[RAMPART-161] java.util.ConcurrentModificationException while a token is associated with a user when sevaral users are using a service

• Type: Bug
• Status: Resolved
• Priority: Blocker
• Resolution: Fixed
• Fix Version/s: 1.4
• Component/s: rampart-trust
• Assignee: Ruchith B. Gunaratne
• Reporter: Keith Godwin Chapman
• Created: 07/May/08 07:56
• Updated: 27/May/08 05:12
• Resolved: 08/May/08 09:06

Description

In the WSO2 Mashup Server [1] we use rampart to secure some backend services using UT. We ran a load test where a user logs in (the login service is secured via UT) and adds a user. When a user is added hes details are also added to the token store so that he can login too. When we ran the above scenario we got a java.util.ConcurrentModificationException. You can refer to the JIRA at [2]. The issue is that when reading the class SimpleTokenStore gets a iterator on a map and then when a user is added details are added to this map. When this happens concurrently the above issue occurs.

[1] http://wso2.org/projects/mashup
[2] https://wso2.org/jira/browse/MASHUP-789