Re: [Wikidata-l] Wikidata-Toolkit NullPointerException

OK, thanks! Please let me know if I can test anything on my system.

Egon On 17 Jan 2015 22:50, "Markus Krötzsch" markus@semantic-mediawiki.org wrote:

On 17.01.2015 22:43, Egon Willighagen wrote:

...

This last test from the cmd line is already with master from GitHub...

Thanks, we will investigate. I created a bug report at

https://github.com/Wikidata/Wikidata-Toolkit/issues/114

Markus

...

Egon

On 17 Jan 2015 22:40, "Markus Krötzsch" <markus@semantic-mediawiki.org mailto:markus@semantic-mediawiki.org> wrote:

Hi Egon,

WDTK 0.3.0 is rather old and we are about to prepare a new release
(there are other issues with 0.3.0: the JSON format has changed
since its release and it won't read the files anyway). Could you try
if the problem occurs with the current development code at github?

Cheers,

Markus

On 17.01.2015 16:59, Egon Willighagen wrote:

    Hi all,

    I have been trying today to get the Java library Wikidata-Toolkit
    going, but about to give up... I keep running with both 0.3.0 and
    current master into a NullPointerException... I thought it was

how I called the code, and did add several System.out calls, and in the end just tried to get it running from the command line... I tried the example from the website (though replaced the Dump examples, which I don't see in master; btw, "mvn test" runs fine) using a pristine master:

    $ cd wdtk-examples/
    $ mvn compile
    $ mvn exec:java
    -Dexec.mainClass="org.__wikidata.wdtk.examples.__

EntityStatisticsProcessor"

    In doing so, I get the same NPE:

    ******************************__****************************

**__******** *** Wikidata Toolkit: EntityStatisticsProcessor *** *** This program will download and process dumps from Wikidata. *** It will print progress information and some simple statistics. *** Results about property usage will be stored in a CSV file. *** See source code for further details. ******************************__**************************** **__******** 2015-01-17 16:53:00 INFO - Using download directory /home/egonw/var/Projects/__GitHub/Wikidata-Toolkit/wdtk-_ _examples/dumpfiles/__wikidatawiki [WARNING] java.lang.reflect.__InvocationTargetException at sun.reflect.__NativeMethodAccessorImpl.__invoke0(Native Method) at sun.reflect.__NativeMethodAccessorImpl.__invoke(__ NativeMethodAccessorImpl.java:__57) at sun.reflect.__DelegatingMethodAccessorImpl.__invoke(__ DelegatingMethodAccessorImpl.__java:43) at java.lang.reflect.Method.__invoke(Method.java:606) at org.codehaus.mojo.exec.__ExecJavaMojo$1.run(__ ExecJavaMojo.java:293) at java.lang.Thread.run(Thread.__java:745) Caused by: java.lang.NullPointerException at org.wikidata.wdtk.dumpfiles.__DumpProcessingController.__ processDumpFile(__DumpProcessingController.java:__470) at org.wikidata.wdtk.dumpfiles.__DumpProcessingController.__ processMostRecentDump(__DumpProcessingController.java:__456) at org.wikidata.wdtk.dumpfiles.__DumpProcessingController.__ processMostRecentJsonDump(__DumpProcessingController.java:__426) at org.wikidata.wdtk.examples.__ExampleHelpers.__ processEntitiesFromWikidataDum__p(ExampleHelpers.java:158) at org.wikidata.wdtk.examples.__EntityStatisticsProcessor.__main(__ EntityStatisticsProcessor.__java:88) ... 6 more

    I tried finding what goes wrong, but cannot grasp all the magic

that is going on... the directory it reports was created, but is empty...

    $ mvn --version
    Apache Maven 3.0.5
    Maven home: /usr/share/maven
    Java version: 1.7.0_65, vendor: Oracle Corporation
    Java home: /usr/lib/jvm/java-7-openjdk-__i386/jre
    Default locale: en_US, platform encoding: UTF-8
    OS name: "linux", version: "3.16.0-4-686-pae", arch: "i386",
    family: "unix"

    Can someone give me some pointers where and how it is testing of
    dump
    files exist? Is this problem something platform dependent?

    Thanks,

    Egon



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