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Posted to issues@commons.apache.org by "Davide Caroselli (JIRA)" <ji...@apache.org> on 2014/04/03 12:11:18 UTC
[jira] [Created] (DBCP-412) dbcp2.PoolableConnection.close raises
NullPointerException
Davide Caroselli created DBCP-412:
-------------------------------------
Summary: dbcp2.PoolableConnection.close raises NullPointerException
Key: DBCP-412
URL: https://issues.apache.org/jira/browse/DBCP-412
Project: Commons Dbcp
Issue Type: Bug
Affects Versions: 2.0
Environment: Mac OSX, Java 7, SQLAzure
Reporter: Davide Caroselli
Priority: Critical
I found a critical error while closing a PoolableConnection.
Here's the code to reproduce the bug (largely copied from the example shown in the Apache DBCP site):
{code:title=PoolingDataSourceExample2.java|borderStyle=solid}
public static void main(String[] args) throws Throwable {
Class.forName("com.microsoft.sqlserver.jdbc.SQLServerDriver");
DataSource dataSource = setupDataSource(jdbcUrl);
Connection connection = null;
PreparedStatement statement = null;
ResultSet result = null;
try {
connection = dataSource.getConnection();
statement = connection.prepareStatement("SELECT 1");
result = statement.executeQuery();
} finally {
result.close();
statement.close();
connection.close();
}
}
public static DataSource setupDataSource(String connectURI) {
ConnectionFactory connectionFactory = new DriverManagerConnectionFactory(connectURI, null);
PoolableConnectionFactory poolableConnectionFactory = new PoolableConnectionFactory(connectionFactory, null);
ObjectPool<PoolableConnection> connectionPool = new GenericObjectPool<>(poolableConnectionFactory);
PoolingDataSource<PoolableConnection> dataSource = new PoolingDataSource<>(connectionPool);
return dataSource;
}
{code}
When the code tries to close the connection (in the final block), an exception is raised:
{code:title=PoolingDataSourceExample2.java|borderStyle=solid}
Exception in thread "main" java.lang.NullPointerException
at org.apache.commons.dbcp2.PoolableConnection.close(PoolableConnection.java:151)
at org.apache.commons.dbcp2.DelegatingConnection.closeInternal(DelegatingConnection.java:235)
at org.apache.commons.dbcp2.DelegatingConnection.close(DelegatingConnection.java:218)
at org.apache.commons.dbcp2.PoolingDataSource$PoolGuardConnectionWrapper.close(PoolingDataSource.java:212)
at dbcp.PoolingDataSourceExample2.closeQuietly(PoolingDataSourceExample2.java:64)
at dbcp.PoolingDataSourceExample2.main(PoolingDataSourceExample2.java:43){code}
As I can see, the problem is the "_pool" variable inside PoolableConnection but I could not find any solution.
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