Oracle tomcat driver

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Email Required, but never shown. The Overflow Blog. Podcast Helping communities build their own LTE networks. Podcast Making Agile work for data science. After a bit of debugging, It seems that tomcat's JreMemoryLeakPreventionListener initializes the DriverManager from the "system" classloader and not the "common" classloader from tomcat's code :.

Since ojbc7. With this, the driver is registered using the service provider mechanism from the JreMemoryLeakPreventionListener invocation using the system classloader. It's a bit complex but the DriverManager itself may cause and additional registration of the driver from the webapp's classloaders when it calls Class. Stack Overflow for Teams — Collaborate and share knowledge with a private group. Create a free Team What is Teams? Collectives on Stack Overflow.

Learn more. How to register oracle jdbc driver on Tomcat 7. Ask Question. Asked 8 years, 1 month ago. Active 6 years, 10 months ago. Viewed 18k times. Add a comment. Active Oldest Votes. Insert this statement in the server. Oracle Database - Enterprise Edition - Version However, feedback from tomcat-user hasshown that specifics for individual configurations can be rather tricky. Here then are some example configurations that have been posted totomcat-user for popular databases and some general tips for db usage.

Please let usknow if you have any other tested configurations that you feel may be of useto the wider audience, or if you feel we can improve this section in anyway. You will most likely need to modify olderJNDI resource configurations to match the syntax in the example below in orderto make them work in Tomcat 8. See Tomcat Migration Guidefor details. Also, please note that JNDI DataSource configuration in general, and thistutorial in particular, assumes that you have read and understood theContext andHost configuration references, includingthe section about Automatic Application Deployment in the latter reference.

DriverManager supports theserviceprovider mechanism. Driver file are automatically discovered, loaded and registered,relieving you from the need to load the database driver explicitly beforeyou create a JDBC connection. However, the implementation is fundamentally broken in all Java versions fora servlet container environment. The problem is that java. DriverManager will scan for the drivers only once. This is enabled by default. It means that onlylibraries visible to the common class loader and its parents will be scanned fordatabase drivers.

If you are consideringdisabling this feature, note that the scan would be triggered by the first webapplication that is using JDBC, leading to failures when this web application isreloaded and for other web applications that rely on this feature. The list of drivers in java. DriverManager is alsoa known source of memory leaks. Any Drivers registeredby a web application must be deregistered when the web application stops.

Tomcat will attempt to automatically discover and deregister anyJDBC drivers loaded by the web application class loader when the webapplication stops.

However, it is expected that applications do this for themselves viaa ServletContextListener. The default database connection pool implementation in Apache Tomcatrelies on the libraries from theApache Commons project. The following libraries are used:.

However,only the classes needed for connection pooling have been included, and thepackages have been renamed to avoid interfering with applications. A database connection pool creates and manages a pool of connectionsto a database. Recycling and reusing already existing connectionsto a database is more efficient than opening a new connection. There is one problem with connection pooling. A web application hasto explicitly close ResultSet's, Statement's, and Connection's.

Failure of a web application to close these resources can result inthem never being available again for reuse, a database connection pool 'leak'. This can eventually result in your web application database connections failingif there are no more available connections.

There is a solution to this problem. Notonly can it recover them, but also generate a stack trace for the codewhich opened these resources and never closed them. The default for both of these attributes is false. Note that removeAbandonedOnMaintenance has no effect unless poolmaintenance is enabled by setting timeBetweenEvictionRunsMillis to a positive value.

See theDBCP 2 documentation for full documentation on these attributes. Use the removeAbandonedTimeout attribute to set the numberof seconds a database connection has been idle before it is considered abandoned.