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From David Fox <David....@humedica.com>
Subject NullPointerException when RunRemoteAsyncAE tries to unload (UIMA AS and UIMA C++)
Date Thu, 22 Sep 2016 14:54:11 GMT
I’m using the UIMA C++ framework 2.4.0 (32-bit) on linux (CentOS 6.5), and following the
instructions  https://uima.apache.org/d/uimacpp-2.4.0/docs/overview_and_setup.html.  I’ve
successfully built DaveDetector and run it with the standalone C++ pipeline (runAECpp) and
within a Java pipeline via JNI.  I’ve now installed UIMA AS 2.8.1 so I can follow the instructions
under 2.3 Testing Interoperability with UIMA AS

cd $UIMACPP_HOME/examples/tutorial
runRemoteAsyncAE.sh tcp://localhost:61616 MeetingAnnotator \
-d descriptors/Deploy_MeetingAnnotator.xml

I get a NullPointerException and a transport warning about a java.io.EOFException

runRemoteAsyncAE.sh tcp://localhost:61616 MeetingAnnotator -d descriptors/Deploy_MeetingAnnotator.xml
-o `pwd`/out

Attempting to deploy descriptors/Deploy_MeetingAnnotator.xml ...

Waiting for Uima C++ service to connect...

Waiting for Uima C++ service to connect...

Waiting for Uima C++ service to report init status...

deployCppService.cpp91 Start receiving messages

Startinging GetMetaData instance

Starting Annotator instance 0

deployCppService.cpp UIMA C++ Service MeetingAnnotator at tcp://localhost:61616 Ready to process...

Uima C++ service at MeetingAnnotator Ready to process...

UIMA AS Service Initialization Complete

.Completed 1 documents

Time Elapsed : 2184 ms


        at org.apache.uima.adapter.jms.client.BaseUIMAAsynchronousEngine_impl.undeploy(BaseUIMAAsynchronousEngine_impl.java:964)

        at org.apache.uima.adapter.jms.client.BaseUIMAAsynchronousEngine_impl.undeploy(BaseUIMAAsynchronousEngine_impl.java:906)

        at org.apache.uima.examples.as.RunRemoteAsyncAE.run(RunRemoteAsyncAE.java:260)

        at org.apache.uima.examples.as.RunRemoteAsyncAE.main(RunRemoteAsyncAE.java:314)

        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)

        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)

        at java.lang.reflect.Method.invoke(Method.java:497)

        at org.apache.uima.bootstrap.UimaBootstrap.main(UimaBootstrap.java:87)

WARN  Transport                      - Transport Connection to: tcp:// failed:

I can also run with a collection reader:

runRemoteAsyncAE.sh tcp://localhost:61616 MeetingAnnotator -d descriptors/Deploy_MeetingAnnotator.xml
-o `pwd`/out -c /misc/NLP/dfox/scratch/uima/apache-uima-as-2.8.1/examples/descriptors/collection_reader/FileSystemCollectionReader.mine.xml

(where the modified collection reader points to $UIMA_HOME/examples/data) in which case I
get “Completed 8 documents”, and xmi output for each in the out/ directory, but still
get the same exception and warning.  Based on that (plus looking at the RunRemoteAsyncAE java
source), it looks like my analysis engine is running fine, but then hitting some problem when
RunRemoteAsyncAE tries to undeploy the C++ annotator.

I’m trying to figure out if this is something I should worry about (especially if it reflects
a problem with running UIMA C++ 2.4 and UIMA AS 2.8.1), or if it is normal or harmless.

When I run the similar test with one of the Java-only UIMA AS samples:

runRemoteAsyncAE.sh tcp://localhost:61616 MeetingDetectorTaeQueue -d deploy/as/Deploy_MeetingDetectorTAE.xml
-c descriptors/collection_reader/FileSystemCollectionReader.mine.xml

I still get the transport warning

WARN  Transport                      - Transport Connection to: tcp:// failed:

but not the NullPointerException


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