What to do if oracle nodejs reports an error

When using Node.js to develop Oracle database applications, you may encounter some errors. This article will introduce some common Oracle Node.js errors and provide solutions.

1. Error: DPI-1047: 64-bit Oracle Client library cannot be loaded

When using Node.js to access the Oracle database, you may encounter "DPI- 1047" error. This error is usually caused by the Oracle client library not being installed correctly or the required library path not being found in the environment variables.

Solution:

1) Check whether the Oracle client library is installed correctly.

2) If already installed, make sure the user environment variable contains the correct library path.

3) If you need to set the Oracle client library path from the Node.js application, you can use the following method:

Oracle Instant Client:

process.env.ORACLE_HOME = '/path/to/instantclient_18_3';
process.env.LD_LIBRARY_PATH = '/path/to/instantclient_18_3';

Oracle Database Client:

process.env.ORACLE_HOME = '/path/to/oracle/client/18.3';
process.env.LD_LIBRARY_PATH = '/path/to/oracle/client/18.3/lib';

2. Error: NJS-045: cannot load the oracledb add-on binary for Node.js

This error is usually caused by the oracledb module not being installed correctly, or the installation Some problems occurred during the process.

Solution:

1) Make sure the Node.js version matches the oracledb module version.

2) Check whether the necessary dependencies, such as Oracle Instant Client or Oracle Database Client, have been installed.

3) If already installed, make sure the user environment variable contains the correct library path.

4) Update or reinstall the oracledb module.

3. Error: NJS-040: connection request rejected

This error is usually caused by the Oracle database instance being unable to handle more connection requests.

Solution:

1) Increase the database connection pool size.

2) Check the resource usage of the database instance, such as CPU, memory and disk space.

3) Optimize the application to reduce connection requests.

4) Use a connection pool manager in your application to better manage connections.

Summary:

When using Node.js to develop Oracle applications, you often encounter various errors. This article introduces some common errors and provides solutions. I hope it can help everyone better develop Oracle Node.js applications.

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