Markdown Macro server to cloud migration troubleshooting

Collect server log and CCMA screenshot

In any case we should ask customer:

Provide cloud site URL
Enable log on server side https://confluence.atlassian.com/doc/configuring-logging-181535215.html#ConfiguringLogging-TemporarilychangeloggingbehaviourwhileConfluenceisrunning
- com.atlassian.migration
- com.atlassian.plugins.confluence.markdown.confluence-markdown-macro
Update CCMA and Markdown Macro server app to latest version (for more accurate error message)
Trigger a new migration and report back to us with the screenshot of CCMA UI (with the message section expanded) and server app logs.
- Collecting Logs

The first thing to check should be the error message reported by cloud app:

Error message
`App version ${serverAppVersion} is not migration compatible. Please upgrade to latest version.`	Customer need to upgrade Markdown Macro server app to latest version.
`Error while preparing migration payload in server app: <exception_message>`	We need to analyze server logs to see what happen when preparing migration payload.
`Cloud app did not receive migration payload from server app`	Two hours after the migration start, if cloud app still does not receive the `app-data-uploaded` event then it will report progress as failed with this message. It is probably due to network issue on the server side. If there is any outbound proxy setup on customer’s server, then it must be configured to enable S3 endpoint: `https://rps--prod-east--app-migration-service--ams.s3.amazonaws.com`
`Failed to download/persist migration data from S3`	The cloud app does receive the migration payload but failed to parse it. If something goes wrong when preparing migration payload from server side, CCMA will send an empty payload to cloud app, causing this error. We don’t have much experience with this kind of error so we need to do investigation case by case.