Re: CasManager.defineCasPool() was called twice by the same Analysis Engine

[Jörn Kottmann]

Eddie Epstein wrote:
Hi Jörn,
From CVD I can repeatedly run aggregates containing cas mutiplier
delegates. Can you be more specific about the scenario? For example,
are you re-instantiating the AE between runs? Would it be easy for you
to make a minimal code sample that demonstrates the problem?
  
Here is my code which interacts with the PEAR Api. Maybe it differs a bit
from the usual use case, because I also instantiate a CollectionReader.
Errors occurs if this code is run twice.

BTW, is it safe it run it concurrently in multiple threads for different 
pears ?
In the case it failed it did not run concurrently, but it is possible
that is run the second time in a different thread.

I can try to make a minimal code sample, but maybe you see something
wrong in my interaction with UIMA.

Jörn
               PackageBrowser instPear = 
PackageInstaller.installPackage(...);

               ResourceManager rsrcMgr = UIMAFramework
                       .newDefaultResourceManager();
              
               InstallationDescriptor instDesc = 
instPear.getInstallationDescriptor();
              
               XMLInputSource in = new XMLInputSource(instPear
                       .getComponentPearDescPath());

               ResourceSpecifier specifier = UIMAFramework.getXMLParser()
                       .parseResourceSpecifier(in);

               AnalysisEngine ae = UIMAFramework.produceAnalysisEngine(
                       specifier, rsrcMgr, null);
              
               rsrcMgr = UIMAFramework.newDefaultResourceManager();
               
rsrcMgr.setExtensionClassPath(instPear.getComponentPearDescPath() + ":" 
+ instPear.buildComponentClassPath(), false);
              
               XMLInputSource collectionReaderIn = new XMLInputSource(
                       instDesc.getMainCollIteratorDesc());
              
               ResourceSpecifier colReaderSpecifier =
                       
UIMAFramework.getXMLParser().parseResourceSpecifier(collectionReaderIn);
              
               
Thread.currentThread().setContextClassLoader(rsrcMgr.getExtensionClassLoader());

               CollectionReader colReader =
                       
UIMAFramework.produceCollectionReader(colReaderSpecifier, rsrcMgr, null);
              
               colReader.typeSystemInit(ae.newCAS().getTypeSystem());
              
               CAS cas = ae.newCAS();
               while (colReader.hasNext()) {
                   colReader.getNext(cas);
                  
                   ae.process(cas);
                  
                   cas.reset();
               }
              
               isCompletingCollectionProcessing = true;
              
               ae.collectionProcessComplete();