Learning Outcomes

• Understand the purpose of the run logs.
• Identify various log files generated during the run.
• Recognize error messages and their implications on the run status.

Run Logs

This section provides an overview of the run logging functionality. You can monitor each stage of the run both before and after the execution of Nextflow.

Server Logs

You can effectively track each stage of the run by reviewing the various logs available under server logs:

Below are brief descriptions and call outs of the log files generated during the execution of a run:

trace.txt

This text file contains a detailed trace of the execution, including execution time and task completion.

.nextflow.log

This log file includes information about the Nextflow runtime, including warnings and errors.

nextflow.nf

This script file contains the main Nextflow pipeline definition.

nextflow.config

This configuration file specifies the parameters used throughout the Nextflow execution.

timeline.html

This file provides a visual representation of the run timeline. Breaking down each process executed and it's overall execution.

Error Monitoring

If an error occurs at any point during the run, a detailed explanation will be provided, and the status of the run will change to Run Error.