On 03.10.2009 20:07, Joe Hansen wrote: > Hey All, > > I get this error (java.lang.OutOfMemoryError: Java heap space) after > my Apache 2.0/Tomcat 5.5/mod_jk installation has been up and running > for a few hours. This problem started just since two days. Never had > this issue before! > > I have also noticed that as soon as I startup the server, 9 httpd > processes start. Number of httpd processes keep on increasing until I > get the OutOfMemoryError. > $ps -aef | grep httpd > root 31984 1 0 11:23 ? 00:00:00 /usr/sbin/httpd > apache 31987 31984 0 11:23 ? 00:00:00 /usr/sbin/httpd > apache 31988 31984 0 11:23 ? 00:00:00 /usr/sbin/httpd > apache 31989 31984 0 11:23 ? 00:00:00 /usr/sbin/httpd > apache 31990 31984 0 11:23 ? 00:00:00 /usr/sbin/httpd > apache 31991 31984 0 11:23 ? 00:00:00 /usr/sbin/httpd > apache 31992 31984 0 11:23 ? 00:00:00 /usr/sbin/httpd > apache 31993 31984 0 11:23 ? 00:00:00 /usr/sbin/httpd > apache 31994 31984 0 11:23 ? 00:00:00 /usr/sbin/httpd
Sounds like requests get stuck or responses are only returned very slowly. I would take thread dumps during the time requests pile up (e.g. httpd process count increases). Thread dumps are generated by "kil -QUIT" against the Tomcat process. Result is written to catalina.out. Always take afew thread dumps shortly after each other, e.g. 3 dumps each 3 seconds apart from the previous one, so that you can find out, if a status in a dump is pure coincidence or lasts for somewhat longer. > $ps -aef | grep tomcat > root 31949 1 43 11:23 pts/0 00:00:58 /usr/java/jdk/bin/java > -Djava.u > il.logging.manager=org.apache.juli.ClassLoaderLogManager > -Djava.util.logging.co > fig.file=/usr/lib/apache-tomcat/conf/logging.properties > -Djava.endorsed.dirs=/u > r/lib/apache-tomcat/common/endorsed -classpath > :/usr/lib/apache-tomcat/bin/boot > trap.jar:/usr/lib/apache-tomcat/bin/commons-logging-api.jar > -Dcatalina.base=/us > /lib/apache-tomcat -Dcatalina.home=/usr/lib/apache-tomcat > -Djava.io.tmpdir=/usr > lib/apache-tomcat/temp org.apache.catalina.startup.Bootstrap start There is no Java memory configuration included above (i.e. al defaults). It might well be, that you have to explicitely set heap size, perm size and if you like also eden and semi spaces. > Can someone on this list please help me resolve this issue. > > Thanks you, > Joe Regards, Rainer --------------------------------------------------------------------- To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
