Log analyzer stops working after application restart

Issue Summary

On clean installation, after the first restart (after installation) log analyzer will stop working. It will continue to analyze log even past 100%, also it will not show the correct size of Atlassian-confluence.log.

Steps to Reproduce

Install Confluence 7.7.2 Data Center
Inspect Log Analyzer. It should work.
Restart Confluence
Inspect Log Analyzer

Expected Results

Log Analyzer would analyze logs and show results.

Actual Results

It will continue to run analysis even past 100% and get stuck.
Size of the Atlassian-confluience.log will be incorrectly displayed
Downgrading or upgrading Support Tools plugin (1.27.5, 1.27.2, 1.26.0, or 1.25.0) will not change the behavior.
Changing the path to a different log file and running it again will display the same behavior.

Workaround

Currently, there is no known workaround for this behavior. A workaround will be added here when available

Created from: https://jira.atlassian.com/browse/CONFSERVER-60222