[NIFI-7994] ReplaceText concurrency issue

• Type: Bug
• Status: Resolved
• Priority: Critical
• Resolution: Fixed
• Fix Version/s: 1.13.0
• Component/s: Extensions
• Assignee: Peter Turcsanyi
• Reporter: Peter Turcsanyi
• Created: 10/Nov/20 21:05
• Updated: 01/Dec/20 13:23
• Resolved: 12/Nov/20 15:45

Description

ReplaceText, when scheduled to run with multiple Concurrent Tasks, can result in corrupted data due to the concurrent / unprotected usage of additionalAttrs map (storing the capturing groups with their current matches) in RegexReplace class (https://github.com/apache/nifi/blob/badcfe1ab7b7166decb92a0d427ba48fbf613400/nifi-nar-bundles/nifi-standard-bundle/nifi-standard-processors/src/main/java/org/apache/nifi/processors/standard/ReplaceText.java#L497).

Issue Links

• fixes: NIFI-8053 ReplaceText with Expression Language in Match Group results in Data Loss/Corruption
• links to: GitHub Pull Request #4654