On 14/05/2010 22:44, Licht Jiang wrote: > I run a servlet on tomcat 5.5.27, jvm 1.6.0_10-b33, and fedora > 2.6.21.7-2.fc8xen. The service has a problem: after running for a > certain time, the servlet becomes unavailable because of "too many > open files" exception: > > 2010-05-13 23:58:14,575 DEBUG - Reload config... > 2010-05-13 23:58:14,575 ERROR - java.io.FileNotFoundException: > /root/Applications/tomcat-dev/webapps/MyServices/WEB-INF/classes/conf/MyConf.properties > (Too many open files) > > To find out actually what files were opened too many times, I listed > all of them and some of them are shown below:
Shutdown Tomcat & check it has definitely stopped running. Please provide a complete directory listing for: /root/Applications/tomcat-dev/conf/Catalina/localhost /root/Applications/tomcat-dev/webapps Please provide the contents of your server.xml, with all comments & any passwords removed. Please post the code you are using in your servlet, to open & read MyConf.properties. p > ... > java 11515 root 282r REG 8,1 197 182030 > /root/Applications/tomcat-dev/conf/Catalina/localhost/._manager.xml > java 11515 root 283r REG 8,1 197 182028 > /root/Applications/tomcat-dev/conf/Catalina/localhost/._host-manager.xml > java 11515 root 284r REG 8,1 197 182032 > /root/Applications/tomcat-dev/conf/Catalina/localhost/._Push.xml > java 11515 root 285r REG 8,1 197 182030 > /root/Applications/tomcat-dev/conf/Catalina/localhost/._manager.xml > java 11515 root 286r REG 8,1 197 182028 > /root/Applications/tomcat-dev/conf/Catalina/localhost/._host-manager.xml > java 11515 root 287r REG 8,1 197 182032 > /root/Applications/tomcat-dev/conf/Catalina/localhost/._Push.xml > java 11515 root 288r REG 8,1 197 182028 > /root/Applications/tomcat-dev/conf/Catalina/localhost/._host-manager.xml > java 11515 root 289r REG 8,1 197 182032 > /root/Applications/tomcat-dev/conf/Catalina/localhost/._Push.xml > java 11515 root 290r REG 8,1 197 182030 > /root/Applications/tomcat-dev/conf/Catalina/localhost/._manager.xml > java 11515 root 291r REG 8,1 197 182028 > /root/Applications/tomcat-dev/conf/Catalina/localhost/._host-manager.xml > java 11515 root 292r REG 8,1 197 182032 > /root/Applications/tomcat-dev/conf/Catalina/localhost/._Push.xml > ... > > where "java 11515" is tomcat. "MyConf.properties" does not appear on > the above list. So, it is obvious the problem is due to those 3 xml > files. Seems that tomcat keeps opening these 3 xml files until the > limit is reached. > > So, my question is why tomcat keeps opening them and what is the > trigger of the operation? For your reference, these 3 files are > listed: > > _________Push.xml_______ > > <!-- The contents of this file will be loaded for each web application --> > <Context> > > <!-- Default set of monitored resources --> > <WatchedResource>WEB-INF/web.xml</WatchedResource> > > <!-- Uncomment this to disable session persistence across Tomcat > restarts --> > <Manager pathname="" /> > > <Resource name="jdbc/CEDB" auth="Container" type="javax.sql.DataSource" > maxActive="20" maxIdle="30" maxWait="10000" > username="username" password="secret" > driverClassName="com.mysql.jdbc.Driver" > url="jdbc:mysql://hostname:1234/ABCD?autoReconnect=true" > validationQuery="select count(*) from Partner;" > testOnReturn="true" testWhileIdle="true" > removeAbandoned="true" logAbandoned="true" /> > > </Context> > > _________manager.xml_______ > > <?xml version="1.0" encoding="UTF-8"?> > <!-- > Licensed to the Apache Software Foundation (ASF) under one or more > contributor license agreements. See the NOTICE file distributed with > this work for additional information regarding copyright ownership. > The ASF licenses this file to You under the Apache License, Version 2.0 > (the "License"); you may not use this file except in compliance with > the License. You may obtain a copy of the License at > > http://www.apache.org/licenses/LICENSE-2.0 > > Unless required by applicable law or agreed to in writing, software > distributed under the License is distributed on an "AS IS" BASIS, > WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. > See the License for the specific language governing permissions and > limitations under the License. > --> > <!-- > > Context configuration file for the Tomcat Manager Web App > > $Id: manager.xml 565211 2007-08-13 00:09:38Z markt $ > > --> > > > <Context docBase="${catalina.home}/server/webapps/manager" > privileged="true" antiResourceLocking="false" antiJARLocking="false"> > > <!-- Link to the user database we will get roles from --> > <ResourceLink name="users" global="UserDatabase" > type="org.apache.catalina.UserDatabase"/> > > </Context> > > _________host-manager.xml_______ > > <?xml version="1.0" encoding="UTF-8"?> > <!-- > Licensed to the Apache Software Foundation (ASF) under one or more > contributor license agreements. See the NOTICE file distributed with > this work for additional information regarding copyright ownership. > The ASF licenses this file to You under the Apache License, Version 2.0 > (the "License"); you may not use this file except in compliance with > the License. You may obtain a copy of the License at > > http://www.apache.org/licenses/LICENSE-2.0 > > Unless required by applicable law or agreed to in writing, software > distributed under the License is distributed on an "AS IS" BASIS, > WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. > See the License for the specific language governing permissions and > limitations under the License. > --> > <!-- > > Context configuration file for the Tomcat Host Manager Web App > > $Id: host-manager.xml 565211 2007-08-13 00:09:38Z markt $ > > --> > > > <Context docBase="${catalina.home}/server/webapps/host-manager" > privileged="true" antiResourceLocking="false" antiJARLocking="false"> > > </Context> > > Any thoughts? > > Thanks! > -Michael > > --------------------------------------------------------------------- > To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org > For additional commands, e-mail: users-h...@tomcat.apache.org >
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