Logs¶
The Logs tab displays the workflow runner's log fetched from the run's S3 output directory. Available on the run detail page. For Nextflow runs, this is the *.nextflow.log file; for WDL it is the miniwdl log.
Behavior¶
- Multiple logs: After resume cycles, multiple log files may exist. Tracker displays the most recent and shows a warning.
- Large files: Only the last ~1 MB is shown, with a truncation warning indicating full file size. The tail is typically the most useful for debugging.
- Refresh: A button reloads the log without a full page refresh -- useful during active runs.
Error Messages¶
| Message | Cause |
|---|---|
| No output directory configured | Run has no output_dir set |
| No log files found | No *.nextflow.log files in the output directory |
| Multiple log files found | Multiple logs exist; most recent is shown |
| Log file is X MB. Showing last 1 MB. | Log exceeds preview limit; tail displayed |
| Access denied to S3 bucket | Tracker lacks S3 read permission |
| S3 bucket not found | Bucket in the output directory does not exist |
| Output directory is not an S3 path | Log preview requires an S3 URI |