How to Run different JAVA scripts using different JDK versions on the same LG

Running different Java scripts using different JDK versions on the same Load Generators in LoadRunner can be achieved by configuring the Java Runtime Environment (JRE) for each script individually. Here's a step-by-step guide:

1. Launch LoadRunner Agent as a Process: Start by launching the LoadRunner Agent on the Load Generator machine as a process. This can typically be done from the LoadRunner installation directory or through the command line.

Launch LoadRunner Agent as a Process:

• Syntax: start <path_to_loadrunner_agent_executable>
• Example: start C:\LoadRunner\bin\magentproc.exe

2. Enable Terminal Services: Before proceeding, ensure that Terminal Services are enabled on the Load Generator machine. This setting allows multiple users to log in and run processes concurrently.

Enable Terminal Services:

• Syntax: Navigate to Start -> Programs -> LoadRunner -> Advanced Settings -> Agent Configuration -> Enable Terminal Services

3. Set Up Different Terminal Sessions: Open a separate terminal session for each JDK environment required by the scripts. Log in as a different user for each session to ensure isolation.

Example: set JAVA_HOME=C:\Program Files\Java\jdk1.8.0_291




4. Configure JDK Environment: In each terminal session, set up the environment variables to point to the respective JDK version required by the associated script. This ensures that each session uses the correct JDK.

5. Launch LoadRunner Agent: In each terminal session, launch the LoadRunner Agent process. The Agent will inherit the JDK environment specified in the session's environment variables.

Launch LoadRunner Agent:

• Syntax: start <path_to_loadrunner_agent_executable>
• Example: start C:\LoadRunner\bin\magentproc.exe

6. Connect Controller to Each Session: In the LoadRunner Controller, connect to each terminal session on the Load Generator machine using the appropriate connection method (e.g., RDP). Each session will be identified as LG:0, LG:1, LG:2, and so on.

7. Set Sessions to "Ready" State: Once connected, ensure that each session is in a "Ready" state in the Controller. This indicates that the LoadRunner Agent process is running and ready to execute scripts.

8. Run Scripts: Finally, run each script in the corresponding session that has the respective JDK environment configured. The scripts will execute using the JDK specified for each session, allowing concurrent execution of scripts requiring different JDK versions.

By following these steps, you can effectively manage and execute multiple scripts with different JDK requirements concurrently on a single Load Generator using Terminal Services. This approach provides flexibility and isolation for running scripts with diverse JDK dependencies.

"Failed to read file" when loading parameter file in VuGen | Load runer parameter errors

The error "Failed to read file" in VuGen typically occurs when there is an issue with the parameter file you are trying to load. Here are several steps you can take to troubleshoot and resolve this issue:

1. Check File Path: Ensure that the parameter file you are trying to load exists in the specified location. Verify the file path and make sure there are no typos or errors in the path.

2. File Format: Confirm that the parameter file is in the correct format and is not corrupted. VuGen supports various parameter file formats such as CSV (comma-separated values), TXT (plain text), DAT (data), etc. Make sure the file is saved in a compatible format.

3. File Permissions: Check the file permissions to ensure that VuGen has the necessary read access to the parameter file. If the file is restricted or located in a protected directory, VuGen may encounter issues while trying to read it.

4. File Encoding: Verify the encoding of the parameter file. VuGen supports different character encodings, such as UTF-8, ANSI, Unicode, etc. Ensure that the encoding of the file matches the expected encoding in VuGen.

5. File Content: Review the content of the parameter file for any irregularities or unexpected characters. Remove any special characters or formatting that may be causing parsing errors.

6. VuGen Version Compatibility: Ensure that the parameter file is compatible with the version of VuGen you are using. Sometimes, parameter files created in newer versions may not be fully compatible with older versions of VuGen.

7. Try a Different File: If the issue persists, try loading a different parameter file to see if the problem is specific to the file you are currently using. This can help determine if the issue lies with the file itself or with VuGen.

8. Restart VuGen: Close VuGen and reopen it to see if the error persists. Sometimes, restarting the application can resolve temporary issues or glitches.

9. Update VuGen: If you are using an older version of VuGen, consider updating to the latest version. Newer versions may include bug fixes and improvements that address issues related to loading parameter files.