[FLINK-13789] Transactional Id Generation fails due to user code impacting formatting string

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 1.8.2, 1.9.1, 1.10.0
• Labels: pull-request-available
• Assignee: Hao Dang
• Reporter: Hao Dang
• Created: 19/Aug/19 19:33
• Updated: 28/Aug/19 11:58
• Resolved: 28/Aug/19 11:49

Description

In TransactionalIdsGenerator.java], prefix contains taskName of the particular task which could ultimately contain user code.  In some cases, user code contains conversion specifiers like %, the string formatting could fail.

For example, in Flink SQL code, user could have a LIKE statement with a % wildcard, the % wildcard will end up in the prefix and get mistreated during formatting, causing task to fail.

Think we should move prefix out of the string formatting.

Issue Links

• is duplicated by: FLINK-10478 Kafka Producer wrongly formats "%" for transaction ID
• links to: GitHub Pull Request #9486