Is Java.sql.Connection Thread-Safe?

Java.sql.Connection objects are not inherently thread-safe, meaning that multiple threads cannot access the same Connection object without a mechanism of synchronization. This means that when using a Connection object across multiple threads, each thread should be provided with its own Connection instance to prevent any potential issues.

It is important to note that even if two threads are running in different processes and are thus using separate JVMs, it is still possible for access to shared resources to cause issues. To address this problem, developers need to ensure that their code takes steps to properly synchronize access to the Connection object, or any other shared resources.

For applications with multiple threads, the best approach is to use an object pool to manage the Connections, ensuring that each thread is provided with its own dedicated Connection. This makes sure that only one thread can access the Connection at a time, preventing any potential conflicts or errors.