stdout.log is flooded with Synchrony Healthcheck exceptions

Issue Summary

The stdout.log is being flooded with Synchrony Healthcheck exceptions every 30 seconds. They currently appear to be harmless.

They are not present in atlassian-confluence.log, atlassian-diagnostics.log or atlassian-synchrony.log

Expected Results

The exception is not present.

Actual Results

The below exception is thrown in the stdout.log file:

java.lang.IllegalArgumentException: No converter found for return value of type: class com.atlassian.synchrony.proxy.web.HealthCheckResult

Workaround

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