a full config or operational yang-ext:mount on a device with lots of modules/submodules is failing. It seems that the issue is in submodules.

Logs attached.

smaller chunks of the config/operational tree work fine.

in the config case I see logs on the CLI which get dropped from the logfile:

2014-09-03 19:52:59 BST [org.apache.catalina.core.ContainerBase.[Catalina].[localhost].[/restconf].[JAXRSRestconf]] SEVERE org.apache.catalina.core.StandardWrapperValve invoke Servlet.service() for servlet [JAXRSRestconf] in context with path [/restconf] threw exception
java.lang.NullPointerException
at org.opendaylight.yangtools.yang.data.impl.codec.SchemaTracker.<init>(SchemaTracker.java:53)
at org.opendaylight.yangtools.yang.data.impl.codec.SchemaTracker.create(SchemaTracker.java:82)
at org.opendaylight.yangtools.yang.data.impl.codec.xml.XMLStreamNormalizedNodeStreamWriter.<init>(XMLStreamNormalizedNodeStreamWriter.java:48)
at org.opendaylight.yangtools.yang.data.impl.codec.xml.XMLStreamNormalizedNodeStreamWriter.create(XMLStreamNormalizedNodeStreamWriter.java:73)
at org.opendaylight.controller.sal.rest.impl.NormalizedNodeXmlBodyWriter.writeTo(NormalizedNodeXmlBodyWriter.java:87)
at org.opendaylight.controller.sal.rest.impl.NormalizedNodeXmlBodyWriter.writeTo(NormalizedNodeXmlBodyWriter.java:38)
at com.sun.jersey.spi.container.ContainerResponse.write(ContainerResponse.java:306)
at com.sun.jersey.server.impl.application.WebApplicationImpl._handleRequest(WebApplicationImpl.java:1479)
at com.sun.jersey.server.impl.application.WebApplicationImpl.handleRequest(WebApplicationImpl.java:1391)
at com.sun.jersey.server.impl.application.WebApplicationImpl.handleRequest(WebApplicationImpl.java:1381)
at com.sun.jersey.spi.container.servlet.WebComponent.service(WebComponent.java:416)
at com.sun.jersey.spi.container.servlet.ServletContainer.service(ServletContainer.java:538)
at com.sun.jersey.spi.container.servlet.ServletContainer.service(ServletContainer.java:716)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:848)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:222)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:123)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:581)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:168)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:99)
at org.opendaylight.controller.filtervalve.cors.FilterValve$1.doFilter(FilterValve.java:53)
at org.apache.catalina.filters.CorsFilter.handleNonCORS(CorsFilter.java:440)
at org.apache.catalina.filters.CorsFilter.doFilter(CorsFilter.java:179)
at org.opendaylight.controller.filtervalve.cors.model.FilterProcessor$1.doFilter(FilterProcessor.java:61)
at org.opendaylight.controller.filtervalve.cors.model.FilterProcessor.process(FilterProcessor.java:66)
at org.opendaylight.controller.filtervalve.cors.FilterValve.invoke(FilterValve.java:56)
at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:929)
at org.apache.catalina.authenticator.SingleSignOn.invoke(SingleSignOn.java:309)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:407)
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1002)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:585)
at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:312)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
at java.lang.Thread.run(Thread.java:744)

this one also gives an HTTP500:

type Exception report

message

description The server encountered an internal error that prevented it from fulfilling this request.

exception

java.lang.NullPointerException
org.opendaylight.yangtools.yang.data.impl.codec.SchemaTracker.<init>(SchemaTracker.java:53)
org.opendaylight.yangtools.yang.data.impl.codec.SchemaTracker.create(SchemaTracker.java:82)
org.opendaylight.yangtools.yang.data.impl.codec.xml.XMLStreamNormalizedNodeStreamWriter.<init>(XMLStreamNormalizedNodeStreamWriter.java:48)
org.opendaylight.yangtools.yang.data.impl.codec.xml.XMLStreamNormalizedNodeStreamWriter.create(XMLStreamNormalizedNodeStreamWriter.java:73)
org.opendaylight.controller.sal.rest.impl.NormalizedNodeXmlBodyWriter.writeTo(NormalizedNodeXmlBodyWriter.java:87)
org.opendaylight.controller.sal.rest.impl.NormalizedNodeXmlBodyWriter.writeTo(NormalizedNodeXmlBodyWriter.java:38)
com.sun.jersey.spi.container.ContainerResponse.write(ContainerResponse.java:306)
com.sun.jersey.server.impl.application.WebApplicationImpl._handleRequest(WebApplicationImpl.java:1479)
com.sun.jersey.server.impl.application.WebApplicationImpl.handleRequest(WebApplicationImpl.java:1391)
com.sun.jersey.server.impl.application.WebApplicationImpl.handleRequest(WebApplicationImpl.java:1381)
com.sun.jersey.spi.container.servlet.WebComponent.service(WebComponent.java:416)
com.sun.jersey.spi.container.servlet.ServletContainer.service(ServletContainer.java:538)
com.sun.jersey.spi.container.servlet.ServletContainer.service(ServletContainer.java:716)
javax.servlet.http.HttpServlet.service(HttpServlet.java:848)

note The full stack trace of the root cause is available in the Apache Tomcat/7.0.32 logs.