310bfd62
> > [c=0/4/4,a=0,i=0,q=3000]
> >  at
> org.eclipse.jetty.client.HttpDestination.send(HttpDestination.java:289)
> > ~[jetty-client-9.4.44.v20210927.jar:9.4.44.v20210927]
> >  at
> org.eclipse.jetty.client.HttpDestination.send(HttpDestination.java:262)
> > ~[jetty-client-9.4.44.v20210927.jar:9.4.44.v20210927]
> >  at org.eclipse.jetty.client.HttpClient.send(HttpClient.java:600)
> > ~[jetty-client-9.4.44.v20210927.jar:9.4.44.v20210927]
> >  at org.eclipse.jetty.client.HttpRequest.sendAsync(HttpRequest.java:778)
> > ~[jetty-client-9.4.44.v20210927.jar:9.4.44.v20210927]
> >  at org.eclipse.jetty.client.HttpRequest.send(HttpRequest.java:765)
> > ~[jetty-client-9.4.44.v20210927.jar:9.4.44.v20210927]
> >  at
> >
> >
> org.apache.solr.client.solrj.impl.Http2SolrClient.request(Http2SolrClient.java:409)
> > ~[solr-solrj-8.11.1.jar:8.11.1 0b002b11819df70783e83ef36b42ed1223c14b50 -
> > janhoy - 2021-12-14 13:50:57]
> >
>

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