Summary

When adding a Gmail IMAP mail server and incoming mail handler, the following message is logged in my catalina.out multiple times a second:

2018-04-13 10:54:42,089 Caesium-1-2 INFO anonymous    gmail-hand [c.a.mail.incoming.mailfetcherservice] Calling handleMessage

Environment

• I can reproduce this on-demand in my local 7.6.2 instance
• Colleague can reproduce in 7.4.x
• Customers are seeing this in 7.6.1 and 7.8.0(GHS-112421)

Steps to Reproduce

1. Create Gmail IMAP mail server
2. Create Core/Software mail handler
3. Tail the catalina.out

Expected Results

No diagnostic logging

Actual Results

The below INFO logging is added to the catalina.out file:

2018-04-13 10:54:42,089 Caesium-1-2 INFO anonymous    gmail-hand [c.a.mail.incoming.mailfetcherservice] Calling handleMessage

Notes

• Jira logs messages at INFO level, while it should at DEBUG for each invocation of processMessage method, which is for each message.

Workaround

• Since logging will be added for each message, deleting unnecessary emails ('Mail Delivery failure', Out of Office replies, etc ) will reduce amount of logging.
• Modify the $JIRA_HOME/atlassian-jira/WEB-INF/classes/log4j.properties file to set the com.atlassian.mail.incoming.mailfetcherservice class to only log at WARN level.

  # ADD THIS NEW LOGGER TO STOP LOG SPAM
  log4j.logger.com.atlassian.mail.incoming.mailfetcherservice = WARN, incomingmaillog