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Cannot Retrieve A C3p0 Datasource


I hope this helps! Some applications hold Connections open for a long time (although that's bad practice, if you are using a Connection pool). c3p0 enforces configuration constraints continually, and ignores this parameter. This may not be the most recent version of c3p0. his comment is here

For example, the following configuration infomration... Otherwise, create a simple application from the Getting Started with Clojure on Heroku article before proceeding. Comment Cancel Post aadi Junior Member Join Date: Jul 2008 Posts: 27 #3 Jul 31st, 2008, 04:48 AM I use the actual URL there, i could not present it here because Some DataSource implementations do not offer these properties. http://www.mchange.com/projects/c3p0/

Hibernate C3p0

See the api docs for more information. smiles, Steve Re: [c3p0-users] LifeCycle of a connection in c3p0 From: sakin cali - 2012-07-02 14:19:01 Attachments: Message as HTML Hi Steve, c3p0 automatically tests Connections following Exceptions, and if If you wish c3p0 to leave transaction management to you, and neither commit nor rollback (nor modify the state of Connection autoCommit), you may set forceIgnoreUnresolvedTransactions to true. Quickstart Basic configuration Advanced configuration c3p0-play-specific configuration parameters Alternatives and inspirations Contact and copyright Appendix: Mapping Play-native / Bone CP config parameters to c3p0 Quickstart Configure your DataSources in the ordinary

Usually this is not at all a problem. Am I > supposed to add some settings to my ComboPooledDataSource? > > Any help would be greatly appreciated. Get connection conn = cpds.getConnection() Re: [c3p0-users] a lot of threads waiting for a GlobalMaxOnlyStatementCache From: Steve Waldman - 2012-06-28 13:16:42 Alexander, It sounds like you are giving the Statement C3p0 Star Wars Please turn JavaScript back on and reload this page.All Places > CA API Management Community > DiscussionsLog in to create and rate content, and to follow, bookmark, and share content with

Reload to refresh your session. If database restarts will be rare so quick recovery is not an issue, consider reducing the frequency of tests by idleConnectionTestPeriod to, say, 300, and see whether clients are troubled by Whether and how much statement pooling will help depends on how much parsing, planning, and optimizing of queries your databases does when the statements are prepared. https://communities.ca.com/thread/241755534 share|improve this answer edited May 1 '13 at 11:55 answered May 1 '13 at 11:09 Steve Waldman 7,63711526 can you provide example on how to do this?

Advanced configuration Play permits, and c3p0 supports, the definition and configuration of multiple DataSources by name: dbplugin=disabled c3p0.play.enabled=true db.default.driver=org.h2.Driver db.default.url="jdbc:h2:mem:play" db.default.user=sa db.default.password=secret db.awesome.driver=org.postgresql.Driver db.awesome.url="jdbc:postgresql://localhost/awesomedb" db.awesome.user=superlative db.awesome.password=hushhush c3p0.minPoolSize=2 c3p0.maxPoolSize=10 Very often, you C3p0 Github Re: [c3p0-users] c3p0 returns dead connections although testConnectionOnCheckout is enabled From: Thilo-Alexander Ginkel - 2012-07-04 17:37:40 On Tue, Jul 3, 2012 at 11:38 PM, Steve Waldman wrote: > basically, The name will be the value of the property dataSourceName, which you can set yourself to ensure that semanically equivalent data sources are identifiable across application restarts. a test) by the pool itself.

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Here is the AbstractModel class which is still being worked on: public abstract class AbstractModel { > > protected Connection myConnection; > protected Statement stmt; > protected CallableStatement cstmt; > protected Discover More See the API docs for ConnectionCustomizer. Hibernate C3p0 I am using Hibernate 4 with C3p0 connection pool. C3p0 Connection Pool Example Within the range between minPoolSize and maxPoolSize, the number of Connections in a pool varies according to usage patterns.

This tool uses JavaScript and much of it will not work correctly without it enabled. http://sauvblog.com/cannot-retrieve/cannot-retrieve-document-specification.html My application has a lot of users and db load is very high, so I guess I need to adjust some settings in hibernate, but I can't figure out which ones. DataSources are written in the JavaBean style, offering all the required and most of the optional properties (as well as some non-standard ones), and no-arg constructors. Briefly describe the problem (required): Upload screenshot of ad (required): Select a file, or drag & drop file here. ✔ ✘ Please provide the ad click URL, if possible: Home Browse C3p0 Maven

I even have a sequenced ID (auto increment) which is incremented, yet the data isn't inserted. acquireIncrement (a configuration parameter shared by c3p0 and BoneCP) is configured twice, once in Play-typical format and once in c3p0-native format. Deinum, you last suggestion did the trick with this in web.xml Code: jdbc/webmeet javax.sql.DataSource Container and this in server.xml Code: weblink How do fonts work in LaTeX?

You're app will now use c3p0. C3p0 Actor Setting preferredTestQuery will lead to errors as Connection tests fail if the query target table does not exist in your database prior to initialization of your DataSource. Get connection conn = cpds.getConnection() 3.

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Try http://code.google.com/p/myschedule 06/20/2011 12:46:09 Subject: Failed to obtain DB connection for SQL server nilishah journeyman Joined: 06/01/2011 13:47:43 Messages: 31 Offline I have tried that as well. Shouldn't it be something like this? Managing Connection Lifecycles with Connection Customizer Application frequently wish to set up Connections in some standard, reusable way immediately after Connection acquisitions. C3p0 Silver Leg What improvements can I make?

Last edited by Marten Deinum; Jul 31st, 2008, 05:55 AM. Using the name you provide, c3p0 will create an empty table, and make a simple query against it to test the database. Both seem to work (commented out and not commented closeConnection() methods) but both still raise the connection error when setMinPoolSize(), setAcquireIncrement() and setMaxPoolSize() are defined. check over here Get connection > > conn = cpds.getConnection() > > 3.

By default, c3p0 will use that method if it is present. When a connection is required, an existing one is retrieved from the pool. User configuration is stored as a Map containing String keys and values, stored under the following configuration parameter: extensions The extensions Map can be set programatically like any other configuration parameter. All standard c3p0 configuration is supported.

It defines an initSql extension, whose value should be a String containing SQL that should be executed when a Connection is checked out from the pool: package mypkg; import java.sql.*; import If you set c3p0.testConnectionOnCheckin to true, then after con.close() is called but before the recycled Connection is made available to other clients, the Connection will be tested (and destroyed if it This is a JavaBean-style class with a public, no-arg constructor, but before you use the DataSource, you'll have to be sure to set at least the property jdbcUrl. So you also need to include it in your web.xml.

Configuring the pool The number of idle connections to keep warm in your pool depends on the size and nature of your application. at com.mchange.v2.resourcepool.BasicResourcePool.awaitAvailable(BasicResourcePool.java:1319) at com.mchange.v2.resourcepool.BasicResourcePool.prelimCheckoutResource(BasicResourcePool.java:557) at com.mchange.v2.resourcepool.BasicResourcePool.checkoutResource(BasicResourcePool.java:477) at com.mchange.v2.c3p0.impl.C3P0PooledConnectionPool.checkoutPooledConnection(C3P0PooledConnectionPool.java:525) ... 13 more Please help me. 06/21/2011 14:08:50 Subject: Re:Failed to obtain DB connection for SQL server ericm jedi Joined: 01/27/2011 17:23:34 does it recover from database restarts well enough?), and then decide. Here is the more detailed information, I keep the definitions of dataSource, SessionFacotry, TransactionManager in the applicationContext, Code:

It is translated from Play format and used as-is, since there is no c3p0-native value to override it. Set this to true so that c3p0's Threads use the the c3p0 library's AccessControlContext, rather than an AccessControlContext that may be associated with the client application and prevent its garbage collection. The simplest way to speed up Connection testing under a JDBC 3 driver (or a pre-0.9.5 version of c3p0) is to define a test query with the preferredTestQuery parameter.