Error creating XML using in house REST server

[hunterhector]

I am running the in-house RESTful server.

Using dbpeidia spotlight 1.0.0 [1] and model 2016-10 [2].

The server can do annotation most of the time, but sometimes throws:

org.dbpedia.spotlight.exceptions.OutputException: Error creating XML output.Error creating XML output.org.dbpedia.spotlight.web.rest.OutputManager.makeXML(OutputManager.java:108)

One minimum test case to reproduce the error is:

curl http://localhost:2222/en/rest/annotate --data-urlencode "text=Crimean peninsula Black Sea" -H "Accept: application/json"

Interestingly, querying the public dbpedia end point is totally fine:

curl http://api.dbpedia-spotlight.org/en/annotate --data-urlencode "text=Crimean peninsula Black Sea" -H "Accept: application/json"

[1] http://downloads.dbpedia-spotlight.org/spotlight/dbpedia-spotlight-1.0.0.jar
[2] http://downloads.dbpedia-spotlight.org/2016-10/en/model/en.tar.gz

[sandroacoelho]

Hi @hunterhector ,

Just remove /en from your URL

E.g:

curl http://localhost:2222/rest/annotate --data-urlencode "text=Crimean peninsula Black Sea" -H "Accept: application/json"

Best,

[hunterhector]

In fact, that is not what I mean. The URL I am using is correct.

Since I started the server with:
java -jar dbpedia-spotlight-1.0.0.jar /data/hector/dbpedia/en http://localhost:2222/en/rest

And the link works with the following command:
curl http://localhost:2222/en/rest/annotate --data-urlencode "text=Crimean peninsula" -H "Accept: application/json"

But does not work with the following:
curl http://localhost:2222/en/rest/annotate --data-urlencode "text=Crimean peninsula Black Sea" -H "Accept: application/json"

Some of the stack trace:

org.dbpedia.spotlight.exceptions.OutputException: Error creating XML output.Error creating XML output.org.dbpedia.spotlight.web.rest.OutputManager.makeXML(OutputManager.java:108)
org.dbpedia.spotlight.web.rest.SpotlightInterface.getXML(SpotlightInterface.java:250)
org.dbpedia.spotlight.web.rest.SpotlightInterface.getJSON(SpotlightInterface.java:328)
org.dbpedia.spotlight.web.rest.resources.Annotate.getJSON(Annotate.java:172)
org.dbpedia.spotlight.web.rest.resources.Annotate.postJSON(Annotate.java:275)
sun.reflect.GeneratedMethodAccessor15.invoke(Unknown Source)
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)

It seems there is something funny happening in converting the output to XML here. However, both the test cases work for the public rest API, which is making me even confusing.

[sandroacoelho]

Spotlight ApplicationPath does not come from the command line parameter as declared here.

If you want to change the path with the current version, I advise you put it behind an Apache / Nginx

[hunterhector]

Hi, Sandro,

Thanks for the quick reply. However, I still find the problem not related to the application path.

I restarted the server as

java -jar dbpedia-spotlight-1.0.0.jar /data/hector/dbpedia/en http://localhost:2222/rest

And then I do the following query:

curl http://localhost:2222/rest/annotate --data-urlencode "text=Crimean peninsula Black Sea" -H "Accept: application/json"

, which gives me the same XML error, here is the full stack trace:

org.dbpedia.spotlight.exceptions.OutputException: Error creating XML output.Error creating XML output.org.dbpedia.spotlight.web.rest.OutputManager.makeXML(OutputManager.java:108)
org.dbpedia.spotlight.web.rest.SpotlightInterface.getXML(SpotlightInterface.java:250)
org.dbpedia.spotlight.web.rest.SpotlightInterface.getJSON(SpotlightInterface.java:328)
org.dbpedia.spotlight.web.rest.resources.Annotate.getJSON(Annotate.java:172)
org.dbpedia.spotlight.web.rest.resources.Annotate.postJSON(Annotate.java:275)
sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
java.lang.reflect.Method.invoke(Method.java:498)
com.sun.jersey.spi.container.JavaMethodInvokerFactory$1.invoke(JavaMethodInvokerFactory.java:60)
com.sun.jersey.server.impl.model.method.dispatch.AbstractResourceMethodDispatchProvider$ResponseOutInvoker._dispatch(AbstractResourceMethodDispatchProvider.java:205)
com.sun.jersey.server.impl.model.method.dispatch.ResourceJavaMethodDispatcher.dispatch(ResourceJavaMethodDispatcher.java:75)
com.sun.jersey.server.impl.uri.rules.HttpMethodRule.accept(HttpMethodRule.java:302)
com.sun.jersey.server.impl.uri.rules.ResourceClassRule.accept(ResourceClassRule.java:108)
com.sun.jersey.server.impl.uri.rules.RightHandPathRule.accept(RightHandPathRule.java:147)
com.sun.jersey.server.impl.uri.rules.RootResourceClassesRule.accept(RootResourceClassesRule.java:84)
com.sun.jersey.server.impl.application.WebApplicationImpl._handleRequest(WebApplicationImpl.java:1542)
com.sun.jersey.server.impl.application.WebApplicationImpl._handleRequest(WebApplicationImpl.java:1473)
com.sun.jersey.server.impl.application.WebApplicationImpl.handleRequest(WebApplicationImpl.java:1419)
com.sun.jersey.server.impl.application.WebApplicationImpl.handleRequest(WebApplicationImpl.java:1409)
com.sun.jersey.spi.container.servlet.WebComponent.service(WebComponent.java:409)
com.sun.jersey.spi.container.servlet.ServletContainer.service(ServletContainer.java:558)
com.sun.jersey.spi.container.servlet.ServletContainer.service(ServletContainer.java:733)
javax.servlet.http.HttpServlet.service(HttpServlet.java:820)
com.sun.grizzly.http.servlet.ServletAdapter$FilterChainImpl.doFilter(ServletAdapter.java:1059)
com.sun.grizzly.http.servlet.ServletAdapter$FilterChainImpl.invokeFilterChain(ServletAdapter.java:999)
com.sun.grizzly.http.servlet.ServletAdapter.doService(ServletAdapter.java:434)
com.sun.grizzly.http.servlet.ServletAdapter.service(ServletAdapter.java:379)
com.sun.grizzly.tcp.http11.GrizzlyAdapter.service(GrizzlyAdapter.java:179)
com.sun.grizzly.http.ProcessorTask.invokeAdapter(ProcessorTask.java:849)
com.sun.grizzly.http.ProcessorTask.doProcess(ProcessorTask.java:746)
com.sun.grizzly.http.ProcessorTask.process(ProcessorTask.java:1045)
com.sun.grizzly.http.DefaultProtocolFilter.execute(DefaultProtocolFilter.java:228)
com.sun.grizzly.DefaultProtocolChain.executeProtocolFilter(DefaultProtocolChain.java:137)
com.sun.grizzly.DefaultProtocolChain.execute(DefaultProtocolChain.java:104)
com.sun.grizzly.DefaultProtocolChain.execute(DefaultProtocolChain.java:90)
com.sun.grizzly.http.HttpProtocolChain.execute(HttpProtocolChain.java:79)
com.sun.grizzly.ProtocolChainContextTask.doCall(ProtocolChainContextTask.java:54)
com.sun.grizzly.SelectionKeyContextTask.call(SelectionKeyContextTask.java:59)
com.sun.grizzly.ContextTask.run(ContextTask.java:71)
com.sun.grizzly.util.AbstractThreadPool$Worker.doWork(AbstractThreadPool.java:532)
com.sun.grizzly.util.AbstractThreadPool$Worker.run(AbstractThreadPool.java:513)
java.lang.Thread.run(Thread.java:748)

Note that, the following query is fine (no matter which application path I am using):

curl http://localhost:2222/rest/annotate --data-urlencode "text=Crimean peninsula" -H "Accept: application/json"

[annishaa88]

I'm also experiencing this issue with query: Mediterranean Sea

[agill3]

Me too. Any hint since the last post?

[juhaszhenderson]

Getting this too, any word on this?