-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 Issac,
On 2/27/14, 6:23 PM, Isaac Gonzalez wrote: > > -----Original Message----- From: Konstantin Kolinko > [mailto:knst.koli...@gmail.com] Sent: Thursday, February 27, 2014 > 2:40 PM To: Tomcat Users List Subject: Re: tomcat 6 refuses mod_jk > connections after server runs for a couple of days > > 2014-02-28 2:06 GMT+04:00 Isaac Gonzalez > <igonza...@autoreturn.com>: >> Hi Christopher(and Konstantin), attached is a couple of thread >> dumps of when we experienced the issue again today. I also >> noticed we get this message right before the problem occurs: Feb >> 27, 2014 12:47:15 PM >> org.apache.tomcat.util.threads.ThreadPool$ControlRunnable run >> SEVERE: Caught exception (java.lang.OutOfMemoryError: unable to >> create new native thread) executing >> org.apache.jk.common.ChannelSocket$SocketAcceptor@177ddea, >> terminating thread > > That explains why a connection cannot be accepted. > > I wonder are you hitting an "ulimit" limit, or there is just not > enough free memory to allocate stack area for a new thread (which > size is set by -Xss option to java executable). > > I thought of the ulimit settings and increased it to the upward > limit allowed at the end of last weekend: [root@server ~]# su > tomcat [tomcat@server root]$ ulimit -a core file size > (blocks, -c) 0 data seg size (kbytes, -d) unlimited > scheduling priority (-e) 0 file size > (blocks, -f) unlimited pending signals (-i) 62835 > max locked memory (kbytes, -l) 64 max memory size > (kbytes, -m) unlimited open files (-n) 65535 Open-files can sometimes be a problem. This setting looks just fine to me, though. > pipe size (512 bytes, -p) 8 POSIX message queues > (bytes, -q) 819200 real-time priority (-r) 0 stack > size (kbytes, -s) 10240 cpu time > (seconds, -t) unlimited max user processes (-u) 1024 You might want to increase this number. How many processes is "tomcat" running outside of the JVM? This is likely to be the limit you are hitting. - -chris -----BEGIN PGP SIGNATURE----- Version: GnuPG v1 Comment: GPGTools - http://gpgtools.org Comment: Using GnuPG with Thunderbird - http://www.enigmail.net/ iQIcBAEBCAAGBQJTEOY2AAoJEBzwKT+lPKRYmAwP+wVF9fwj88SOXxWTEKXdbk01 a9slFh4LmnDn0tacrAmA3m47VsndF3ewHwIEF1yP7wNRYf3NXSCzVp0OWuji6ZU1 yfjPpBT3pI8dVPqu9hkWVxkvQxA5xL0sm+9L2BeVBW0QbLs69L0g/v3xt2LwMxvF j/9mZNqW6A177ZG1o5wcdexRhzV2566Z3idWdc8Zp9uISwFdZXdzYxJtTiku9k6q nV3gQ8ICAwI+VGBKc1DwbL6QqUwpY8O7OjmQ5OEJaqHYEXjVNkdgo87oY+2BXRkV 9BW9J1zHLPAi8UhdfumDeqRKBQ7JPRhRLGGrhAHsmmA+G0XzShzU2zY84s5PSGU8 GwNiNZ/NJpTPtYjV5viY3GdWWbyeO9J4VDUBsBbs8k1XN7a44OjmKpRhnVIlQT6z XLYfg3GpWjK8Xdd2L81RB/O6Q2xn9jY5FMik8jh0HgDm38Wf4AeymhVdEaEfVT5Z TdAQECOFeYGDgLHNY7sFr/QQfJkLAFhfNM9xcgDTx4WcUH9V4QMn8S2qjOeFPbgx hqwg+p2au18JMTb+RkmnHAVIcqtiFtUU/dN9Xap/vH+bc8UKimE87brBlnTnD/pk uW0ea5m4f6MDcX2hDSh4+1ZU5uI0ZqTMvcp445UE0GW/4ITu9iauVedvM9fUlVlt fzDyTTTEUHZ10n+yF5XC =kOiz -----END PGP SIGNATURE----- --------------------------------------------------------------------- To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
