README.md

ruta3-markfast-pear-bug

This is a sample project to reproduce a likely bug with Ruta 3 MARKFAST/TABLE in a PEAR context.

EDIT: The problem comes from uimaj-core, not Ruta. More info here: https://issues.apache.org/jira/browse/UIMA-6367

Description

When running an AAE in a PEAR context, if the first Ruta script after the CAS creation containts a MARKFAST (same for MARKTABLE), that action doesn't work.

The problem seems to be coming from the method RutaStream#moveToFirst when it's called from TreeWordList.find; in that case, the underlying iterator is not properly reset.

Steps to reproduce the problem

# 1) Generate the pear in target/ruta3-markfast-pear-bug-0.1.0-SNAPSHOT.pear
mvn package

# 2) Install PEAR and run the AAE
cp=~/.m2/repository/org/apache/uima/uimaj-core/3.2.0/uimaj-core-3.2.0.jar
cp=$cp:~/.m2/repository/org/slf4j/slf4j-api/1.7.25/slf4j-api-1.7.25.jar
cp=$cp:~/.m2/repository/org/slf4j/slf4j-simple/1.7.25/slf4j-simple-1.7.25.jar
cp=$cp:target/ruta3-markfast-pear-bug-0.1.0-SNAPSHOT.jar
java -cp $cp ruta3.PearRunner target/ruta3-markfast-pear-bug-0.1.0-SNAPSHOT.pear

It outputs something like:

ERROR! No FooBar annotations!

Note: It was tested with AdoptOpenJDK 1.8.0_252 and Apache Maven 3.3.9.

Workaround to "fix" it

If other Ruta script (for instance, an empty one) runs before the script that has the MARKFAST, the problem goes away. To probe that:

• Uncomment the Dummy.ruta script in src/main/resources/FooBarPipeline.xml and try again (rebuild the pear and launch the PearRunner).

Now the MARKFAST works and the output is something like:

FooBar detected! foo
FooBar detected! bar