Rupert Westenthaler created STANBOL-1045:
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Summary: SolrCommons need to override the ContextClassLoader when
loading Solr Analyzers
Key: STANBOL-1045
URL: https://issues.apache.org/jira/browse/STANBOL-1045
Project: Stanbol
Issue Type: Improvement
Reporter: Rupert Westenthaler
Assignee: Rupert Westenthaler
Priority: Minor
With Solr it is necessary to reset the ContextClassLoader to the Bundle
ClassLoader when initializing Analyzers. This is because Solr also considers
the ContextClassLoader for loading those classes and if Stanbol does run within
an embedded OSGI environment this might result in Solr versions used by the
host application to leak into OSGI. This usually results in ClassCastExceptions.
While the SolrServerAdapter (commons.solr.core) has done this already with the
upgrade to Solr 4 this is now also necessary for the BundleActivators used by
all commons.solr.extra modules. Otherwise those would find
"META-INF/services/{solr-component}.properties" files via the
ContextClassLoader pointing to class files of the host application. While
loading the classes would work the cast to the according interface would end
with an ClassCastException as the interface is loaded via the Bundle
ClassLoader.
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