Petals BC REST

<ns3:consulter xmlns:ns3="http://petals.ow2.org/bc/rest/unit-test/ged">
    <ns3:library>My Documents</ns3:library>
    <ns3:reference>my/identifier</ns3:reference>
</ns3:consulter>

GET http://localhost:10080/unit-tests/library/{library}/document/{reference}/metadata

2020/03/17 15:06:41,010 GMT+0100 MONIT [org.ow2.petals.component.framework.UnderTestWithDefaultConf] :  traceCode = 'provideExtFlowStepBegin', flowInstanceId = '864f5be0-6858-11ea-b4d1-0242c26ca283', flowStepId = '866fb520-6858-11ea-b4d1-0242c26ca283', flowPreviousStepId = '8653a1a0-6858-11ea-b4d1-0242c26ca283', requestedURL = 'http://localhost:10080/unit-tests/library/My%20Documents/document/my%2Fidentifier/metadata'
2020/03/17 15:06:41,239 GMT+0100 MONIT [org.ow2.petals.component.framework.UnderTestWithDefaultConf] :  traceCode = 'provideExtFlowStepFailure', flowInstanceId = '864f5be0-6858-11ea-b4d1-0242c26ca283', flowStepId = '866fb520-6858-11ea-b4d1-0242c26ca283', failureMessage = 'A business error occurs', httpStatus = '[500 Server Error]'
2020/03/17 15:06:41,239 GMT+0100 FINE [org.ow2.petals.component.framework.UnderTestWithDefaultConf] : HTTP code returned: HTTP/1.1 500 Internal Server Error
2020/03/17 15:06:41,239 GMT+0100 FINE [org.ow2.petals.component.framework.UnderTestWithDefaultConf] : HTTP response content-type 'null' processed as 'auto': 
2020/03/17 15:06:41,239 GMT+0100 WARNING [org.ow2.petals.component.framework.UnderTestWithDefaultConf] : Can't set JBI Exchange content from HTTP Response
javax.jbi.messaging.MessagingException: Error 500 Internal Server Error
	at org.ow2.petals.binding.rest.exchange.outgoing.configurations.RESTRequestConfiguration.doBuildJBIReply(RESTRequestConfiguration.java:572)
	at org.ow2.petals.binding.rest.exchange.outgoing.configurations.RESTRequestConfiguration.buildJBIReply(RESTRequestConfiguration.java:518)
	at org.ow2.petals.binding.rest.exchange.outgoing.configurations.RESTRequestConfiguration$Callback.completed(RESTRequestConfiguration.java:299)
	at org.ow2.petals.binding.rest.exchange.outgoing.configurations.RESTRequestConfiguration$Callback.completed(RESTRequestConfiguration.java:1)
	at org.apache.http.concurrent.BasicFuture.completed(BasicFuture.java:123)
	at org.apache.http.impl.nio.client.DefaultClientExchangeHandlerImpl.responseCompleted(DefaultClientExchangeHandlerImpl.java:181)
	at org.apache.http.nio.protocol.HttpAsyncRequestExecutor.processResponse(HttpAsyncRequestExecutor.java:439)
	at org.apache.http.nio.protocol.HttpAsyncRequestExecutor.inputReady(HttpAsyncRequestExecutor.java:329)
	at org.apache.http.impl.nio.DefaultNHttpClientConnection.consumeInput(DefaultNHttpClientConnection.java:265)
	at org.apache.http.impl.nio.client.InternalIODispatch.onInputReady(InternalIODispatch.java:81)
	at org.apache.http.impl.nio.client.InternalIODispatch.onInputReady(InternalIODispatch.java:39)
	at org.apache.http.impl.nio.reactor.AbstractIODispatch.inputReady(AbstractIODispatch.java:114)
	at org.apache.http.impl.nio.reactor.BaseIOReactor.readable(BaseIOReactor.java:162)
	at org.apache.http.impl.nio.reactor.AbstractIOReactor.processEvent(AbstractIOReactor.java:337)
	at org.apache.http.impl.nio.reactor.AbstractIOReactor.processEvents(AbstractIOReactor.java:315)
	at org.apache.http.impl.nio.reactor.AbstractIOReactor.execute(AbstractIOReactor.java:276)
	at org.apache.http.impl.nio.reactor.BaseIOReactor.execute(BaseIOReactor.java:104)
	at org.apache.http.impl.nio.reactor.AbstractMultiworkerIOReactor$Worker.run(AbstractMultiworkerIOReactor.java:588)
	at java.lang.Thread.run(Thread.java:748)