[NIFI-3853] Escape configurations prior to writing flow.xml

• Type: Bug
• Status: Resolved
• Priority: Critical
• Resolution: Fixed
• Fix Version/s: 1.3.0
• Component/s: Core Framework
• Assignee: Matt Gilman
• Reporter: Matt Gilman
• Created: 09/May/17 17:00
• Updated: 30/Apr/20 17:13
• Resolved: 18/May/17 17:38

Description

If invalid characters are entered through the UI, they can corrupt the flow.xml.gz making it unparsable on future restarts. Once in this state, the flow.xml.gz needs to be hand-edited to remove the invalid characters. Characters outside the following ranges may cause issues:

#x9 | #xA | #xD | [#x20-#xD7FF] | [#xE000-#xFFFD] | [#x10000-#x10FFFF]

Issue Links

• relates to: NIFI-7414 NiFi fails to startup if it encounters some unicode characters in the flow.xml.gz
• links to: GitHub Pull Request #1784
• links to: GitHub Pull Request #1822