[WICKET-6702] AsynchronousPageStore with NotDetachedModelChecker - "Not detached model found" exception on several fast sequential Ajax calls

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 8.5.0, 9.0.0
• Fix Version/s: 9.1.0, 8.10.0
• Component/s: wicket-core
• Assignee: Unassigned
• Reporter: Sergei Tkachuk
• Created: 23/Sep/19 09:09
• Updated: 15/Nov/20 19:20
• Resolved: 02/Oct/20 11:50

Description

Preconditions: Application uses AsynchronousPageStore (as it is by default).

When there are several fast sequential Ajax calls to a component, then a component's LoadableDetachableModel gets attached and detached several times before real async serialization takes place. And at times the serialization is initiated when the model has been already attached once again by a subsequent Ajax call, and not detached yet as the request is still in progress. This causes NotDetachedModelChecker() to throw "Not detached model found!" exception

Disabling async serialization fixes the problem.

A test-case and a log attached.

Issue Links

• is related to: WICKET-6831 Flush the response before detach
• mentioned in: Page Loading...