Chris, I am using HikariCP for connection pooling. If the database is leaking connections then I should see connection not available exception.
How do I find out which file descriptors are leaking ? these are not files open on disk as there is no explicit disk file I/O in this application. I just use the below command to check for open file descriptors: watch "sudo ls /proc/`cat /var/run/tomcat8.pid`/fd/ | wc -l" Thanks and Regards Ayub On Sun, Jun 21, 2020 at 8:18 PM Christopher Schultz < ch...@christopherschultz.net> wrote: > -----BEGIN PGP SIGNED MESSAGE----- > Hash: SHA256 > > Ayub, > > On 6/20/20 11:51, Ayub Khan wrote: > > Sorry we are using 8.0.32 version of tomcat. > > > > below is the configuration: > > > > Server version: Apache Tomcat/8.0.32 (Ubuntu) Server built: Jan > > 24 2020 16:24:30 UTC Server number: 8.0.32.0 OS Name: > > Linux OS Version: 4.4.0-1087-aws Architecture: amd64 JVM > > Version: 1.8.0_181-b13 JVM Vendor: Oracle Corporation > > > > I use the below command to check the file descriptors: > > > > watch "sudo ls /proc/`cat /var/run/tomcat8.pid`/fd/ | wc -l" > > So you know there is some kind of increase in file-handle use, but you > don't know what types of file handles are increasing, right? > > Can you try to find out which kinds of file handles are increasing? > > I have a sneaking suspicion that it's your database connections and > not actually files open on the disk. > > Are you using a database connection pool? If not, you should really > use one and limit the number of connections to something sane. If you > are using one, are you monitoring it to see how many connections are > actually being used? Are you sure you are using proper resource > management[1]? Even a single code-path that leaks connections can leak > them quickly under load. > > > When there an issue related to broken files, this value keeps > > increasing, the only way to bring it down is to remove vm instance > > from AWS load balancer.> Which version of tomcat should I install > > ? > > Tomcat 8.0.x hasn't been supported since its last release on 29 June > 2018. That was 8.0.53. Your release is from 8 February 2016 and is > dangerously out of date (unless you are using the Ubuntu-packaged > version, in which case I hope they kept-up with security patches thee > past 4 years). > > - -chris > > > On Sat, Jun 20, 2020 at 6:28 PM Christopher Schultz < > > ch...@christopherschultz.net> wrote: > > > > Ayub, > > > > On 6/19/20 16:46, Ayub Khan wrote: > >>>> tomcat 8.5 broken pipe increases open files on ubuntu AWS > > > > Which exact version of Tomcat 8.5? If you aren't running the > > latest version (8.5.56), please upgrade and re-test. > > > >>>> If there is slow response from db I see this stack trace and > >>>> the open files goes high and the only way to open files go > >>>> down is to remove the instance from Amazon load balancer. > >>>> > >>>> Is there a way to keep the open files low even when Broken > >>>> pipe error is thrown ? > > > > What is your evidence that file handles are being left open? > > > > Which file handles are being left open? > > > > -chris > >> > >> --------------------------------------------------------------------- > >> > >> > To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org > >> For additional commands, e-mail: users-h...@tomcat.apache.org > >> > >> > > > -----BEGIN PGP SIGNATURE----- > Comment: Using GnuPG with Thunderbird - https://www.enigmail.net/ > > iQIzBAEBCAAdFiEEMmKgYcQvxMe7tcJcHPApP6U8pFgFAl7vlj0ACgkQHPApP6U8 > pFiCqBAAqDO2+sUHpjcL8c5qwQbc0EG1XjgawI/ggjegVNSLTZ6mjdCVmxU3V10T > IAdAmckT+o5qkZKQSVAQHpNW7i5A21U0dOUF1r1EWq0WZIN3fE1dcpQVsOlvUSqD > qZ+gnGzg3UasSMJFyOj2hnU1+PBnhSFWvKcHwTda9gelqmgHp24rwpCvHFFFmH+2 > I/QrHoQc1W9F0bUmGOsfBy5+eC981KMUfZrIJmUBQFOhopaD19W+yofZCl0S15E7 > dxfIcqvFSF7FzZ1FraKGVd+nEUlW6PLuNqHkqpNGIstMWuQuo1RkukdXeP3FqjeA > 36W5GOo6tlJTPGjbGaVPLnKw+hQuQa9he5Dv4E03C9vk1cbU6g+3hguKGhIfV3FM > 2Pg4SE4LwVv3LMY1uxuuHGPgrs6CqHmMaDA6FQARhm/5iD5WJQBrXwzCYztHK/Z+ > +QILfdBa1VZl9qyujBneY9oJ9yc7HeBb1DDZAAqZFrOJctRmDrdZQrUwZ+b6vUzL > kBr7fCSnzEqUbPzv5DiY6qfD2x2f1GfJFLY6LuJ36g4P0YSItRTaR2nX/VOzVM9D > oZsDFZhlSZa0U7KpdaQDpi1dw6wgW83gfc7GxrbYvQsgXZPnm25JeU/UI5p1O+cQ > q+iynFZ8poxSOIjx+2A9anwCXAiiWbyVRJ6Rmy2NwkCbXH/VhwY= > =oNTV > -----END PGP SIGNATURE----- > > --------------------------------------------------------------------- > To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org > For additional commands, e-mail: users-h...@tomcat.apache.org > > -- -------------------------------------------------------------------- Sun Certified Enterprise Architect 1.5 Sun Certified Java Programmer 1.4 Microsoft Certified Systems Engineer 2000 http://in.linkedin.com/pub/ayub-khan/a/811/b81 mobile:+966-502674604 ---------------------------------------------------------------------- It is proved that Hard Work and kowledge will get you close but attitude will get you there. However, it's the Love of God that will put you over the top!!
