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https://issues.apache.org/jira/browse/DBCP-412?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Phil Steitz updated DBCP-412:
-----------------------------
Fix Version/s: 2.1
> 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: Minor
> Labels: NullPointerException, PoolableConnection
> Fix For: 2.1
>
> Attachments: DBCP-412.patch
>
>
> 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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