Arvados

Symptom -- apparently related to issue #21834 - the process log files arv-mount.txt, crunchstat.txt, and hoststat.txt `are not showing the timestamps as they used to do in v2.7.3. This has cascading effect of making crunchstat_summary unable to parse the output, see source:tools/crunchstat-summary/crunchstat_summary/summarizer.py@7f01a21e3f250027510d16c32acd0c62173f1fec#L109 (I think at the end of the run the arv-mount.txt and crunchstat.txt files are used to generate the report). With the timestamp missing, the regular expression in L86 may match log lines by accident, but without capturing valid values for the groups, so we will hit that raise in the highlighted line. This will also be visible in WB2 as a warning message about failing to generate usage report.

The expected behavior (based on my understanding) is to consistently prefix each line in all of the applicable output logs with the timestamp, and the usage report can be created from them.

I've attached two output log collections, one with what I think is the "correct" behavior (from a run on v.2.7.3) and the other with missing timestamps (generated by the dev version).