I have recently upgraded an application from java 1.7 to 1.8. Rest of the libraries versions remains unchanged. I am getting the following error after the upgrade:
DEBUG 2015-11-12 09:55:12 BasicResourcePool An exception occurred while acquiring a poolable resource. Will retry.
java.lang.NullPointerException
at oracle.net.jndi.JndiAttrs.getAttrs(JndiAttrs.java:207)
at oracle.net.resolver.AddrResolution.<init>(AddrResolution.java:198)
at oracle.net.ns.NSProtocol.connect(NSProtocol.java:219)
at oracle.jdbc.driver.T4CConnection.connect(T4CConnection.java:1102)
at oracle.jdbc.driver.T4CConnection.logon(T4CConnection.java:320)
at oracle.jdbc.driver.PhysicalConnection.<init>(PhysicalConnection.java:546)
at oracle.jdbc.driver.T4CConnection.<init>(T4CConnection.java:236)
at oracle.jdbc.driver.T4CDriverExtension.getConnection(T4CDriverExtension.java:32)
at oracle.jdbc.driver.OracleDriver.connect(OracleDriver.java:521)
at com.mchange.v2.c3p0.DriverManagerDataSource.getConnection(DriverManagerDataSource.java:134)
at com.mchange.v2.c3p0.WrapperConnectionPoolDataSource.getPooledConnection(WrapperConnectionPoolDataSource.java:182)
at com.mchange.v2.c3p0.WrapperConnectionPoolDataSource.getPooledConnection(WrapperConnectionPoolDataSource.java:171)
at com.mchange.v2.c3p0.impl.C3P0PooledConnectionPool$1PooledConnectionResourcePoolManager.acquireResource(C3P0PooledConnectionPool.java:137)
at com.mchange.v2.resourcepool.BasicResourcePool.doAcquire(BasicResourcePool.java:1014)
at com.mchange.v2.resourcepool.BasicResourcePool.access$800(BasicResourcePool.java:32)
at com.mchange.v2.resourcepool.BasicResourcePool$AcquireTask.run(BasicResourcePool.java:1810)
at com.mchange.v2.async.ThreadPoolAsynchronousRunner$PoolThread.run(ThreadPoolAsynchronousRunner.java:547)
Hibernate configurations:
<hibernate-configuration>
<session-factory>
<property name="hibernate.connection.driver_class">oracle.jdbc.driver.OracleDriver</property>
<property name="hibernate.connection.url">jdbc:oracle:thin:@ldaps://XXXX,cn=OOOO,dc=WWW</property>
<property name="hibernate.connection.username">YYYY</property>
<property name="hibernate.statement_cache.size">0</property>
<property name="hibernate.connection.password">ZZZZZ</property>
<property name="hibernate.c3p0.min_size">5</property>
<property name="hibernate.c3p0.max_size">20</property>
<property name="hibernate.c3p0.timeout">1800</property>
<property name="hibernate.c3p0.max_statements">0</property>
<property name="hibernate.default_schema">YYYY</property>
<property name="hibernate.dialect">org.hibernate.dialect.OracleDialect</property>
<property name="hibernate.show_sql">true</property>
</session-factory>
</hibernate-configuration>
Related Libraries used:
- ojdbc6 11.2.0.3.0
- hibernate 3.1
Problem:
The dependencies contained 2 hibernate version 3.1 and 3.0 and ojdbc6 and ojdbc7. (used mvn dependency:tree -Dverbose to got dependency tree)
Solution: Excluded the other versions of hibernate and ojdbc from the dependencies.
<dependency>
<groupId>****</groupId>
<artifactId>****</artifactId>
<version>****</version>
<exclusions>
<exclusion>
<groupId>hibernate</groupId>
<artifactId>hibernate</artifactId>
</exclusion>
<exclusion>
<groupId>com.oracle</groupId>
<artifactId>ojdbc6</artifactId>
</exclusion>
</exclusions>
</dependency>
