Hi, all.
I'm using maven to create an OSGi bundle and then maven-sling-plugin to install
it ("mvn clean package install"). One odd thing happens, though, every single
time the install occurs. When trying to access my site via HTTP I get a
"java.lang.NoClassDefFoundError: org/apache/sling/api/resource/Resource". I
can resolve this by stopping and starting the "Apache Sling Scripting Core
implementation" bundle.
Interestingly, this only happens for pages where I'm using Velocity as the
scripting language. I used the Velocity scripting engine in the "contrib"
area. It generally works great except for this particular issue. Pages that
are purely JSP based don't seem to have the problem. There is a reason for
this. While my OSGi bundle doesn't, of course, contain any Velocity templates
or anything like that (it is just Java code that acts as helpers) it does
include a BindingsValuesProvider for the use of the Velocity templates stored
in /apps.
The exact line which throws the error is in my BindingsValuesProvider. It is
simply:
Resource theResource = (Resource) inBindings.get("resource");
And the odd thing is that it is a NoClassDefFoundError which is cleared up by
simply restarting the Sling scripting core bundle.
Caused by: java.lang.NoClassDefFoundError:
org/apache/sling/api/resource/Resource
at
org.consumersunion.cq.CUBindingsValuesProvider.addCurrentNodeAndCurrentData(CUBindingsValuesProvider.java:57)
at
org.consumersunion.cq.CUBindingsValuesProvider.addBindings(CUBindingsValuesProvider.java:49)
at
org.apache.sling.scripting.core.impl.DefaultSlingScript.verifySlingBindings(DefaultSlingScript.java:688)
at
org.apache.sling.scripting.core.impl.DefaultSlingScript.call(DefaultSlingScript.java:185)
at
org.apache.sling.scripting.core.impl.DefaultSlingScript.eval(DefaultSlingScript.java:170)
at
org.apache.sling.scripting.core.impl.DefaultSlingScript.service(DefaultSlingScript.java:456)
Has anyone seen something like this before? At first I thought I simply wasn't
waiting long enough after the bundle installation, but this happens no matter
how long I wait, but it is cleared up instantly when I restart the Sling
scripting core bundle.
Thanks for any help,
--David
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