NullPointerException when files are not readable

[liar666]

Hi,

I just ran into a strange behaviour: when trying to access files in a dir (/tmp/ToTreat) that all belonged to another user, I ran into a not-really-explicatory-error: NullPointerException...

$ GROBID_HOME=/home/xxx/grobid/grobid-home/
$ DIR=/tmp/ToTreat/
$ java -Xmx1024m -Xms1024m
-jar ${GROBID_HOME}/../grobid-core/target/grobid-core-0.2.*.one-jar.jar
-gH ${GROBID_HOME}
-gP ${GROBID_HOME}/config/grobid.properties
-dIn ${DIR} -dOut ${DIR}
-exe processHeader
Exception in thread "main" 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:601)
at com.simontuffs.onejar.Boot.run(Boot.java:340)
at com.simontuffs.onejar.Boot.main(Boot.java:166)
Caused by: 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:601)
at org.grobid.core.utilities.Utilities.launchMethod(Utilities.java:359)
at org.grobid.core.main.batch.GrobidMain.main(GrobidMain.java:155)
... 6 more
Caused by: java.lang.NullPointerException
at org.grobid.core.engines.ProcessEngine.processHeader(ProcessEngine.java:56)
... 12 more

[lfoppiano]

Seems to work fine when the directory is not accssible:

Oct 17, 2018 3:58:49 PM org.grobid.core.engines.ProcessEngine processHeader
WARNING: No files in directory: /tmp/bao

On the other hand I've found that if the -exe method is supplied we have a NPE and I've pushed a fix.

[lfoppiano]

Closing as outdated ;-)