From the exception stack it shows that, resteasy not recognizing your context path at all, suggests something wrong with resteasy configuration, but in JBoss AS there isn't anything user configures. So, it is leading me to may be platform differences.

Teiid OData Servlet throws java.lang.NullPointerException on every GET ---------------------------------------------------------------------- Key: TEIID-2656 URL: https://issues.jboss.org/browse/TEIID-2656 Project: Teiid Issue Type: Bug Affects Versions: 8.3, 8.4 Environment: Windows 7 64 bit Oracle JDK 1.7.0 update 17 JBoss AS 7.1.1 + Teiid 8.3 (both resteasy-jaxrs 2.3.5 and 2.3.7) JBoss EAP 6.1 + Teiid 8.4 (resteasy-jaxrs 2.3.6) Reporter: John Muller Assignee: Steven Hawkins Attachments: server.log A simple GET on any Teiid 8.3 or 8.4 OData ReST resource results in a Null Pointer: 11:43:20,166 ERROR [org.apache.catalina.core.ContainerBase.[jboss.web].[default-host].[/odata].[Resteasy]] (http-localhost-127.0.0.1-8080-2) Servlet.service() for servlet Resteasy threw exception: java.lang.NullPointerException at com.ctc.wstx.sw.BaseStreamWriter.writeCharacters(BaseStreamWriter.java:447) at org.codehaus.stax2.ri.Stax2EventWriterImpl.add(Stax2EventWriterImpl.java:124) at org.odata4j.stax2.staximpl.StaxXMLWriter2.writeText(StaxXMLWriter2.java:108) [odata4j-core-0.8.0-SNAPSHOT-redhat.jar:] at org.odata4j.format.xml.AtomErrorFormatWriter.writeError(AtomErrorFormatWriter.java:31) [odata4j-core-0.8.0-SNAPSHOT-redhat.jar:] at org.odata4j.format.xml.AtomErrorFormatWriter.write(AtomErrorFormatWriter.java:20) [odata4j-core-0.8.0-SNAPSHOT-redhat.jar:] at org.odata4j.format.xml.AtomErrorFormatWriter.write(AtomErrorFormatWriter.java:15) [odata4j-core-0.8.0-SNAPSHOT-redhat.jar:] at org.teiid.odata.ODataExceptionMappingProvider.toResponse(ODataExceptionMappingProvider.java:55) [classes:] at org.teiid.odata.ODataExceptionMappingProvider.toResponse(ODataExceptionMappingProvider.java:42) [classes:] at org.jboss.resteasy.core.SynchronousDispatcher.executeExceptionMapper(SynchronousDispatcher.java:344) [resteasy-jaxrs-2.3.7.Final.jar:] at org.jboss.resteasy.core.SynchronousDispatcher.unwrapException(SynchronousDispatcher.java:373) [resteasy-jaxrs-2.3.7.Final.jar:] at org.jboss.resteasy.core.SynchronousDispatcher.handleApplicationException(SynchronousDispatcher.java:362) [resteasy-jaxrs-2.3.7.Final.jar:] at org.jboss.resteasy.core.SynchronousDispatcher.handleException(SynchronousDispatcher.java:233) [resteasy-jaxrs-2.3.7.Final.jar:] at org.jboss.resteasy.core.SynchronousDispatcher.handleInvokerException(SynchronousDispatcher.java:209) [resteasy-jaxrs-2.3.7.Final.jar:] at org.jboss.resteasy.core.SynchronousDispatcher.getResponse(SynchronousDispatcher.java:557) [resteasy-jaxrs-2.3.7.Final.jar:] at org.jboss.resteasy.core.SynchronousDispatcher.invoke(SynchronousDispatcher.java:524) [resteasy-jaxrs-2.3.7.Final.jar:] at org.jboss.resteasy.core.SynchronousDispatcher.invoke(SynchronousDispatcher.java:126) [resteasy-jaxrs-2.3.7.Final.jar:] at org.teiid.odata.ODataServletContainerDispatcher.service(ODataServletContainerDispatcher.java:97) [classes:] at org.teiid.odata.ODataServlet.service(ODataServlet.java:61) [classes:] at org.jboss.resteasy.plugins.server.servlet.HttpServletDispatcher.service(HttpServletDispatcher.java:50) [resteasy-jaxrs-2.3.7.Final.jar:] at javax.servlet.http.HttpServlet.service(HttpServlet.java:847) [jboss-servlet-api_3.0_spec-1.0.0.Final.jar:1.0.0.Final] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:329) [jbossweb-7.0.13.Final.jar:] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:248) [jbossweb-7.0.13.Final.jar:] at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:275) [jbossweb-7.0.13.Final.jar:] at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:161) [jbossweb-7.0.13.Final.jar:] at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:489) [jbossweb-7.0.13.Final.jar:] at org.jboss.as.web.security.SecurityContextAssociationValve.invoke(SecurityContextAssociationValve.java:153) [jboss-as-web-7.1.1.Final.jar:7.1.1.Final] at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:155) [jbossweb-7.0.13.Final.jar:] at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102) [jbossweb-7.0.13.Final.jar:] at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109) [jbossweb-7.0.13.Final.jar:] at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:368) [jbossweb-7.0.13.Final.jar:] at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:877) [jbossweb-7.0.13.Final.jar:] at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:671) [jbossweb-7.0.13.Final.jar:] at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:930) [jbossweb-7.0.13.Final.jar:] at java.lang.Thread.run(Unknown Source) [rt.jar:1.7.0_17]