[TAP5-2152] NPE in Form on Websphere 8 after applying load

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Cannot Reproduce
• Affects Version/s: 5.2.6
• Component/s: tapestry-core
• Labels: websphere
• Assignee: Unassigned
• Reporter: Christian Köberl
• Created: 31/Jul/13 12:28
• Updated: 28/Aug/14 06:05
• Resolved: 27/Aug/14 19:07

Description

A NullPointerException occurs Form.java:406 (Tapestry 5.2.6) when applying load - in any application deployed to Websphere 8.

Here's the corresponding line from Form.java:406:
resources.triggerEvent(EventConstants.PREPARE_FOR_RENDER, context, null);

The NPE first is raised after some parallel users are working with the application - before that everything works fine. After the first occurrence, the NPE is raised on any Form render on any page for all users. We have to restart the application to get it working again. We can reproduce the error with some load but the first NPE happens on different pages - so that's no clue.

The behavior can be reproduced with a quite simple application with some pages with forms: https://github.com/porscheinformatik/tapestry-was8

The behavior cannot be reproduced with JIT turned off.