[POOL-292] ClassNotFoundException: org.apache.commons.pool2.impl.DefaultEvictionPolicy

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Pending Closed
• Affects Version/s: 2.3
• Fix Version/s: 2.4.1
• Labels: OSGi, classnotfoundexception

Environment

Apache Karaf OSGi

• Assignee: Unassigned
• Reporter: Narayanan Harihara
• Created: 23/Apr/15 14:33
• Updated: 01/Jun/15 19:57
• Resolved: 14/May/15 09:00

Description

Here is my application structure:
myapplication-bundle(uses mybatis) --> datasource-bundle (uses commons-dbcp2) --> commons-pool2 bundle.

With this structure, all the datasource API information are hidden from my application and only javax.sql.DataSource is exported from the datasource-bundle. So I do not have OSGi import package for org.apache.commons.pool2.impl in my application.

But on version 2.3 of commons-pool2, the method org.apache.commons.pool2.impl.BaseGenericObjectPool.setEvictionPolicyClassName is using Thread.currentThread().getContextClassLoader() to load EvicationPolicy class, which means it is using the class loader of myapplication to load org.apache.commons.pool2.impl.DefaultEvictionPolicy class. Since I do not have that in myapplication-bundle's OSGi Import-Package, I get a ClassNotFound exception.

This issue did not happen in commons-pool2 version 2.2 because, it did not use the current thread's class loader to instantiate the eviction policy. Due to this, I am kinda forced to use 2.2 version in my environment and i would like to stay on the latest version due to all the bug fixes with concurrency.

Any help would be really appreciated.

Issue Links

• duplicates: POOL-289 Wrong ClassLoader used in BaseGenericObjectPool