You would need to provide the upgrade.log for review or carefully go though warning and errors as this would give an indication why this task failed

Can you add '-Djavax.net.debug=all' to your startup arguments, restart the system and retest the scenario ? Once replicated, share the stdout.log for review

You need to create your custom object for newrelic to consume replication JMX mbeans. See (1) to understand how to go about it.Mbean to be consumed for replication would be (2)(1) : Custom JMX instrumentation by YAML | New Relic Documentation (2) : http://HOST:PORT/system/console/jmx/com.adobe.grani...

Rollout button is missing or disabled ? If it is disabled, Go to the livecopy page and the jcr:content where the cq:LiveSync config node resides. Check for the excluded pages and isDeep value. Adjust the excluded pages to remove the page where page is disabled and set isDeep is true and try replicat...

These won't create high memory consumption. I would suggest to generate a heap dump at the time of this situation and analyze it using MAT or any similar to identify the root cause.

Can you try to stop the acs commons bundle and retry to reveal the actual error ?

That doesn't help either and looks like there is something bigger to just replication. Can do the following or maybe open a support case with Adobe as this might require deeper investigation- Stop the instance- Rename the logs folder- Start the instance- Share the error, stdout.log

I wasn't expecting this one. Can you check the error.log at publish instance http://h0001995:4503​ once you do this test connection

Response: 503 ServletResolver service missing, cannot service requests\There should be a error/warn message in the error.log as well. Can you attach the same ?

Couple of questions on what led to this occurrence :Was this instance ever working ? Did we do any updates to the platform ? OS, JDK etc. ? Do we have valid backup before this issue occurred so that we can restore to previous state ?Any network or abrupt shutdown before this issue happenned ?