Support Article
Email Pollers Intermittently Slow Since Upgrade to 7.1.8
SA-15806
Summary
Email listeners are intermittent, slow after Pega 7.1.8 upgrade from Pega 7.1.6. The listeners take longer to process mail items. Items are marked as read in mailbox yet can be deleted from the mailbox. Cases are slow to start.
Error Messages
Not Applicable
Steps to Reproduce
Processing of Emails by Email Listeners takes too long.
Root Cause
A defect or configuration problem in the operating environment:
The issue is caused by IMAP Partial Fetch functionality. Some later versions of JavaMail don't perform as well with IMAP partial fetch. The new release of Javamail jars (mail-1.5.2.jar) in version 7.1.8. might be causing poor performance.
Resolution
Turn off partial fetch functionality while IMAP fetches mail, via one of two methods:
1. Have Dynamic Setting email/partialrefresh = false (mentioned in prpc help)
2. Add the following setting to Email Listener properties: mail.imap.partialfetch = false
Published January 31, 2016 - Updated October 8, 2020
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