[jboss-jira] [JBoss JIRA] (WFLY-1172) mechanism to load tag libraries from module

[Frank Langelage (JIRA)]

    [ https://issues.jboss.org/browse/WFLY-1172?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12997234#comment-12997234 ] 

Frank Langelage commented on WFLY-1172:
---------------------------------------

This implementation created a big performance drop when deploying my ear.
Before it took about 1 min 15s to deploy, now the 5 minutes are not enough and deployment gets a timeout and is stopped.
My ear is of 22 MB size, contains 23 ejb and web modules.
If I revert changes in UndertowSubsystemAdd.java everything is fine again.
I added some debug statements to ExternalTldParsingDeploymentProcessor.java and found out, that line 83 is causing the problem.
The first call of next for a deploymentunit takes a lot of time, subsequent calls for the same DU are no problem then.
Getting the first element takes about 1m - 1m 30s and lot of memory is used, as I see many lines of the garbage collector in this period.


> mechanism to load tag libraries from module
> -------------------------------------------
>
>                 Key: WFLY-1172
>                 URL: https://issues.jboss.org/browse/WFLY-1172
>             Project: WildFly
>          Issue Type: Feature Request
>      Security Level: Public(Everyone can see) 
>          Components: Web (Undertow)
>            Reporter: Ivica Loncar
>            Assignee: Stuart Douglas
>            Priority: Critical
>              Labels: modules, tag, taglib, tld
>             Fix For: 9.0.0.Beta1
>
>   Original Estimate: 1 day
>  Remaining Estimate: 1 day
>
> tag libraries are scanned only if they appear in jar inside WEB-INF/lib or are defined in tld under WEB-INF.
> The simplest scenario to explain why this is a problem: portlet 2 defines standard portlet taglib, but the classes in this file come from concrete implementations. Currently I see no way to use 2 different portals in a portable way.
> Please provide a way to notify a relevant subsystem for web applications that specific module contains a .tld.



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