I am using the JPA(hibernate) for the ORM and c3po for connection pooling. While I am able to do all the CRUD operations it gives me the below error while accessing the the data: Here are the tools: Hibernate 3.2.1, Oracle 10g, ojdbc14, connection pool: c3p0-0.9. And the stack trace: java.sql.SQLException: Unsupported feature ...
hi all, This is an issue which I have seen all across the web. I will bring it up again as till now I don't have a fix for the same. I am using hibernate 3. mysql 5 and latest c3p0 jar. I am getting a broken pipe exception. Following is my hibernate.cfg file. com.mysql.jdbc.Driver ...
Hi, we are running java6/hibernate/c3p0/postgresql stack. Our JDBC Driver is 8.4-701.jdbc3 I have a few questions about Prepared Statements. I have read excellent document about Prepared Statements But i still have a question how to configure c3p0 with postgresql. At the moment we have c3p0.maxStatements = 0 c3p0.maxStatementsPer...
hey all, I'm just getting started with c3p0 for database connection pooling. It's attaching itself to my log4j output currently. How do I set logging off or at least to SEVERE level only for c3p0? I tried tweaking the properties file but not sure it's being picked up properly. any ideas on how best to turn it off? thanks UPDATE: this...
I have a Spring/JPA application with Hibernate as the JPA provider. I've configured a C3P0 data source in Spring via: <bean id="myJdbcDataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource" destroy-method="close"> <!-- Connection properties --> <property name="driverClass" value="$DS{database.class}" /> <property name=...
I have a Spring/JPA/Hibernate application and am trying to get it to pass my Junit integration tests against H2 and MySQL. Currently I am using Atomikos for transactions and C3P0 for connection pooling. Despite my best efforts my DAO integration one of the tests is failing with org.hibernate.NonUniqueObjectException. In the failing ...
Hi I have read so many articles on the Internet about this problem but none seem to have a clear solution. Please could someone give me a definite answer as to why I am getting database timeouts. The app is a GWT app that is being hosted on a Tomcat 5.5 server. I use spring and the session factory is created in the applicationContext.xm...
I would like to set the testConnectionOnCheckin property for c3p0. However I am having trouble doing so because the c3p0 datasource is created on my behalf within a hibernate entity-manager bean. <bean id="entityManagerFactory" class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean"> <property name="persistenceUnitM...
Project on eclipse 3.5, wicket, spring, hibernate, oracle 11 database and Tomcat 6 (Its a sample from book "wicket in action"). In this project I can not connect to database. Can anybody help to fix it? That is log: 25.06.2010 13:58:32 org.apache.catalina.core.AprLifecycleListener init INFO: The APR based Apache Tomcat Native library w...
Hi, I have been having trouble with Hibernate and Mysql timeout error for a week. Apparently, After my Hibernate/MySQL have been running after 8 hours(which is default timeout value in Mysql), I have the exception. I also added c3p0. But it doesn't help. Please advice Thank you so much Here is my Hibernate Configuration: <property ...
I'm working on an application which uses the Spring framework in combination with Ibatis and a C3P0 Connection pool. The system connects to about 12 seperate databases. When one of the databases is unreachable, I get a stacktrace in the logfile which is generated by Spring (see below). However, this logging is missing very vital informa...
Hello, I'm using Hibernate with MySQL and c3p0, and when the MySQL connection expires after 8 hours (wait_timeout), Hibernate is unable to reconnect and i get the following exception: com.mysql.jdbc.CommunicationsException: Communications link failure due to underlying exception: ** BEGIN NESTED EXCEPTION ** java.io.EOFException ST...
Hi i have mysql under my hibernate and i am also using c3p0-0.9.1 for connection pool !. when running in my laptop (i mean localy) i have no errors. but on when i deploy it on the server , i got this exception com.mchange.v2.resourcepool.CannotAcquireResourceException: A ResourcePool could not acquire a resource from its primary factory...
Hello. I'm writing a red5 application using Java and I'm using the c3p0 for the database interaction. It seems that after the connection as timed out in my MySQL server my application stops working with a suggestion to configure autoreconnect=true. how can i do so? this is the function that i use to create datasource: private ComboPo...
Hi. I'm trying to wrap C3P0 under OSGi, but it throws the following error: An attempt by a client to checkout a Connection has timed out Caused by: com.mchange.v2.resourcepool.TimeoutException: A client timed out while waiting to acquire a resource from com.mchange.v2.resourcepool.BasicResourcePool@5d0e2c9 -- timeout at...
I wrap my project in OSGi bundle(just call my first start method from Activator.start()). In my project I use ORM ActiveObjects and c3p0 pool. All of project dependencies (jar librarys) are in class path. If I run my project with c3p0 it is takes about 5 minutes to 1 query to DB. Without c3p0 it is works correctly. In what is a problem? ...
I'm connecting to a MySQL (InnoDB) database over a connection with fairly high latency (~80ms) but relatively high bandwidth. I've noticed that query times vary dramatically depending on how the query is issued. In the following examples I'm performing a query for a single, small row by primary key. The query times are: Command line...
My Java App communicates to MySQL using Hibernate and C3p0 libraries. I am getting following exception almost every day. com.mysql.jdbc.exceptions.jdbc4.CommunicationsException MESSAGE: Communications link failure The last packet successfully received from the server was 32,088,839 milliseconds ago. The last packet sent successfully ...
I'm using C3P0 as a connection pool in Tomcat, and I'm seeing very worrying errors: 2010-09-16 13:25:00,160 [Timer-0] WARN com.mchange.v2.async.ThreadPoolAsynchronousRunner - com.mchange.v2.async.ThreadPoolAsynchronousRunner$DeadlockDetector@43502400 -- APPARENT DEADLOCK!!! Creating emergency threads for unassigned pending tasks! 2010...
I'm using GWT with Hibernate, c3p0 and MySQL to produce a web app with a limited audience (max 50 users per day). During testing I found that Hibernate was opening a connection with each session but not closing it, irrespective of use of the close() method. My current configuration is as follows: hibernate.connection.driver_class=com.m...