c3p0 pool « Development « JPA Q&A





1. C3P0 Creating too many Threads and Timers    stackoverflow.com

I have a Java webapp running on Tomcat, with Hibernate and C3P0. All entity classes and JPA Controllers were done with Netbeans wizzard. There is a servlet that when called inserts ...

2. c3p0 pool configuration    forum.hibernate.org

Hi all, I'm using Hibernate 2 with struts, tomcat, postgres and a c3p0 connection pool reach thanks to a tomcat datasource. tomcat and postgres are on 2 differents servers. After simulating a loss of connection between tomcat and postgres (by disconnecting a cable network, doing a request and reconnecting it), Hibernate/c3po is not able to find a connection anymore... I have ...

3. c3p0 conn pool does not re-init correctly after shutdown?    forum.hibernate.org

hi folks, searched the forums and did not see this problem addressed. if it has a link would be appreciated. i have a webapp instance, with multiple webapps being deployed and redeployed (it's a development environment). i have an application server-level (not web-app level) object ("manager") which has a reference to a singleton instance of a DAO object which is using ...

4. C3P0 Pool    forum.hibernate.org

Hello All, I want to use c3p0 pool with Hiber8. Is my confiruration file correct? How can I be sure that I'm using c3p0 and not the default pool (nothing is notified in JBoss about the used pool). Code: ...

5. Shared c3p0 pool in managed environment?    forum.hibernate.org

6. c3p0 Pooling Problem    forum.hibernate.org

Need help with Hibernate? Read this first: http://www.hibernate.org/ForumMailingli ... AskForHelp Hibernate version:3.2 Hi, I think there is a problem with c3p0 connection pooling. I tried 140 concurrent operations via Threads which starts at same time. Each thread gets a new Session. Persists some data. Commits the session. Closes the session. Although i set c3p0 max connection to 140 it throws an ...

7. multiple c3p0 pools in one web application    forum.hibernate.org

Hi, we are experiencing a deadlock situation that seem to be closely related with c3p0 on our production tomcats. I have examined the effect by producing a thread dump while the application refused to react to struts actions invloving data-base io. the dump shows a lot of c3p0 Helper threads like this Code: "com.mchange.v2.async.ThreadPoolAsynchronousRunner$PoolThread-#2" daemon prio=1 tid=0x94b638b8 nid=0x5454 in Object.wait() [92930000..9293087c] ...

8. Any non LGPL pool as full featured as C3P0?    forum.hibernate.org

Hello, For all you users out there.. I was pretty settled on C3P0 since it offered resilience to DB restarts (detects failed connections using idle connection testing and also by interpreting exceptions on active connections to see if the exceptions mean connection failure), and prepared statement caching (I understand it registers all statements on all connections, so effectively ensuring that a ...

9. C3P0 pool limit got busted    forum.hibernate.org

The info below was mentioned in the release notes for c3p0-0.9.1-pre10 : Quote: [...] Fixed a bug whereby multiple near-simultaneous Connection requests failed to provoke sufficient pool growth/Connection acquisition. This is a bug reintroduced in c3p0-0.9.1-pre4, and is a duplicate of an early issue, resolved under the old pool size management scheme. c3p0 must (and does) keep track not only of ...





10. c3p0 pool : this is function is not supported    forum.hibernate.org

Hello, I'm having the following exception since I migrated from hibernate 2.1 to 3.1.3. I'm using c3p0 v0.9.0. Hibernate version: 3.1.3 Full stack trace of any exception that occurs: [java] 2006-11-08 23:51:10,622 (org.hibernate.impl.SessionImpl:219) 141022 DEBUG - opened session at timestamp: 4763755604467712 [java] 2006-11-08 23:51:10,622 (org.hibernate.transaction.JDBCTransaction:54) 141022 DEBUG - begin [java] 2006-11-08 23:51:10,622 (org.hibernate.jdbc.ConnectionManager:415) 141022 DEBUG - opening JDBC connection [java] 2006-11-08 ...

11. Which conn pool? c3p0 crashes, puilt-in documented unstable    forum.hibernate.org

I found this output when using Hibernate: 328 [main] INFO org.hibernate.connection.DriverManagerConnectionProvider - Using Hibernate built-in connection pool (not for production use!) I searched Google, but only found this: http://docs.jboss.org/hibernate/stable/ ... ejdbc.html It says: "You should use a third party pool for best performance and stability." I don't care about performance (I would guess the max load of my server is about ...