apache-commons-dbcp

I am running a web application in Production that recently crashed after it was under some stress. I would guess 100-300 people were accessing the site at similar times, which I would expect to work fine. The logs around the time of the crash are: org.codehaus.groovy.grails.web.taglib.exceptions.GrailsTagException: Error executing tag <g:render>: Hibernate operation: could not inspect JDBC autocommit mode; uncategorize\ d SQLException for SQL [???]; SQL state [null]; error code [0]; Cannot get a connection, pool error Timeout waiting for idle object; nested exception is org.apache.commons.db\

I am trying to insert Arabic letter in to mysql database, but it only store "????". I am using DBCP for connecting with mysql databse, here is the datasource: <Resource name="jdbc/view_db" auth="Container" type="javax.sql.DataSource" username="root" password="" autoReconnect="true" testOnBorrow="true" validationQuery = "SELECT 1" driverClassName="com.mysql.jdbc.Driver" url="jdbc:mysql://localhost/view_db" maxActive="50" maxIdle="10"/> how to setup UTF-8 encoding with in DBCP configuration or how to use (useUnicode=yes characterEncoding=UTF-8 ) ? According to the DBCP documentation you need use

Does anybody have experience with using Oracle UCP under real production load? Does it handle database reconnects well? Are there any multi-threading issues? Has anybody compared it with C3P0 or Apache DBCP? MRalwasser I evaluated UCP 11.2.0.1 as a replacement for our legacy connection pool and I cannot recommend it : it does not fully support jdk 6 / ojdbc6.jar. For example the use of statement caching and jmx-support does not work with java 6 and throws exceptions. no internal statement cache - it relies on the jdbc driver's statement cache ( setPoolable() ) I submitted both issues to oracle

It seems there is a lot of confusion between these two connection pooling libraries. What I want to know is which one is better (if at all)? Here are some points which I would like to put up... Could someone please verify? Tomcat DBCP: uses the default tomcat-dbcp.jar which will be present in your tomcat/lib directory. You do not need commons-dbcp.jar or commons-pool.jar libraries in your web-inf/lib. The DB driver should be placed in tomcat/lib. Tomcat DBCP datasource class is org.apache.tomcat.dbcp.dbcp.BasicDataSource . Commons DBCP datasource class is org.apache.commons.dbcp

I have a basic Spring JDBC application with a pretty basic configuration: <bean id="myDataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource"> <property name="driverClassName" value="oracle.jdbc.OracleDriver"/> <property name="url" value="jdbc:oracle:thin:@1.1.1.1:1521:XXX"/> <property name="username" value="username"/> <property name="password" value="password"/> </bean> <bean id="dbThing" class="com.DbThing"> <property name="dataSource" ref="myDataSource"/> </bean> I would like to introduce a connection pool, and after reading several threads on SO I am a bit confused