Rupert Westenthaler created STANBOL-1413:
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Summary: NPE in Freemaker BundleTemplateLoader
Key: STANBOL-1413
URL: https://issues.apache.org/jira/browse/STANBOL-1413
Project: Stanbol
Issue Type: Bug
Components: Commons
Affects Versions: 0.12.0
Reporter: Rupert Westenthaler
Assignee: Rupert Westenthaler
Priority: Minor
Fix For: 1.0.0, 0.12.1
I very rare cases the Freemaker BundleTemplate loader is getting NPE when
loading resources from bundles.
{code}
java.lang.NullPointerException
at
org.apache.felix.framework.BundleRevisionImpl.getResourceLocal(BundleRevisionImpl.java:495)
at
org.apache.felix.framework.BundleWiringImpl.findClassOrResourceByDelegation(BundleWiringImpl.java:1472)
at
org.apache.felix.framework.BundleWiringImpl.getResourceByDelegation(BundleWiringImpl.java:1400)
at
org.apache.felix.framework.Felix.getBundleResource(Felix.java:1600)
at
org.apache.felix.framework.BundleImpl.getResource(BundleImpl.java:639)
at
org.apache.stanbol.commons.freemarker.impl.BundleTemplateLoader.containsTemplates(BundleTemplateLoader.java:117)
{code}
This NPE happens when trying to load the resource `templates/` via
{{Bundle.getResource(..)}}. Even if it appears it does only affect few of the
installed bundles.
As the call is only used to check if the folder `templates/` is available in a
bundle an exception MUST NOT break the whole BundleTemplateLoader
initialization. Because of that the code needs to be changed to catch this NPE
and log it on WARN level.
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