Summary

Confluence Export fails due to connection with Media Services (the service that handles attachments).
This is impacting all exports: Page export, space export and site backup.

Customer Impact

Unable to generate any type of export.

Expected Results

Backup file is generated and provide a link to download.

Actual Results

Export is failed at 0%.

Time Elapsed: 1 minute, 31 seconds
Time Remaining: Unknown (estimated)
Completion: 0% complete

Export error
Unexpected error during export has occurred
But don't worry, we'll fix it for you!
You just need to contact Atlassian support and paste in this error message, timestamp and your instance details.
Timestamp: 2018-08-24T02:23:46.500

Application logs:

Giving up retrying ResilientMediaApiClient::uploadChunk after 6 retries

com.atlassian.confluence.importexport.ImportExportException: com.atlassian.confluence.importexport.ImportExportException: Failed to upload application/pdf file to filestore. Failure: Failure{cause=org.apache.http.conn.ConnectionPoolTimeoutException: Timeout waiting for connection from pool, reason=TRANSPORT_ERROR, message='null', httpStatusCode=null}