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Steps to Reproduce:
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1) Place a beans.xml file with interceptors configured in WEB-INF\classes\META-INF (tested in a exploded WAR)
2) Place a breakpoint on org.jboss.weld.environment.servlet.deployment.WebAppBeanDeploymentArchive in line 65.

just after this line: scanner.scanResources(new String[] { META_INF_BEANS_XML }
, classes, urls);
3) You will see that each element in the List called urls List has the same value. The size of the List is proportional to the found beans.xml in your application (including those inside WEB-INF/lib)
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1) Place a beans.xml file with interceptors configured in WEB-INF\classes\META-INF (tested in a exploded WAR) 2) Place a breakpoint on org.jboss.weld.environment.servlet.deployment.WebAppBeanDeploymentArchive in line 65. just after this line: scanner.scanResources(new String[] { META_INF_BEANS_XML } , classes, urls); 3) You will see that each element in the List called urls List has the same value. The size of the List is proportional to the found beans.xml in your application (including those inside WEB-INF/lib)
Workaround:

Workaround Exists
Workaround Description:

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Place beans.xml under WEB-INF

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Place beans.xml under WEB-INF

URLScanner parses the same beans.xml file if beans.xml is in WEB-INF/classes/META-INF in a WAR package.

This is due to misuse of the ClassLoader (it´s invoking getResource in method handleArchiveByFile, so it´s not getting the absolute URL)

is duplicated by

WELD-724 Failure to load beans.xml from multiple locations

is related to

WELD-958 URLScanner parses the wrong META-INF/beans.xml files if the parent classloader has a META-INF/beans.xml file

relates to

WELD-719 multiple beans.xml causes classes to be added twice