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classpath issue with c3p0 (Tomcat forum at Coderanch)
Invocation of init met hod failed; nested exception is java. As a guide, consider how many distinct PreparedStatements are used frequently shitable your application, and multiply that number by maxPoolSize to arrive at an appropriate value.
Any Statements including Prepared and CallableStatements and ResultSets returned by raw operations will be c3p0-managed, and will be properly cleaned-up on close of the parent proxy Connection.
Regardless of how you create your DataSource, c3p0 will use defaults for any configuration parameters that you do not specify programmatically. You may update this property to any name you find convenient. When configuring Connection testing, first try to minimize the cost of each test. Setting this to library can resolve these issues.
If tasks are hanging forever, try to figure out why, and maybe setting maxAdministrativeTaskTime can help in the meantime. Determines how many connections at a time c3ppo will try to acquire when the pool is exhausted.
Properties files called c3p0. C3P0 offers a wide variety of options for controlling how quickly pools that have grown large under load revert to minPoolSizeand whether "old" Connections in the pool should be proactively replaced to maintain their reliablity.
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However, if Connections are tested on check-in, or custom work is performed, setting forceSynchronousCheckins will cause clients to experience delays associated with that work when they call Connection.
This page location is: F3po default, c3p0 rolls back unresolved transactional work when a user calls close. That can be helpful, but it is also slow. Within the range between minPoolSize and maxPoolSizethe number of Connections in a pool varies according to usage patterns.
The point of Connection pooling is to bear the cost of acquiring a Connection only once, and then to reuse the Connection many, many times. This software is made available for use, modification, and redistribution, under the terms of the Lesser GNU Public License, v.
Milliseconds, time c3p0 will wait between acquire attempts. Cannot resolve reference to bean 'liferayHibernateSessionFactory' np setting constructor argument; nested except ion is org.
Excluding identity tokens from JMX names is particularly hazardous if you will initialize multiple DataSource from the same named configuration. This can sometimes be a problem, especially in application servers that support hot redeployment of client apps.
c3p0-v - JDBC3 Connection and Statement Pooling - Documentation
Setting this parameter to a positive value should eliminate the issue. There are several ways to modify c3p0 properties: Nearly all configuration should nl done at the level of your preferred logging library.
Connections could n ot be acquired from the underlying database! Timer threads inherit their contextClassLoader from the client Thread that provokes initialization of the pool.
Setting this to true may lead to subtle and bizarre bugs.
Coordinates of this version on the Maven central repository: Testing Connections in checkout is the simplest and most reliable form of Connection testing, but for better performance, consider verifying connections periodically using idleConnectionTestPeriod. This parameter determines the period. If you want to merge programmatic changes with preconfigured overrides, you'll have to use getUserOverridesAsString and modify the original settings before replacing.
Applications that use ComboPooledDataSourceor that wrap any c3p0-implemented unpooled DataSource can use the simple user property. Connection pooling permits beans to only "own" a Connection while they are using it. Cannot resolve reference to bean 'tran sactionAdvice' while setting bean property 'nextMethodInterceptor'; nested exception is org. This is primarily useful when applications are pooling Connections from a non-c3p0 unpooled DataSource.
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