Unfortunately my knowledge of Tomcat and Java apps is limited to basic sys admin stuff. I've made the suggestion to the developer to Profile the app. I'm sure this will reveal the problem. I might make an attempt as well.
-----Original Message----- From: Christopher Schultz [mailto:ch...@christopherschultz.net] Sent: Thursday, October 27, 2016 12:03 PM To: Tomcat Users List <users@tomcat.apache.org> Subject: Re: Tomcat 9 exe, High CPU usage due to TCP I/O with itself -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 Mark, On 10/27/16 4:47 AM, Mark Thomas wrote: > On 26/10/2016 18:07, Dustin Delage wrote: >> Tomcat 9, running on Windows Server 2008, runs the CPU at 79% - 90% >> continuously. The only activity is tomcat spamming itself with TCP >> traffic. Same proc ID, out one port, to another port back to itself. > > Tomcat doesn't do that. That looks more likely to be an app issue. > > A series of thread dumps (3 thread dumps, 10 seconds apart) should > provide some pointers as to what is going on. A profiler (e.g. > YourKit) would be better. Tomcat9.exe should be the monitor (procrun), not anything hosting an application, right? - -chris >> A small sample from Process Monitor: >> >> ##################################################################### ##### >> >> ######################################################################## ## >> ################## 10:16:04.7458125 AM Tomcat9.exe 1932 TCP >> Receive 7f00:1::d880:fe03:80fa:ffff:49199 -> >> 7f00:1:ffff:ffff:ffff:ffff:ffff:ffff:49198 SUCCESS Length: 1, >> seqnum: 0, connid: 0 10:16:04.7458374 AM Tomcat9.exe 1932 TCP >> Send Sage-Web03.sage.local:49198 -> Sage-Web03.sage.local:49199 >> SUCCESS Length: 1, startime: 12341635, endtime: 12341635, seqnum: >> 0, connid: 0 10:16:04.7458805 AM Tomcat9.exe 1932 TCP Receive >> 7f00:1::d880:fe03:80fa:ffff:49197 -> >> 7f00:1:ffff:ffff:ffff:ffff:ffff:ffff:49196 SUCCESS Length: 1, >> seqnum: 0, connid: 0 10:16:04.7458972 AM Tomcat9.exe 1932 TCP >> Send Sage-Web03.sage.local:49196 -> Sage-Web03.sage.local:49197 >> SUCCESS Length: 1, startime: 12341635, endtime: 12341635, seqnum: >> 0, connid: 0 10:16:04.7459244 AM Tomcat9.exe 1932 TCP Receive >> 7f00:1::d880:fe03:80fa:ffff:49197 -> >> 7f00:1:ffff:ffff:ffff:ffff:ffff:ffff:49196 SUCCESS Length: 1, >> seqnum: 0, connid: 0 10:16:04.7459507 AM Tomcat9.exe 1932 TCP >> Send Sage-Web03.sage.local:49196 -> Sage-Web03.sage.local:49197 >> SUCCESS Length: 1, startime: 12341635, endtime: 12341635, seqnum: >> 0, connid: 0 >> ##################################################################### ##### >> >> ######################################################################## ## >> ################### >> >> Attaching an image of my findings as well >> >> Thank You, >> >> D Delage >> >> >> >> >> --------------------------------------------------------------------- >> >> To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org >> For additional commands, e-mail: users-h...@tomcat.apache.org >> > > > --------------------------------------------------------------------- > > To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org > For additional commands, e-mail: users-h...@tomcat.apache.org > -----BEGIN PGP SIGNATURE----- Comment: GPGTools - http://gpgtools.org Comment: Using GnuPG with Thunderbird - http://www.enigmail.net/ iQIcBAEBCAAGBQJYEiUyAAoJEBzwKT+lPKRY92oP/jYekQFTj5HaiQsmsQaaWgg+ eGmookPwRATKubROIedjzQA9Y62Y1PL0udQpk5xnEReQ5ISxbUs+OGJtPQippC85 VxILggVIA2ZHuPVd2qEhj1cBb5ppB9n1SsRBFRHU+Y7rdJGp8goIMBZzs1CytR/M vK7xkyDtXzLinerMGj4k/82KnTfCo6nwf+z7Np03Np2doWXYYcZmJO3yo3N/v4lm arp1MEHf1qSutd12ga3MeMXwt8e3WZaK5M1gFL7h7CMclIbgUBz0vGtZ7VYYCB7g qVCzwQi64Jt7HADwllKKLmPC/N3lA3zTQvp/o1z8qsDSYPtbaZNSKNnSoqb4uzx/ 8Z59Y3HZEQudT8gV2GwNzULmGh6Clcn3ECQaUxnK81YZFz0YluO8QbKTMuRM18pb mr8UH/JoPO3PUaBsDvWo95KUZw8m1+YPhvtMCi0r2NTD7j+Klr3r9cHubAHq21Hi VfsGXHm1Pv7vaYVx4za9bREtxEtQZWkQOsjrviYX9lH5n2Ad8QwWOd0fI4HrLBhM 3i/zE7VSOLnCpCZwQ0Dpx7inzVIuXQzmvecdSS6MsuPea3uzNqgSbKoct0A28tTU Em1dBwPuyeHVISnxBtTYufJOeBSBEq/sFW5385QftHLQgwfH4aVouix9U6pLfAF0 +ptjg7u5okrPzuh+6RTx =laEe -----END PGP SIGNATURE----- --------------------------------------------------------------------- To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org --------------------------------------------------------------------- To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
