Fixing 'Network Adapter' connection issue in Java Oracle DB

If you are encountering a "Network Adapter" connection issue when trying to connect to an Oracle database using Java, there are a few steps you can take to resolve the problem.

First, ensure that the Oracle database is up and running. This may seem obvious, but it's always a good idea to double-check.

Next, check your connection string to make sure it is formatted correctly. The connection string should include the hostname or IP address of the database server, the port number, and the database name. Make sure that all of these elements are correct and that there are no typos.

If the connection string is correct, try adding the following line of code to your Java program:

System.setProperty("oracle.net.disableOob", "true");

This will disable out-of-band (OOB) messages, which can sometimes cause the "Network Adapter" issue.

If none of these steps resolve the problem, it's possible that there is a firewall or network issue preventing the Java program from connecting to the database. In this case, you may need to consult with your IT department or network administrator to troubleshoot the issue further.

In summary, to fix the "Network Adapter" connection issue in Java Oracle DB, ensure that the database is up and running, check your connection string for errors, disable OOB messages, and troubleshoot any potential network issues.

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