Stanford CORENLP Master Keep Crashing (NullPointerException) - nlp

Question

I downloaded the latest version of Stanford CoreNLP with the larger english model from this link
Placing the model downloaded in the same project folder, i am using "ant" / "ant jar" to build the project.
I then load the server using this command on windows:
java -d64 -mx20g -classpath "*;lib\*;liblocal\*;libsrc\*" edu.stanford.nlp.pipeline.StanfordCoreNLPServer -timeout 500000
Loading the result page from http://localhost:9000 , the server crashes when using filters such as relations, coreference.
I get the error:
java.util.concurrent.ExecutionException: java.lang.NullPointerException
The log from server:
Some annotation fail such as:
[pool-1-thread-1] INFO edu.stanford.nlp.pipeline.MentionAnnotator - Error with building coref mention annotator!
And the main problem / exception:
java.util.concurrent.ExecutionException: java.lang.NullPointerException
at java.util.concurrent.FutureTask.report(Unknown Source)
at java.util.concurrent.FutureTask.get(Unknown Source)
at edu.stanford.nlp.pipeline.StanfordCoreNLPServer$CoreNLPHandler.handle(StanfordCoreNLPServer.java:497)
at com.sun.net.httpserver.Filter$Chain.doFilter(Unknown Source)
at sun.net.httpserver.AuthFilter.doFilter(Unknown Source)
at com.sun.net.httpserver.Filter$Chain.doFilter(Unknown Source)
at sun.net.httpserver.ServerImpl$Exchange$LinkHandler.handle(Unknown Source)
at com.sun.net.httpserver.Filter$Chain.doFilter(Unknown Source)
at sun.net.httpserver.ServerImpl$Exchange.run(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
Caused by: java.lang.NullPointerException
at edu.stanford.nlp.pipeline.MentionAnnotator.annotate(MentionAnnotator.java:100)
at edu.stanford.nlp.pipeline.AnnotationPipeline.annotate(AnnotationPipeline.java:75)
at edu.stanford.nlp.pipeline.StanfordCoreNLP.annotate(StanfordCoreNLP.java:606)
at edu.stanford.nlp.pipeline.StanfordCoreNLPServer$CoreNLPHandler.lambda$handle$344(StanfordCoreNLPServer.java:479)
at java.util.concurrent.FutureTask.run(Unknown Source)
... 3 more
Any help on what could be causing this would be much appreciated.
Thanks

Answer 1

What are you feeding to the library? I used to run coreNLP library in IntelliJ and Netbeans and I had an issue where if I fed a blank space (either one or more spaces, a tab or an empty blank line) I would get a null pointer exception. I had to check every sentence so they wouldn't be blank when feeding it to the coreNLP library. (I was storing each sentence as a String in a Array, so if I stored a blank string in the array and passed it to the CoreNLP library it would crash). I don't know if its your case but hope this helps.