TaskContextNotFoundException using dkpro lab

[Pedro Santos]

Hi,

I am trying to run a pipeline using dkpro lab 0.11 in groovy, and unfortunately I getting a TaskContextNotFoundException.

I extend a BatchTask, and initialize it by the following way:

       if ((experimentName == null) || (preprocessingPipeline == null))

        {

            throw new IllegalStateException(

                    "You must set Experiment Name, DataWriter and Preprocessing pipeline.");

        }

        // check the validity of the experiment setup first

        checkTask = new ValidityCheckTask();

        // preprocessing on training data

        preprocessTask = new PreprocessTask();

        preprocessTask.setPreprocessingPipeline(preprocessingPipeline);

        preprocessTask.setTesting(false);

        preprocessTask.setType(preprocessTask.getType() + "-" + experimentName);

        // get some meta data depending on the whole document collection that we need for training

        metaTask = new MetaInfoTask();

        metaTask.setType(metaTask.getType() + "-" + experimentName);

        metaTask.addImport(preprocessTask, PreprocessTask.OUTPUT_KEY_TRAIN,

                MetaInfoTask.INPUT_KEY);

        // feature extraction on training data

        featuresTask = new ExtractFeaturesTask();

        featuresTask.setType(featuresTask.getType() + "-" + experimentName);

        featuresTask.addImport(metaTask, MetaInfoTask.META_KEY);

        featuresTask.addImport(preprocessTask, PreprocessTask.OUTPUT_KEY_TRAIN,

                ExtractFeaturesTask.INPUT_KEY);

        // test task operating on the models of the feature extraction train and test tasks

        clusteringTask = new ClusteringTask();

        clusteringTask.setType(clusteringTask.getType() + "-" + experimentName);

        if (innerReports != null) {

            for (Class<? extends Report> report : innerReports) {

            clusteringTask.addReport(report);

            }

        }

        clusteringTask.addImport(featuresTask, ExtractFeaturesTask.OUTPUT_KEY,

                ClusteringTask.CLUSTERING_TASK_INPUT_KEY);

        // DKPro Lab issue 38: must be added as *first* task

        addTask(checkTask);

        addTask(preprocessTask);

        addTask(metaTask);

        addTask(featuresTask);

        addTask(clusteringTask);

However, even though the preprocessing task is executed without any error, looks like the tasks which should import it, metaTask and featuresTaks, cannot find it. This is the stackTrace of the exception thrown:

Exception in thread "main" de.tudarmstadt.ukp.dkpro.lab.storage.UnresolvedImportException: 

 -Unable to resolve import of task [de.tudarmstadt.ukp.dkpro.tc.core.task.MetaInfoTask-20NewsGroupsClustering-Groovy] pointing to [task-latest://de.tudarmstadt.ukp.dkpro.tc.core.task.PreprocessTask-20NewsGroupsClustering-Groovy/preprocessorOutputTrain]; nested exception is de.tudarmstadt.ukp.dkpro.lab.storage.TaskContextNotFoundException: Task [de.tudarmstadt.ukp.dkpro.tc.core.task.PreprocessTask-20NewsGroupsClustering-Groovy] has never been executed.

 -Unable to resolve import of task [de.tudarmstadt.ukp.dkpro.tc.core.task.ExtractFeaturesTask-20NewsGroupsClustering-Groovy] pointing to [task-latest://de.tudarmstadt.ukp.dkpro.tc.core.task.PreprocessTask-20NewsGroupsClustering-Groovy/preprocessorOutputTrain]; nested exception is de.tudarmstadt.ukp.dkpro.lab.storage.TaskContextNotFoundException: Task [de.tudarmstadt.ukp.dkpro.tc.core.task.PreprocessTask-20NewsGroupsClustering-Groovy] has never been executed.

 -Unable to resolve import of task [de.tudarmstadt.ukp.dkpro.tc.experiments.usefulcomments.tasks.ClusteringTask-20NewsGroupsClustering-Groovy] pointing to [task-latest://de.tudarmstadt.ukp.dkpro.tc.core.task.ExtractFeaturesTask-20NewsGroupsClustering-Groovy/output]; nested exception is de.tudarmstadt.ukp.dkpro.lab.storage.TaskContextNotFoundException: Task [de.tudarmstadt.ukp.dkpro.tc.core.task.ExtractFeaturesTask-20NewsGroupsClustering-Groovy] has never been executed.; nested exception is de.tudarmstadt.ukp.dkpro.lab.storage.UnresolvedImportException: Unable to resolve import of task [de.tudarmstadt.ukp.dkpro.tc.core.task.MetaInfoTask-20NewsGroupsClustering-Groovy] pointing to [task-latest://de.tudarmstadt.ukp.dkpro.tc.core.task.PreprocessTask-20NewsGroupsClustering-Groovy/preprocessorOutputTrain]; nested exception is de.tudarmstadt.ukp.dkpro.lab.storage.TaskContextNotFoundException: Task [de.tudarmstadt.ukp.dkpro.tc.core.task.PreprocessTask-20NewsGroupsClustering-Groovy] has never been executed.

at de.tudarmstadt.ukp.dkpro.lab.task.impl.BatchTask.executeConfiguration(BatchTask.java:282)

at de.tudarmstadt.ukp.dkpro.lab.task.impl.BatchTask.execute(BatchTask.java:185)

at de.tudarmstadt.ukp.dkpro.tc.experiments.usefulcomments.tasks.BatchTaskClustering.execute(BatchTaskClustering.java:78)

at de.tudarmstadt.ukp.dkpro.lab.engine.impl.ExecutableTaskEngine.run(ExecutableTaskEngine.java:55)

at de.tudarmstadt.ukp.dkpro.lab.engine.impl.DefaultTaskExecutionService.run(DefaultTaskExecutionService.java:48)

at de.tudarmstadt.ukp.dkpro.lab.Lab.run(Lab.java:97)

at de.tudarmstadt.ukp.dkpro.lab.Lab$run.call(Unknown Source)

at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCall(CallSiteArray.java:45)

at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:108)

at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:116)

at de.tudarmstadt.ukp.dkpro.tc.experiments.usefulcomments.scripts.ClusteringPipeline.main(ClusteringPipeline.groovy:98)

Caused by: de.tudarmstadt.ukp.dkpro.lab.storage.UnresolvedImportException: Unable to resolve import of task [de.tudarmstadt.ukp.dkpro.tc.core.task.MetaInfoTask-20NewsGroupsClustering-Groovy] pointing to [task-latest://de.tudarmstadt.ukp.dkpro.tc.core.task.PreprocessTask-20NewsGroupsClustering-Groovy/preprocessorOutputTrain]; nested exception is de.tudarmstadt.ukp.dkpro.lab.storage.TaskContextNotFoundException: Task [de.tudarmstadt.ukp.dkpro.tc.core.task.PreprocessTask-20NewsGroupsClustering-Groovy] has never been executed.

at de.tudarmstadt.ukp.dkpro.lab.task.impl.BatchTask$ScopedTaskContext.resolve(BatchTask.java:549)

at de.tudarmstadt.ukp.dkpro.lab.engine.impl.DefaultTaskContextFactory.resolveImports(DefaultTaskContextFactory.java:142)

at de.tudarmstadt.ukp.dkpro.lab.engine.impl.DefaultTaskContextFactory.createContext(DefaultTaskContextFactory.java:98)

at de.tudarmstadt.ukp.dkpro.lab.uima.engine.simple.SimpleExecutionEngine.run(SimpleExecutionEngine.java:80)

at de.tudarmstadt.ukp.dkpro.lab.task.impl.BatchTask.runNewExecution(BatchTask.java:350)

at de.tudarmstadt.ukp.dkpro.lab.task.impl.BatchTask.executeConfiguration(BatchTask.java:255)

... 10 more

Caused by: de.tudarmstadt.ukp.dkpro.lab.storage.TaskContextNotFoundException: Task [de.tudarmstadt.ukp.dkpro.tc.core.task.PreprocessTask-20NewsGroupsClustering-Groovy] has never been executed.

at de.tudarmstadt.ukp.dkpro.lab.engine.impl.ImportUtil.createContextNotFoundException(ImportUtil.java:125)

at de.tudarmstadt.ukp.dkpro.lab.task.impl.BatchTask.getLatestExecution(BatchTask.java:327)

at de.tudarmstadt.ukp.dkpro.lab.task.impl.BatchTask.access$000(BatchTask.java:70)

at de.tudarmstadt.ukp.dkpro.lab.task.impl.BatchTask$ScopedTaskContext.resolve(BatchTask.java:546)

... 15 more

If someone has a clue, I would be glad to hear. I might be missing something really stupid here.

Regards,

Pedro