Null connectionpool

Check that the connection isn't null before you attempt to close it. Elliott Frisch Elliott Frisch k 19 19 gold badges silver badges bronze badges. But won't that just compound the problem? In my case I get Cannot invoke "java. RamonZarate The exception is coming from the close call. This will fix that. Won't fix any bugs you haven't mentioned in getConnection ; but it is odd that getConnection doesn't invoke pool. Well, that is because I have invoked it someplace else; in the StudentDB.

The Overflow Blog. Podcast Helping communities build their own LTE networks. Podcast Making Agile work for data science. Whether connection pooling is used does not affect application code. It does not require any code changes to the application because the application performs a lookup on a JNDI name of a previously registered data source. If the data source specifies a connection pooling implementation during JNDI registration as described in section " Creating a Data Source Using the DataDirect Connection Pool Manager " , the client application benefits from faster connections through connection pooling.

The following example shows code that can be used to look up and use a JNDI-registered data source for connections. For example:. To ensure that the connection pool is closed correctly when an application stops running, the application must notify the DataDirect Connection Pool Manager when it stops. If an application runs on JRE 1.

The PooledConnectionDataSource. For example, if changes are made to the pool configuration using a pool management tool, the PooledConnectionDataSource. We closed the connection at , , , and iterations. The total elapsed time for each run was measured when connection pooling was used and was measured again when connection pooling was not used as shown in the following table:.

When connection pooling was used, the first connection took the longest time because a new physical connection had to be created and the pool manager had to be initialized. Once the connection existed, the physical connection was placed in the pool and was reused to create a handle for each subsequent connection.

You can see this by comparing the first connection the first iterations with its subsequent connections. NOTE: In our connection pooling example, all subsequent connections were reused because they were used for the same user and pool cleanup had not occurred. Now, compare the pooling results at each iteration checkpoint to the non-pooling results. Clearly, connection pooling represents a significant improvement in performance.

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New post summary designs on greatest hits now, everywhere else eventually. Related Viewed 6k times. When we load the system with 40 simultaneous users we get this error org.

ConnectionPoolTimeoutException: Timeout waiting for connection from pool at org. Stephen Inzer Stephen Inzer 31 1 1 silver badge 2 2 bronze badges. If setting -dzuul. Add a comment. Active Oldest Votes. Anirudh Sharma 7, 13 13 gold badges 37 37 silver badges 41 41 bronze badges. Chen Linlin Chen Linlin 21 3 3 bronze badges. If you still looking for solution, i took the following approach.