Rupert Westenthaler created STANBOL-775:
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Summary: SolrServerPublishingComponent needs to intercept the
ContextClassLoader when instantiating the SolrDispatchFilter
Key: STANBOL-775
URL: https://issues.apache.org/jira/browse/STANBOL-775
Project: Stanbol
Issue Type: Sub-task
Reporter: Rupert Westenthaler
Priority: Minor
The "org.apache.solr.servlet.SolrDispatchFilter" initialises within the
constructor the Solr Adminhandler via the context Classloader. Because of that
any Apache Solr version used by the host system is leaking into Apache Stanbol
running within the embedded OSGI environment.
This causes Exceptions like
org.apache.solr.common.SolrException: java.lang.ClassCastException:
org.apache.xerces.jaxp.DocumentBuilderFactoryImpl cannot be cast to
javax.xml.parsers.DocumentBuilderFactory
at
org.apache.solr.servlet.SolrDispatchFilter.<init>(SolrDispatchFilter.java:79)
~[solr-core-3.6.1.jar:3.6.1 1362471 - thetaphi - 2012-07-17 12:46:54]
at
org.apache.stanbol.commons.solr.web.dispatch.DelegatingSolrDispatchFilter.<init>(DelegatingSolrDispatchFilter.java:80)
~[na:na]
at
org.apache.stanbol.commons.solr.web.impl.SolrServerPublishingComponent$SolrFilter.<init>(SolrServerPublishingComponent.java:346)
~[na:na]
at
org.apache.stanbol.commons.solr.web.impl.SolrServerPublishingComponent.updateFilter(SolrServerPublishingComponent.java:303)
~[na:na]
at
org.apache.stanbol.commons.solr.web.impl.SolrServerPublishingComponent$1.addOrUpdate(SolrServerPublishingComponent.java:192)
~[na:na]
at
org.apache.stanbol.commons.solr.web.impl.SolrServerPublishingComponent$1.addingService(SolrServerPublishingComponent.java:219)
~[na:na]
at
org.osgi.util.tracker.ServiceTracker$Tracked.customizerAdding(ServiceTracker.java:896)
~[stanbol-embedded-0.11.0-LMF-SNAPSHOT.jar:0.11.0-LMF-SNAPSHOT]
To solve this the best options is that the SolrServerPublishingComponent
replaces the context Classloader with the Bundle Classloader when instantiating
the SolrFilter (line 304)
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