Am 22.06.20 um 13:22 schrieb Ayub Khan: > Felix, > > I executed ls -l /proc/$(cat /var/run/tomcat8.pid)/fd/ and from the output > I see majority of them are related to sockets as shown below, some of them > point to the jar file of tomcat and others to the log file which is created. > > socket:[2084570754] > socket:[2084579487] > socket:[2084578478] > socket:[2084570167]
Can you try the other command (lsof -p $(cat ...tomcat.pid))? It should give a bit more details on the used sockets that the proc directory. Felix > > On Mon, Jun 22, 2020 at 1:28 PM Felix Schumacher < > felix.schumac...@internetallee.de> wrote: > >> Am 22.06.20 um 11:41 schrieb Ayub Khan: >>> 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" >> You could have a look at the name of the files in the pids proc directory. >> >> $ ls -l /proc/$(cat /var/run/tomcat8.pid)/fd/ >> >> Or you could use the tool lsof to find the open file descriptors. >> >> $ lsof -p $(cat /var/run/tomcat8.pid) >> >> For both calls you should first change to the uid of the tomcat user or >> use sudo as in your example. >> >> Felix >> >>> Thanks and Regards >>> Ayub >>> >>> On Sun, Jun 21, 2020 at 8:18 PM Christopher Schultz < >>> ch...@christopherschultz.net> wrote: >>> >>> 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 >>>>>>> >>>>>>> >>>> --------------------------------------------------------------------- >>>> 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 >> >> --------------------------------------------------------------------- To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
