[CAMEL-4274] MDCUnitOfWork behaviour incorrect with nested routes

• Type: Bug
• Status: Resolved
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 2.8.0
• Fix Version/s: 2.8.1, 2.9.0
• Component/s: camel-core
• Patch Info: Patch Available
• Assignee: Claus Ibsen
• Reporter: Yaytay
• Created: 27/Jul/11 06:11
• Updated: 02/Sep/11 09:47
• Resolved: 27/Jul/11 07:25

Description

MDCUnitOfWork.clear() removes any content set by MDCUnitOfWork from MDC.
If there are two separate exchange running at the same time in the same thread, as happens when a ProduceTemplate is used from Java, this is incorrect because the MDC of the parent is cleared after the child completes.
Conceptually the MDC should be a stack, but MDC only accepts strings so the simplest thing to do is for MDCUnitOfWork to replace the previous values in clear().