Re: Too many open files error
-BEGIN PGP SIGNED MESSAGE- Hash: SHA1 Lance, On 8/24/2011 11:21 AM, Campbell, Lance wrote: > Tomcat 6.0.32 Java 1.6.27 Apache 2.0 RedHat 6.x 64 bit > /proc/sys/fs/file-max = 3233344 > > We experienced an issue where we were getting the error "too many > open files" in tomcat. The server manager increase the amount of > open files to the above. But the error kept coming back even > after rebooting the server. Is there a max number of connections > that tomcat should run within based on the above specs? > > The servlet in question that was being hit returned an XML > document after doing a series of database queries. You may find that the problem isn't the number of on-disk files but the number of file descriptors, which might actually have different meanings on your system. It's also possible that the JVM is giving you a spurious message about "too many files" when the problem is really the number of /threads/ -- I've seen that in the past, too. Can you post the exact stack trace that you got along with this error? Also, how about the output of "ulimit -a" for the user that actually runs Tomcat? Finally, what do your elements look like in conf/server.xml? - -chris -BEGIN PGP SIGNATURE- Version: GnuPG v1.4.10 (MingW32) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org/ iEYEARECAAYFAk5VRJ8ACgkQ9CaO5/Lv0PCD1gCgk7+nPVcTrN87QRiceYYYjnfi SdEAoK/4AUixlaSqINfTdnLHty+/zI/B =aigt -END PGP SIGNATURE- - To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
Re: Too many open files error
On Wed, Aug 24, 2011 at 17:33, Campbell, Lance wrote: > The file /etc/security/limits.d is empty. What would be an example of > something you would expect to see in there that would relate to changing the > RMILIT_NFILE value? > It's a directory, not a file. Create a file named tomcat in it (or whatever name you want) and put in these two lines: tomcat softnofile 16384 tomcat hardnofile 16384 (if the user running Tomcat is indeed called tomcat) If you want to see the current limit, as root, run: su tomcat -c "ulimit -n" -- Francis Galiegue ONE2TEAM Ingénieur système Mob : +33 (0) 683 877 875 Tel : +33 (0) 178 945 552 f...@one2team.com 40 avenue Raymond Poincaré 75116 Paris - To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
RE: Too many open files error
The file /etc/security/limits.d is empty. What would be an example of something you would expect to see in there that would relate to changing the RMILIT_NFILE value? Thanks, From: Francis GALIEGUE [f...@one2team.com] Sent: Wednesday, August 24, 2011 10:24 AM To: Tomcat Users List Subject: Re: Too many open files error On Wed, Aug 24, 2011 at 17:21, Campbell, Lance wrote: > Tomcat 6.0.32 > Java 1.6.27 > Apache 2.0 > RedHat 6.x 64 bit > /proc/sys/fs/file-max = 3233344 > > We experienced an issue where we were getting the error "too many open files" > in tomcat. The server manager increase the amount of open files to the > above. But the error kept coming back even after rebooting the server. Is > there a max number of connections that tomcat should run within based on the > above specs? > > The servlet in question that was being hit returned an XML document after > doing a series of database queries. > file-max is not what you want to modify. It's the user's limit: RMILIT_NFILE. Look in /etc/security/limits.d. You'll need to restart Tomcat. -- Francis Galiegue ONE2TEAM Ingénieur système Mob : +33 (0) 683 877 875 Tel : +33 (0) 178 945 552 f...@one2team.com 40 avenue Raymond Poincaré 75116 Paris - 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
Re: Too many open files error
On Wed, Aug 24, 2011 at 17:21, Campbell, Lance wrote: > Tomcat 6.0.32 > Java 1.6.27 > Apache 2.0 > RedHat 6.x 64 bit > /proc/sys/fs/file-max = 3233344 > > We experienced an issue where we were getting the error "too many open files" > in tomcat. The server manager increase the amount of open files to the > above. But the error kept coming back even after rebooting the server. Is > there a max number of connections that tomcat should run within based on the > above specs? > > The servlet in question that was being hit returned an XML document after > doing a series of database queries. > file-max is not what you want to modify. It's the user's limit: RMILIT_NFILE. Look in /etc/security/limits.d. You'll need to restart Tomcat. -- Francis Galiegue ONE2TEAM Ingénieur système Mob : +33 (0) 683 877 875 Tel : +33 (0) 178 945 552 f...@one2team.com 40 avenue Raymond Poincaré 75116 Paris - To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
Too many open files error
Tomcat 6.0.32 Java 1.6.27 Apache 2.0 RedHat 6.x 64 bit /proc/sys/fs/file-max = 3233344 We experienced an issue where we were getting the error "too many open files" in tomcat. The server manager increase the amount of open files to the above. But the error kept coming back even after rebooting the server. Is there a max number of connections that tomcat should run within based on the above specs? The servlet in question that was being hit returned an XML document after doing a series of database queries. Thanks, Lance
Re: Too many open files error -- using tomcat 6.0.14 on RHEL 4
Since you are on a Linux system, use a little utility called "lsof" This one will list all the file descriptor associated with your process. When you get the output, it will point you to where you are using up all your file descriptors. Also, check your "ulimit -n" setting for the user running the java process Filip Kim Albee wrote: We're seeing an error that we didn't see yesterday, but when we modified -Xmx settings for Tomcat, we no cannot get past the issue "Too many open files") and the sites on the server are not serving -- except this error. We've changed the settings back, but any restart causes the same issues. How do we fix this thanks, Kim :-) - To start a new topic, e-mail: users@tomcat.apache.org To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To start a new topic, e-mail: users@tomcat.apache.org To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Too many open files error -- using tomcat 6.0.14 on RHEL 4
We're seeing an error that we didn't see yesterday, but when we modified -Xmx settings for Tomcat, we no cannot get past the issue "Too many open files") and the sites on the server are not serving -- except this error. We've changed the settings back, but any restart causes the same issues. How do we fix this thanks, Kim :-) - To start a new topic, e-mail: users@tomcat.apache.org To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Too Many Open Files error
usually it is added at /etc/security/limits.conf Filip Nix Hanwei wrote: Hi Dan, You can try sysctrl.conf file. Add in the ulimit -n for open files. - Original Message From: Daniel M Garland <[EMAIL PROTECTED]> To: Tomcat Users List Sent: Friday, 19 October 2007 9:43:00 Subject: Re: Too Many Open Files error Thanks Jim, It was previously set to 1024, and I quadrupled it. When you say ulimit is persistent will it persist across a reboot? I don't seem to have the command lsof, I'll try and apt-get it. Cheers Dan Jim Cox wrote: On 10/19/07, Daniel M Garland <[EMAIL PROTECTED]> wrote: Should I then place ulimit -n in the catalina startup scripts? Setting a limit with ulimit is "sticky" (i.e. persistent), so there's no need to stick it in the startup script. However, you didn't answer the previous two questions about (1) how many files did Tomcat have open when you got the "Too many open files" error, and (2) what the current ulimit setting for open files is. If you provide those answers people here can help you out a bit more. - To start a new topic, e-mail: users@tomcat.apache.org To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] __ This email has been scanned by the MessageLabs Email Security System. For more information please visit http://www.messagelabs.com/email __ __ This email has been scanned by the MessageLabs Email Security System. For more information please visit http://www.messagelabs.com/email __ - To start a new topic, e-mail: users@tomcat.apache.org To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] __ Yahoo! Movies - Search movie info and celeb profiles and photos. http://sg.movies.yahoo.com/ - To start a new topic, e-mail: users@tomcat.apache.org To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To start a new topic, e-mail: users@tomcat.apache.org To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Too Many Open Files error
Hi Dan, You can try sysctrl.conf file. Add in the ulimit -n for open files. - Original Message From: Daniel M Garland <[EMAIL PROTECTED]> To: Tomcat Users List Sent: Friday, 19 October 2007 9:43:00 Subject: Re: Too Many Open Files error Thanks Jim, It was previously set to 1024, and I quadrupled it. When you say ulimit is persistent will it persist across a reboot? I don't seem to have the command lsof, I'll try and apt-get it. Cheers Dan Jim Cox wrote: > On 10/19/07, Daniel M Garland <[EMAIL PROTECTED]> wrote: >> Should I then place ulimit -n in the catalina startup scripts? > > Setting a limit with ulimit is "sticky" (i.e. persistent), so there's > no need to stick it in the startup script. > > However, you didn't answer the previous two questions about (1) how > many files did Tomcat have open when you got the "Too many open files" > error, and (2) what the current ulimit setting for open files is. If > you provide those answers people here can help you out a bit more. > > - > To start a new topic, e-mail: users@tomcat.apache.org > To unsubscribe, e-mail: [EMAIL PROTECTED] > For additional commands, e-mail: [EMAIL PROTECTED] > > > __ > This email has been scanned by the MessageLabs Email Security System. > For more information please visit http://www.messagelabs.com/email > __ > __ This email has been scanned by the MessageLabs Email Security System. For more information please visit http://www.messagelabs.com/email __ - To start a new topic, e-mail: users@tomcat.apache.org To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] __ Yahoo! Movies - Search movie info and celeb profiles and photos. http://sg.movies.yahoo.com/ - To start a new topic, e-mail: users@tomcat.apache.org To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Too Many Open Files error
On 10/19/07, Daniel M Garland <[EMAIL PROTECTED]> wrote: > Thanks Jim, > > It was previously set to 1024, and I quadrupled it. When you say ulimit > is persistent will it persist across a reboot? > > I don't seem to have the command lsof, I'll try and apt-get it. > > Cheers > Dan The settings should persist, but there's a chance that a startup script sets it after every reboot (e.g. Fedora has (or at least had) a line to disable core file generation in /etc/profile, I think). Easy enough to test, assuming you can reboot the box. Besides lsof, a quick and dirty way to count the number of open files for a process (in this case "firefox", use Tomcat's pid in place of $(pgrep firefox) in your case): example-prompt$ ls /proc/$(pgrep firefox)/fd | wc -l 75 You didn't supply much detail about Tomcat's usage, but if the open file limit is indeed 1024 (and you don't have a heavily-used server) you might be leaking file handles somewhere in your JSP pages. - To start a new topic, e-mail: users@tomcat.apache.org To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Too Many Open Files error
Thanks Jim, It was previously set to 1024, and I quadrupled it. When you say ulimit is persistent will it persist across a reboot? I don't seem to have the command lsof, I'll try and apt-get it. Cheers Dan Jim Cox wrote: On 10/19/07, Daniel M Garland <[EMAIL PROTECTED]> wrote: Should I then place ulimit -n in the catalina startup scripts? Setting a limit with ulimit is "sticky" (i.e. persistent), so there's no need to stick it in the startup script. However, you didn't answer the previous two questions about (1) how many files did Tomcat have open when you got the "Too many open files" error, and (2) what the current ulimit setting for open files is. If you provide those answers people here can help you out a bit more. - To start a new topic, e-mail: users@tomcat.apache.org To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] __ This email has been scanned by the MessageLabs Email Security System. For more information please visit http://www.messagelabs.com/email __ __ This email has been scanned by the MessageLabs Email Security System. For more information please visit http://www.messagelabs.com/email __ - To start a new topic, e-mail: users@tomcat.apache.org To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Too Many Open Files error
On 10/19/07, Daniel M Garland <[EMAIL PROTECTED]> wrote: > Should I then place ulimit -n in the catalina startup scripts? Setting a limit with ulimit is "sticky" (i.e. persistent), so there's no need to stick it in the startup script. However, you didn't answer the previous two questions about (1) how many files did Tomcat have open when you got the "Too many open files" error, and (2) what the current ulimit setting for open files is. If you provide those answers people here can help you out a bit more. - To start a new topic, e-mail: users@tomcat.apache.org To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Too Many Open Files error
Should I then place ulimit -n in the catalina startup scripts? Jim Cox wrote: On 10/18/07, Daniel M Garland <[EMAIL PROTECTED]> wrote: Hi all I'm seeing a problem on a Tomcat instance: 18-Oct-2007 12:41:47 org.apache.tomcat.util.net.AprEndpoint$Acceptor run SEVERE: Socket accept failed org.apache.tomcat.jni.Error: Too many open files at org.apache.tomcat.jni.Socket.accept(Native Method) at org.apache.tomcat.util.net.AprEndpoint$Acceptor.run(AprEndpoint.java:1001) at java.lang.Thread.run(Thread.java:595) Looking through Google and the advice seems to increase the number of file descriptors. I'm on debian etch and cat /proc/sys/fs/file-max gives 369540 Relevant thing is probably the open file limit for processes -- what does "ulimit -a" return for whatever user you're running Tomcat under? - To start a new topic, e-mail: users@tomcat.apache.org To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] __ This email has been scanned by the MessageLabs Email Security System. For more information please visit http://www.messagelabs.com/email __ __ This email has been scanned by the MessageLabs Email Security System. For more information please visit http://www.messagelabs.com/email __ - To start a new topic, e-mail: users@tomcat.apache.org To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Too Many Open Files error
On 10/18/07, Daniel M Garland <[EMAIL PROTECTED]> wrote: > Hi all > > I'm seeing a problem on a Tomcat instance: > > 18-Oct-2007 12:41:47 org.apache.tomcat.util.net.AprEndpoint$Acceptor run > SEVERE: Socket accept failed > org.apache.tomcat.jni.Error: Too many open files > at org.apache.tomcat.jni.Socket.accept(Native Method) > at > org.apache.tomcat.util.net.AprEndpoint$Acceptor.run(AprEndpoint.java:1001) > at java.lang.Thread.run(Thread.java:595) > > Looking through Google and the advice seems to increase the number of > file descriptors. I'm on debian etch and > > cat /proc/sys/fs/file-max > gives > 369540 Relevant thing is probably the open file limit for processes -- what does "ulimit -a" return for whatever user you're running Tomcat under? - To start a new topic, e-mail: users@tomcat.apache.org To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Too Many Open Files error
Am Donnerstag 18 Oktober 2007 schrieb Daniel M Garland: > Hi all > > I'm seeing a problem on a Tomcat instance: > > 18-Oct-2007 12:41:47 org.apache.tomcat.util.net.AprEndpoint$Acceptor run > SEVERE: Socket accept failed > org.apache.tomcat.jni.Error: Too many open files > at org.apache.tomcat.jni.Socket.accept(Native Method) > at > org.apache.tomcat.util.net.AprEndpoint$Acceptor.run(AprEndpoint.java:1001) > at java.lang.Thread.run(Thread.java:595) > > Looking through Google and the advice seems to increase the number of > file descriptors. I'm on debian etch and > > cat /proc/sys/fs/file-max > gives > 369540 > > I don't believe that I've hit this limit or that increasing this value > would be sensible. > > Given that everything in linux is a file, does this mean that > connections are not being closed properly? Where would be a good place > to start debugging this problem? > > Thanks in advance > Dan > > __ > This email has been scanned by the MessageLabs Email Security System. > For more information please visit http://www.messagelabs.com/email > __ > > - > To start a new topic, e-mail: users@tomcat.apache.org > To unsubscribe, e-mail: [EMAIL PROTECTED] > For additional commands, e-mail: [EMAIL PROTECTED] Hi Dan, try using lsof to check which files or network connections (also counts) you have opened. br, Peter -- Peter Bauer APUS Software G.m.b.H. A-8074 Raaba, Bahnhofstrasse 1/1 Email: [EMAIL PROTECTED] Tel: +43 316 401629 24 Fax: +43 316 401629 9 - To start a new topic, e-mail: users@tomcat.apache.org To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Too Many Open Files error
Hi all I'm seeing a problem on a Tomcat instance: 18-Oct-2007 12:41:47 org.apache.tomcat.util.net.AprEndpoint$Acceptor run SEVERE: Socket accept failed org.apache.tomcat.jni.Error: Too many open files at org.apache.tomcat.jni.Socket.accept(Native Method) at org.apache.tomcat.util.net.AprEndpoint$Acceptor.run(AprEndpoint.java:1001) at java.lang.Thread.run(Thread.java:595) Looking through Google and the advice seems to increase the number of file descriptors. I'm on debian etch and cat /proc/sys/fs/file-max gives 369540 I don't believe that I've hit this limit or that increasing this value would be sensible. Given that everything in linux is a file, does this mean that connections are not being closed properly? Where would be a good place to start debugging this problem? Thanks in advance Dan __ This email has been scanned by the MessageLabs Email Security System. For more information please visit http://www.messagelabs.com/email __ - To start a new topic, e-mail: users@tomcat.apache.org To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
