[AAA-141] Servlet alias conflict with Dlux Created: 31/Jul/17  Updated: 21/Mar/19  Resolved: 01/Aug/17

Status: Resolved
Project: aaa
Component/s: General
Affects Version/s: None
Fix Version/s: None

Type: Bug
Reporter: Daniel Malachovsky Assignee: Unassigned
Resolution: Done Votes: 0
Labels: None
Remaining Estimate: Not Specified
Time Spent: Not Specified
Original Estimate: Not Specified
Environment:

Operating System: All
Platform: All

Attachments: Text File bug.txt    
External issue ID: 8915
Priority: Highest

 Description   

Hi,

I received several emails from downstream projects, that Dlux bases UIs are broken in Nitrogen.

After some investigation found this: Caused by: org.osgi.service.http.NamespaceException: alias: '/' is already in use in this or another context

This error appears in Karaf log after feature:install odl-dlux-core.

http:list command in karaf console pointed me to aaa project and aaa-shiro feature. In aaa/aaa-shiro/impl/pom.xml found this: <Web-ContextPath>/</Web-ContextPath>
When i changed value to /moon, rebuilt aaa, dlux and distribution, GUI started working, but i'm not sure if i didn't broke aaa.

I'm not familiar with aaa project and Jetty at all, so don't know if this is valid configuration change, but there is a conflict and we should resolve it somehow.

Thanks

 Comments   
Comment by Daniel Malachovsky [ 31/Jul/17 ]

Attachment bug.txt has been added with description: Error message from Karaf log

Comment by Ryan Goulding [ 31/Jul/17 ]

I think what we want will be closer to this:

https://git.opendaylight.org/gerrit/#/c/60957/

still testing

Comment by Ryan Goulding [ 31/Jul/17 ]

Final analysis:

Both bundles try to own the root servlet context. Neither probably should. AAA backed off in the above patch, and dlux should do the same in the future. For now, its fine to keep it for backwards compatibility reasons.

We should better document how this stuff works in the future. In general projects just rely on RESTCONF for web interaction, but these two projects are special circumstances/exceptions to the rules.

This won't ever be caught at compile time with current jetty code unfortunately, and the CI test would take a while to perform so we need to just document better for now.

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