apache tomcat shuts down after few hours

[vaibhav more]

i have installed apache-tomcat-6.0.29 on linux. It hosts a web service that is running an important functionality. i have written a cron tab that restarts the server after every 24 hours. After some random duration i am not able to access web service. i check if the apache service is running by using command.
ps -ef | grep apache

i get result
omfprod 9694 1080 0 11:30 pts/4 00:00:00 grep apache

Now i go into $CATALINA_HOME/bin directory and use following shells
startup.sh

i again check processes
ps -ef | grep apache

i get the result
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
omfprod 1126 1 0 11:42 pts/4 00:00:00 /usr/bin/java -Djava.util.logging.config.file=/user/omfprod/application_server/apache-tomcat-6.0.29/conf/logging.properties -Djava.util.logging.manager=org.apache.juli.ClassLoaderLogManager -Djava.endorsed.dirs=/user/omfprod/application_server/apache-tomcat-6.0.29/endorsed -classpath /user/omfprod/application_server/apache-tomcat-6.0.29/bin/bootstrap.jar -Dcatalina.base=/user/omfprod/application_server/apache-tomcat-6.0.29 -Dcatalina.home=/user/omfprod/application_server/apache-tomcat-6.0.29 -Djava.io.tmpdir=/user/omfprod/application_server/apache-tomcat-6.0.29/temp org.apache.catalina.startup.Bootstrap start
omfprod 1136 1126 0 11:42 pts/4 00:00:00 /usr/bin/java -Djava.util.logging.config.file=/user/omfprod/application_server/apache-tomcat-6.0.29/conf/logging.properties -Djava.util.logging.manager=org.apache.juli.ClassLoaderLogManager -Djava.endorsed.dirs=/user/omfprod/application_server/apache-tomcat-6.0.29/endorsed -classpath /user/omfprod/application_server/apache-tomcat-6.0.29/bin/bootstrap.jar -Dcatalina.base=/user/omfprod/application_server/apache-tomcat-6.0.29 -Dcatalina.home=/user/omfprod/application_server/apache-tomcat-6.0.29 -Djava.io.tmpdir=/user/omfprod/application_server/apache-tomcat-6.0.29/temp org.apache.catalina.startup.Bootstrap start
omfprod 1137 1136 13 11:42 pts/4 00:00:01 /usr/bin/java -Djava.util.logging.config.file=/user/omfprod/application_server/apache-tomcat-6.0.29/conf/logging.properties -Djava.util.logging.manager=org.apache.juli.ClassLoaderLogManager -Djava.endorsed.dirs=/user/omfprod/application_server/apache-tomcat-6.0.29/endorsed -classpath /user/omfprod/application_server/apache-tomcat-6.0.29/bin/bootstrap.jar -Dcatalina.base=/user/omfprod/application_server/apache-tomcat-6.0.29 -Dcatalina.home=/user/omfprod/application_server/apache-tomcat-6.0.29 -Djava.io.tmpdir=/user/omfprod/application_server/apache-tomcat-6.0.29/temp org.apache.catalina.startup.Bootstrap start
omfprod 1143 1136 0 11:42 pts/4 00:00:00 /usr/bin/java -Djava.util.logging.config.file=/user/omfprod/application_server/apache-tomcat-6.0.29/conf/logging.properties -Djava.util.logging.manager=org.apache.juli.ClassLoaderLogManager -Djava.endorsed.dirs=/user/omfprod/application_server/apache-tomcat-6.0.29/endorsed -classpath /user/omfprod/application_server/apache-tomcat-6.0.29/bin/bootstrap.jar -Dcatalina.base=/user/omfprod/application_server/apache-tomcat-6.0.29 -Dcatalina.home=/user/omfprod/application_server/apache-tomcat-6.0.29 -Djava.io.tmpdir=/user/omfprod/application_server/apache-tomcat-6.0.29/temp org.apache.catalina.startup.Bootstrap start
omfprod 1144 1136 0 11:42 pts/4 00:00:00 /usr/bin/java -Djava.util.logging.config.file=/user/omfprod/application_server/apache-tomcat-6.0.29/conf/logging.properties -Djava.util.logging.manager=org.apache.juli.ClassLoaderLogManager -Djava.endorsed.dirs=/user/omfprod/application_server/apache-tomcat-6.0.29/endorsed -classpath /user/omfprod/application_server/apache-tomcat-6.0.29/bin/bootstrap.jar -Dcatalina.base=/user/omfprod/application_server/apache-tomcat-6.0.29 -Dcatalina.home=/user/omfprod/application_server/apache-tomcat-6.0.29 -Djava.io.tmpdir=/user/omfprod/application_server/apache-tomcat-6.0.29/temp org.apache.catalina.startup.Bootstrap start
omfprod 1145 1136 0 11:42 pts/4 00:00:00 /usr/bin/java -Djava.util.logging.config.file=/user/omfprod/application_server/apache-tomcat-6.0.29/conf/logging.properties -Djava.util.logging.manager=org.apache.juli.ClassLoaderLogManager -Djava.endorsed.dirs=/user/omfprod/application_server/apache-tomcat-6.0.29/endorsed -classpath /user/omfprod/application_server/apache-tomcat-6.0.29/bin/bootstrap.jar -Dcatalina.base=/user/omfprod/application_server/apache-tomcat-6.0.29 -Dcatalina.home=/user/omfprod/application_server/apache-tomcat-6.0.29 -Djava.io.tmpdir=/user/omfprod/application_server/apache-tomcat-6.0.29/temp org.apache.catalina.startup.Bootstrap start
omfprod 1146 1136 0 11:42 pts/4 00:00:00 /usr/bin/java -Djava.util.logging.config.file=/user/omfprod/application_server/apache-tomcat-6.0.29/conf/logging.properties -Djava.util.logging.manager=org.apache.juli.ClassLoaderLogManager -Djava.endorsed.dirs=/user/omfprod/application_server/apache-tomcat-6.0.29/endorsed -classpath /user/omfprod/application_server/apache-tomcat-6.0.29/bin/bootstrap.jar -Dcatalina.base=/user/omfprod/application_server/apache-tomcat-6.0.29 -Dcatalina.home=/user/omfprod/application_server/apache-tomcat-6.0.29 -Djava.io.tmpdir=/user/omfprod/application_server/apache-tomcat-6.0.29/temp org.apache.catalina.startup.Bootstrap start
omfprod 1147 1136 0 11:42 pts/4 00:00:00 /usr/bin/java -Djava.util.logging.config.file=/user/omfprod/application_server/apache-tomcat-6.0.29/conf/logging.properties -Djava.util.logging.manager=org.apache.juli.ClassLoaderLogManager -Djava.endorsed.dirs=/user/omfprod/application_server/apache-tomcat-6.0.29/endorsed -classpath /user/omfprod/application_server/apache-tomcat-6.0.29/bin/bootstrap.jar -Dcatalina.base=/user/omfprod/application_server/apache-tomcat-6.0.29 -Dcatalina.home=/user/omfprod/application_server/apache-tomcat-6.0.29 -Djava.io.tmpdir=/user/omfprod/application_server/apache-tomcat-6.0.29/temp org.apache.catalina.startup.Bootstrap start
omfprod 1148 1136 0 11:42 pts/4 00:00:00 /usr/bin/java -Djava.util.logging.config.file=/user/omfprod/application_server/apache-tomcat-6.0.29/conf/logging.properties -Djava.util.logging.manager=org.apache.juli.ClassLoaderLogManager -Djava.endorsed.dirs=/user/omfprod/application_server/apache-tomcat-6.0.29/endorsed -classpath /user/omfprod/application_server/apache-tomcat-6.0.29/bin/bootstrap.jar -Dcatalina.base=/user/omfprod/application_server/apache-tomcat-6.0.29 -Dcatalina.home=/user/omfprod/application_server/apache-tomcat-6.0.29 -Djava.io.tmpdir=/user/omfprod/application_server/apache-tomcat-6.0.29/temp org.apache.catalina.startup.Bootstrap start
omfprod 1149 1136 0 11:42 pts/4 00:00:00 /usr/bin/java -Djava.util.logging.config.file=/user/omfprod/application_server/apache-tomcat-6.0.29/conf/logging.properties -Djava.util.logging.manager=org.apache.juli.ClassLoaderLogManager -Djava.endorsed.dirs=/user/omfprod/application_server/apache-tomcat-6.0.29/endorsed -classpath /user/omfprod/application_server/apache-tomcat-6.0.29/bin/bootstrap.jar -Dcatalina.base=/user/omfprod/application_server/apache-tomcat-6.0.29 -Dcatalina.home=/user/omfprod/application_server/apache-tomcat-6.0.29 -Djava.io.tmpdir=/user/omfprod/application_server/apache-tomcat-6.0.29/temp org.apache.catalina.startup.Bootstrap start
omfprod 1150 1136 0 11:42 pts/4 00:00:00 /usr/bin/java -Djava.util.logging.config.file=/user/omfprod/application_server/apache-tomcat-6.0.29/conf/logging.properties -Djava.util.logging.manager=org.apache.juli.ClassLoaderLogManager -Djava.endorsed.dirs=/user/omfprod/application_server/apache-tomcat-6.0.29/endorsed -classpath /user/omfprod/application_server/apache-tomcat-6.0.29/bin/bootstrap.jar -Dcatalina.base=/user/omfprod/application_server/apache-tomcat-6.0.29 -Dcatalina.home=/user/omfprod/application_server/apache-tomcat-6.0.29 -Djava.io.tmpdir=/user/omfprod/application_server/apache-tomcat-6.0.29/temp org.apache.catalina.startup.Bootstrap start
omfprod 1151 1136 0 11:42 pts/4 00:00:00 /usr/bin/java -Djava.util.logging.config.file=/user/omfprod/application_server/apache-tomcat-6.0.29/conf/logging.properties -Djava.util.logging.manager=org.apache.juli.ClassLoaderLogManager -Djava.endorsed.dirs=/user/omfprod/application_server/apache-tomcat-6.0.29/endorsed -classpath /user/omfprod/application_server/apache-tomcat-6.0.29/bin/bootstrap.jar -Dcatalina.base=/user/omfprod/application_server/apache-tomcat-6.0.29 -Dcatalina.home=/user/omfprod/application_server/apache-tomcat-6.0.29 -Djava.io.tmpdir=/user/omfprod/application_server/apache-tomcat-6.0.29/temp org.apache.catalina.startup.Bootstrap start
omfprod 1152 1136 0 11:42 pts/4 00:00:00 /usr/bin/java -Djava.util.logging.config.file=/user/omfprod/application_server/apache-tomcat-6.0.29/conf/logging.properties -Djava.util.logging.manager=org.apache.juli.ClassLoaderLogManager -Djava.endorsed.dirs=/user/omfprod/application_server/apache-tomcat-6.0.29/endorsed -classpath /user/omfprod/application_server/apache-tomcat-6.0.29/bin/bootstrap.jar -Dcatalina.base=/user/omfprod/application_server/apache-tomcat-6.0.29 -Dcatalina.home=/user/omfprod/application_server/apache-tomcat-6.0.29 -Djava.io.tmpdir=/user/omfprod/application_server/apache-tomcat-6.0.29/temp org.apache.catalina.startup.Bootstrap start
omfprod 1157 1136 0 11:42 pts/4 00:00:00 /usr/bin/java -Djava.util.logging.config.file=/user/omfprod/application_server/apache-tomcat-6.0.29/conf/logging.properties -Djava.util.logging.manager=org.apache.juli.ClassLoaderLogManager -Djava.endorsed.dirs=/user/omfprod/application_server/apache-tomcat-6.0.29/endorsed -classpath /user/omfprod/application_server/apache-tomcat-6.0.29/bin/bootstrap.jar -Dcatalina.base=/user/omfprod/application_server/apache-tomcat-6.0.29 -Dcatalina.home=/user/omfprod/application_server/apache-tomcat-6.0.29 -Djava.io.tmpdir=/user/omfprod/application_server/apache-tomcat-6.0.29/temp org.apache.catalina.startup.Bootstrap start
omfprod 1159 1136 0 11:42 pts/4 00:00:00 /usr/bin/java -Djava.util.logging.config.file=/user/omfprod/application_server/apache-tomcat-6.0.29/conf/logging.properties -Djava.util.logging.manager=org.apache.juli.ClassLoaderLogManager -Djava.endorsed.dirs=/user/omfprod/application_server/apache-tomcat-6.0.29/endorsed -classpath /user/omfprod/application_server/apache-tomcat-6.0.29/bin/bootstrap.jar -Dcatalina.base=/user/omfprod/application_server/apache-tomcat-6.0.29 -Dcatalina.home=/user/omfprod/application_server/apache-tomcat-6.0.29 -Djava.io.tmpdir=/user/omfprod/application_server/apache-tomcat-6.0.29/temp org.apache.catalina.startup.Bootstrap start
omfprod 1160 1136 0 11:42 pts/4 00:00:00 /usr/bin/java -Djava.util.logging.config.file=/user/omfprod/application_server/apache-tomcat-6.0.29/conf/logging.properties -Djava.util.logging.manager=org.apache.juli.ClassLoaderLogManager -Djava.endorsed.dirs=/user/omfprod/application_server/apache-tomcat-6.0.29/endorsed -classpath /user/omfprod/application_server/apache-tomcat-6.0.29/bin/bootstrap.jar -Dcatalina.base=/user/omfprod/application_server/apache-tomcat-6.0.29 -Dcatalina.home=/user/omfprod/application_server/apache-tomcat-6.0.29 -Djava.io.tmpdir=/user/omfprod/application_server/apache-tomcat-6.0.29/temp org.apache.catalina.startup.Bootstrap start
omfprod 1178 1136 0 11:42 pts/4 00:00:00 /usr/bin/java -Djava.util.logging.config.file=/user/omfprod/application_server/apache-tomcat-6.0.29/conf/logging.properties -Djava.util.logging.manager=org.apache.juli.ClassLoaderLogManager -Djava.endorsed.dirs=/user/omfprod/application_server/apache-tomcat-6.0.29/endorsed -classpath /user/omfprod/application_server/apache-tomcat-6.0.29/bin/bootstrap.jar -Dcatalina.base=/user/omfprod/application_server/apache-tomcat-6.0.29 -Dcatalina.home=/user/omfprod/application_server/apache-tomcat-6.0.29 -Djava.io.tmpdir=/user/omfprod/application_server/apache-tomcat-6.0.29/temp org.apache.catalina.startup.Bootstrap start
omfprod 1179 1136 12 11:42 pts/4 00:00:01 /usr/bin/java -Djava.util.logging.config.file=/user/omfprod/application_server/apache-tomcat-6.0.29/conf/logging.properties -Djava.util.logging.manager=org.apache.juli.ClassLoaderLogManager -Djava.endorsed.dirs=/user/omfprod/application_server/apache-tomcat-6.0.29/endorsed -classpath /user/omfprod/application_server/apache-tomcat-6.0.29/bin/bootstrap.jar -Dcatalina.base=/user/omfprod/application_server/apache-tomcat-6.0.29 -Dcatalina.home=/user/omfprod/application_server/apache-tomcat-6.0.29 -Djava.io.tmpdir=/user/omfprod/application_server/apache-tomcat-6.0.29/temp org.apache.catalina.startup.Bootstrap start
omfprod 1181 1136 11 11:42 pts/4 00:00:01 /usr/bin/java -Djava.util.logging.config.file=/user/omfprod/application_server/apache-tomcat-6.0.29/conf/logging.properties -Djava.util.logging.manager=org.apache.juli.ClassLoaderLogManager -Djava.endorsed.dirs=/user/omfprod/application_server/apache-tomcat-6.0.29/endorsed -classpath /user/omfprod/application_server/apache-tomcat-6.0.29/bin/bootstrap.jar -Dcatalina.base=/user/omfprod/application_server/apache-tomcat-6.0.29 -Dcatalina.home=/user/omfprod/application_server/apache-tomcat-6.0.29 -Djava.io.tmpdir=/user/omfprod/application_server/apache-tomcat-6.0.29/temp org.apache.catalina.startup.Bootstrap start
omfprod 1182 1136 0 11:42 pts/4 00:00:00 /usr/bin/java -Djava.util.logging.config.file=/user/omfprod/application_server/apache-tomcat-6.0.29/conf/logging.properties -Djava.util.logging.manager=org.apache.juli.ClassLoaderLogManager -Djava.endorsed.dirs=/user/omfprod/application_server/apache-tomcat-6.0.29/endorsed -classpath /user/omfprod/application_server/apache-tomcat-6.0.29/bin/bootstrap.jar -Dcatalina.base=/user/omfprod/application_server/apache-tomcat-6.0.29 -Dcatalina.home=/user/omfprod/application_server/apache-tomcat-6.0.29 -Djava.io.tmpdir=/user/omfprod/application_server/apache-tomcat-6.0.29/temp org.apache.catalina.startup.Bootstrap start
omfprod 1183 1136 0 11:42 pts/4 00:00:00 /usr/bin/java -Djava.util.logging.config.file=/user/omfprod/application_server/apache-tomcat-6.0.29/conf/logging.properties -Djava.util.logging.manager=org.apache.juli.ClassLoaderLogManager -Djava.endorsed.dirs=/user/omfprod/application_server/apache-tomcat-6.0.29/endorsed -classpath /user/omfprod/application_server/apache-tomcat-6.0.29/bin/bootstrap.jar -Dcatalina.base=/user/omfprod/application_server/apache-tomcat-6.0.29 -Dcatalina.home=/user/omfprod/application_server/apache-tomcat-6.0.29 -Djava.io.tmpdir=/user/omfprod/application_server/apache-tomcat-6.0.29/temp org.apache.catalina.startup.Bootstrap start
omfprod 1471 1136 0 11:42 pts/4 00:00:00 /usr/bin/java -Djava.util.logging.config.file=/user/omfprod/application_server/apache-tomcat-6.0.29/conf/logging.properties -Djava.util.logging.manager=org.apache.juli.ClassLoaderLogManager -Djava.endorsed.dirs=/user/omfprod/application_server/apache-tomcat-6.0.29/endorsed -classpath /user/omfprod/application_server/apache-tomcat-6.0.29/bin/bootstrap.jar -Dcatalina.base=/user/omfprod/application_server/apache-tomcat-6.0.29 -Dcatalina.home=/user/omfprod/application_server/apache-tomcat-6.0.29 -Djava.io.tmpdir=/user/omfprod/application_server/apache-tomcat-6.0.29/temp org.apache.catalina.startup.Bootstrap start
omfprod 1821 1136 0 11:42 pts/4 00:00:00 /usr/bin/java -Djava.util.logging.config.file=/user/omfprod/application_server/apache-tomcat-6.0.29/conf/logging.properties -Djava.util.logging.manager=org.apache.juli.ClassLoaderLogManager -Djava.endorsed.dirs=/user/omfprod/application_server/apache-tomcat-6.0.29/endorsed -classpath /user/omfprod/application_server/apache-tomcat-6.0.29/bin/bootstrap.jar -Dcatalina.base=/user/omfprod/application_server/apache-tomcat-6.0.29 -Dcatalina.home=/user/omfprod/application_server/apache-tomcat-6.0.29 -Djava.io.tmpdir=/user/omfprod/application_server/apache-tomcat-6.0.29/temp org.apache.catalina.startup.Bootstrap start
omfprod 1832 1136 0 11:42 pts/4 00:00:00 /usr/bin/java -Djava.util.logging.config.file=/user/omfprod/application_server/apache-tomcat-6.0.29/conf/logging.properties -Djava.util.logging.manager=org.apache.juli.ClassLoaderLogManager -Djava.endorsed.dirs=/user/omfprod/application_server/apache-tomcat-6.0.29/endorsed -classpath /user/omfprod/application_server/apache-tomcat-6.0.29/bin/bootstrap.jar -Dcatalina.base=/user/omfprod/application_server/apache-tomcat-6.0.29 -Dcatalina.home=/user/omfprod/application_server/apache-tomcat-6.0.29 -Djava.io.tmpdir=/user/omfprod/application_server/apache-tomcat-6.0.29/temp org.apache.catalina.startup.Bootstrap start
omfprod 1851 1136 0 11:42 pts/4 00:00:00 /usr/bin/java -Djava.util.logging.config.file=/user/omfprod/application_server/apache-tomcat-6.0.29/conf/logging.properties -Djava.util.logging.manager=org.apache.juli.ClassLoaderLogManager -Djava.endorsed.dirs=/user/omfprod/application_server/apache-tomcat-6.0.29/endorsed -classpath /user/omfprod/application_server/apache-tomcat-6.0.29/bin/bootstrap.jar -Dcatalina.base=/user/omfprod/application_server/apache-tomcat-6.0.29 -Dcatalina.home=/user/omfprod/application_server/apache-tomcat-6.0.29 -Djava.io.tmpdir=/user/omfprod/application_server/apache-tomcat-6.0.29/temp org.apache.catalina.startup.Bootstrap start
omfprod 1852 1136 0 11:42 pts/4 00:00:00 /usr/bin/java -Djava.util.logging.config.file=/user/omfprod/application_server/apache-tomcat-6.0.29/conf/logging.properties -Djava.util.logging.manager=org.apache.juli.ClassLoaderLogManager -Djava.endorsed.dirs=/user/omfprod/application_server/apache-tomcat-6.0.29/endorsed -classpath /user/omfprod/application_server/apache-tomcat-6.0.29/bin/bootstrap.jar -Dcatalina.base=/user/omfprod/application_server/apache-tomcat-6.0.29 -Dcatalina.home=/user/omfprod/application_server/apache-tomcat-6.0.29 -Djava.io.tmpdir=/user/omfprod/application_server/apache-tomcat-6.0.29/temp org.apache.catalina.startup.Bootstrap start
omfprod 1853 1136 0 11:42 pts/4 00:00:00 /usr/bin/java -Djava.util.logging.config.file=/user/omfprod/application_server/apache-tomcat-6.0.29/conf/logging.properties -Djava.util.logging.manager=org.apache.juli.ClassLoaderLogManager -Djava.endorsed.dirs=/user/omfprod/application_server/apache-tomcat-6.0.29/endorsed -classpath /user/omfprod/application_server/apache-tomcat-6.0.29/bin/bootstrap.jar -Dcatalina.base=/user/omfprod/application_server/apache-tomcat-6.0.29 -Dcatalina.home=/user/omfprod/application_server/apache-tomcat-6.0.29 -Djava.io.tmpdir=/user/omfprod/application_server/apache-tomcat-6.0.29/temp org.apache.catalina.startup.Bootstrap start
omfprod 1855 1136 0 11:42 pts/4 00:00:00 /usr/bin/java -Djava.util.logging.config.file=/user/omfprod/application_server/apache-tomcat-6.0.29/conf/logging.properties -Djava.util.logging.manager=org.apache.juli.ClassLoaderLogManager -Djava.endorsed.dirs=/user/omfprod/application_server/apache-tomcat-6.0.29/endorsed -classpath /user/omfprod/application_server/apache-tomcat-6.0.29/bin/bootstrap.jar -Dcatalina.base=/user/omfprod/application_server/apache-tomcat-6.0.29 -Dcatalina.home=/user/omfprod/application_server/apache-tomcat-6.0.29 -Djava.io.tmpdir=/user/omfprod/application_server/apache-tomcat-6.0.29/temp org.apache.catalina.startup.Bootstrap start
omfprod 1856 1136 0 11:42 pts/4 00:00:00 /usr/bin/java -Djava.util.logging.config.file=/user/omfprod/application_server/apache-tomcat-6.0.29/conf/logging.properties -Djava.util.logging.manager=org.apache.juli.ClassLoaderLogManager -Djava.endorsed.dirs=/user/omfprod/application_server/apache-tomcat-6.0.29/endorsed -classpath /user/omfprod/application_server/apache-tomcat-6.0.29/bin/bootstrap.jar -Dcatalina.base=/user/omfprod/application_server/apache-tomcat-6.0.29 -Dcatalina.home=/user/omfprod/application_server/apache-tomcat-6.0.29 -Djava.io.tmpdir=/user/omfprod/application_server/apache-tomcat-6.0.29/temp org.apache.catalina.startup.Bootstrap start
omfprod 8186 1080 0 11:42 pts/4 00:00:00 grep apache
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Now if i check my web service. it is running fine.
I am not able to reason out why tomcat shuts down after some while.

please guide.
---
Vaibhav

[Tim Holloway]

If Tomcat is shutting down, it's because one of the apps that it's serving is crashing it.

From the looks of your process status, though, it appears that you need to be more subtle. Only one Tomcat can run on a given set of TCP/IP ports at a time. All other copies will start but be useless waste of resources. So before blindly re-launching Tomcat, you need to check to see if there's one already running.