[FLINK-35796] Ensure that MailboxExecutor.submit is used correctly

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.0.0
• Component/s: Runtime / Task
• Labels: pull-request-available
• Assignee: Arvid Heise
• Reporter: Arvid Heise
• Created: 09/Jul/24 13:40
• Updated: 10/Jul/24 13:48
• Resolved: 10/Jul/24 07:52

Description

https://issues.apache.org/jira/browse/FLINK-34470 showed that MailboxExecutor.submit may result in unexpected exception handling: while execute will bubble up the exception in the task thread and result in some fault, submit can hide the exception because the API assumes that the returned Future is checked for it explicitly or implicitly.

We can solve the situation by improving the doc of MailboxExecutor and double-check the internal usages.

Issue Links

• links to: GitHub Pull Request #25062