Hi, Yeah, if hapi-osgi-base bundle embed xerces jar, it's definitely the cause. And it's not the best practice in OSGi world that a bundle embed any jar, it should use the one from OSGi container. You may need re-wrap hapi-osgi-base yourself to fix it. －－－－－－－－－－－－－ Freeman(Yue) Fang
Red Hat, Inc. FuseSource is now part of Red Hat Web: http://fusesource.com | http://www.redhat.com/ Twitter: freemanfang Blog: http://freemanfang.blogspot.com http://blog.sina.com.cn/u/1473905042 weibo: http://weibo.com/u/1473905042 On 2012-10-30, at 下午10:42, wdavjones wrote: > Hello. I'm getting classloader errors when using HAPI-OSGI (hapi-osgi-base) > which is installed with the Camel-HL7 feature. I suspect the problem is that > hapi-osgi-base embeds an older version of Xerces but I'm not familiar enough > with OSGi to be confident. My environment: ServiceMix 4.4.2, Camel 2.8.5, > JDK 1.6U7, WinXP. > > My route: > > <bean id="SimpleTranformer" > class="simple.messaging.app.SimpleTransformer" > /> > <camelContext trace="false" id="blueprintContext" > xmlns="http://camel.apache.org/schema/blueprint";> > <route id="simpleRoute"> > <from uri="file:src/input" /> > <bean ref="SimpleTranformer" method="transform" /> > <to uri="file://src/output" /> > </route> > </camelContext> > > SimpleTransformer.tranform(): > > Message message = HL7Converter.toMessage(body); > XMLParser xmlParser = new DefaultXMLParser(); // exception thrown here > (line 16) > return xmlParser.encode(message); > > Produces the following runtime exception: > > Caused by: java.lang.LinkageError: loader constraint violation: when > resolving method > "org.apache.xerces.parsers.DOMParser.<init>(Lorg/apache/xerces/xni/parser/XMLParserConfiguration;)V" > the class loader (instance of > org/apache/felix/framework/ModuleImpl$ModuleClassLoaderJava5) of the current > class, ca/uhn/hl7v2/parser/XMLParser, and the class loader (instance of > <bootloader>) for resolved class, org/apache/xerces/parsers/DOMParser, have > different Class objects for the type > org/apache/xerces/xni/parser/XMLParserConfiguration used in the signature > at > ca.uhn.hl7v2.parser.XMLParser.<init>(XMLParser.java:108)[138:ca.uhn.hapi.osgi-base:1.2] > at > ca.uhn.hl7v2.parser.XMLParser.<init>(XMLParser.java:99)[138:ca.uhn.hapi.osgi-base:1.2] > at > ca.uhn.hl7v2.parser.DefaultXMLParser.<init>(DefaultXMLParser.java:77)[138:ca.uhn.hapi.osgi-base:1.2] > at > simple.messaging.app.SimpleTransformer.transform(SimpleTransformer.java:16)[160:camel-blueprint:1.0.0.SNAPSHOT] > > > > > > -- > View this message in context: > http://servicemix.396122.n5.nabble.com/Classloader-error-when-using-HAPI-in-ServiceMix-tp5714801.html > Sent from the ServiceMix - User mailing list archive at Nabble.com.
