AnsweredAssumed Answered

XMLStreamException calling REST deployments/{depID}/resources

Question asked by joeysr20det on Aug 7, 2014
Latest reply on Aug 20, 2014 by jbarrez
I'm making a REST call to get the resources of a deployment in the repository. I have success calling:

http://mouse:8084/activiti-rest/service/repository/deployments/1506

to get the deployment info, but when I call:

http://mouse:8084/activiti-rest/service/repository/deployments/1506/resources

I get a HTTP 500 with the error message:

"An exception occured writing the response entity"

and this big long nasty stack trace in my Tomcat log:


Aug 07, 2014 4:46:00 PM org.restlet.engine.log.LogFilter afterHandle
INFO: 2014-08-07   16:46:00   2001:0:9d38:6ab8:10db:3a91:f5ff:ff43   kermit   2001:0:9d38:6ab8:10db:3a91:f5ff:ff43   8084   GET   /activiti-rest/service/repository/deployments/1506/resources   -   200   -   0   63   http://mouse:8084   Mozilla/5.0 (Windows NT 6.1; WOW64; rv:31.0) Gecko/20100101 Firefox/31.0   -
Aug 07, 2014 4:46:00 PM org.restlet.engine.adapter.ServerAdapter commit
SEVERE: An exception occured writing the response entity
java.io.IOException: javax.xml.stream.XMLStreamException: Trying to output second root, <ArrayList>
   at com.fasterxml.jackson.dataformat.xml.util.StaxUtil.throwXmlAsIOException(StaxUtil.java:24)
   at com.fasterxml.jackson.dataformat.xml.ser.ToXmlGenerator._handleStartObject(ToXmlGenerator.java:428)
   at com.fasterxml.jackson.dataformat.xml.ser.ToXmlGenerator.writeStartObject(ToXmlGenerator.java:397)
   at com.fasterxml.jackson.databind.ser.BeanSerializer.serialize(BeanSerializer.java:138)
   at com.fasterxml.jackson.databind.ser.impl.IndexedListSerializer.serializeContents(IndexedListSerializer.java:100)
   at com.fasterxml.jackson.databind.ser.impl.IndexedListSerializer.serializeContents(IndexedListSerializer.java:21)
   at com.fasterxml.jackson.databind.ser.std.AsArraySerializerBase.serialize(AsArraySerializerBase.java:186)
   at com.fasterxml.jackson.databind.ser.DefaultSerializerProvider.serializeValue(DefaultSerializerProvider.java:222)
   at com.fasterxml.jackson.dataformat.xml.ser.XmlSerializerProvider.serializeValue(XmlSerializerProvider.java:87)
   at com.fasterxml.jackson.databind.ObjectWriter._configAndWriteValue(ObjectWriter.java:683)
   at com.fasterxml.jackson.databind.ObjectWriter.writeValue(ObjectWriter.java:534)
   at org.restlet.ext.jackson.JacksonRepresentation.write(JacksonRepresentation.java:474)
   at org.restlet.engine.adapter.ServerCall.writeResponseBody(ServerCall.java:519)
   at org.restlet.engine.adapter.ServerCall.sendResponse(ServerCall.java:463)
   at org.restlet.ext.servlet.internal.ServletCall.sendResponse(ServletCall.java:430)
   at org.restlet.engine.adapter.ServerAdapter.commit(ServerAdapter.java:196)
   at org.restlet.engine.adapter.HttpServerHelper.handle(HttpServerHelper.java:153)
   at org.restlet.ext.servlet.ServerServlet.service(ServerServlet.java:1118)
   at javax.servlet.http.HttpServlet.service(HttpServlet.java:722)
   at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305)
   at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
   at org.netbeans.modules.web.monitor.server.MonitorFilter.doFilter(MonitorFilter.java:393)
   at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
   at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
   at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:225)
   at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:169)
   at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:472)
   at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:168)
   at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:98)
   at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:927)
   at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
   at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:407)
   at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:999)
   at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:565)
   at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:309)
   at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
   at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
   at java.lang.Thread.run(Thread.java:745)
Caused by: javax.xml.stream.XMLStreamException: Trying to output second root, <ArrayList>
   at com.ctc.wstx.sw.BaseStreamWriter.throwOutputError(BaseStreamWriter.java:1522)
   at com.ctc.wstx.sw.BaseStreamWriter.throwOutputError(BaseStreamWriter.java:1529)
   at com.ctc.wstx.sw.BaseStreamWriter.reportNwfStructure(BaseStreamWriter.java:1557)
   at com.ctc.wstx.sw.BaseNsStreamWriter.checkStartElement(BaseNsStreamWriter.java:469)
   at com.ctc.wstx.sw.RepairingNsStreamWriter.writeStartOrEmpty(RepairingNsStreamWriter.java:255)
   at com.ctc.wstx.sw.BaseNsStreamWriter.writeStartElement(BaseNsStreamWriter.java:310)
   at com.fasterxml.jackson.dataformat.xml.ser.ToXmlGenerator._handleStartObject(ToXmlGenerator.java:426)
   … 36 more




Anyone seen anything like this? Also I'm stilling getting XML on some of my REST responses from Activiti while others are JSON as they should be. Are there some issues with the Activiti 5.16 REST stack? I want to make sure our workflow editor will work with 5.16, but I'm getting ready to rollback to 5.15 and just certify it for instead. 5.16 just isn't working well for me.

Outcomes