No output preview using a specific groundplex

Hi Tony - I input your question in SnapGPT. For your reference you can access SnapGPT in the upper nav bar of the Designer here:

Keep in mind SnpGPT can help you investigate any specific aspect of this issue, such as examining your GroundPlex configuration or helping you create a diagnostic pipeline.

Common Causes and Solutions:

1. GroundPlex Configuration Differences

The most likely cause is differences in GroundPlex configurations between the environments:

• JVM Settings: Different heap memory allocations or JVM parameters
• Node Resources: Varying CPU, memory, or disk space availability
• Network Configuration: Different proxy settings, firewall rules, or network latency
• SnapLogic Version: Different SnapLogic runtime versions between GroundPlex instances

2. Account and Authentication Issues

• Account Configuration: Verify that the same account is being used on both GroundPlex instances
• Permissions: Check if the GroundPlex has proper permissions to execute preview operations
• Authentication: Ensure authentication credentials are properly configured

3. Preview Data Execution Settings

Check the Snap Execution setting in your JSON Generator:

• Ensure it's set to "Validate & Execute" (not "Execute only")
• "Execute only" mode disables preview data generation during validation

4. GroundPlex-Specific Limitations

Some GroundPlex environments may have:

• Resource constraints that prevent preview execution
• Security policies that restrict certain operations
• Custom configurations that affect Snap behavior

5. Debugging Steps

1. Compare GroundPlex Settings:
   • Check the GroundPlex configuration in both environments
   • Compare JVM settings, memory allocation, and node configurations
2. Verify Snap Configuration:
   • Ensure the JSON Generator has identical settings in both environments
   • Check the "Snap execution" dropdown is set to "Validate & Execute"
3. Check GroundPlex Logs:
   • Review the GroundPlex logs for any errors or warnings during preview execution
   • Look for memory issues, timeout errors, or permission problems
4. Test with Simple Pipeline:
   • Create a minimal pipeline with just the JSON Generator
   • Test preview functionality to isolate the issue
5. Resource Monitoring:
   • Monitor CPU, memory, and disk usage during preview attempts
   • Check if the GroundPlex is under resource pressure

6. Immediate Workarounds

• Use Cloud Execution: Temporarily run the pipeline on the cloud to verify functionality
• Full Execution: Use "Execute only" mode and check the actual pipeline output
• Alternative Testing: Use a different Snap type to test preview functionality