Patterns not recognized after executing EXEC action - uima

Question

I have a strange problem with Apache UIMA Ruta (2.6.1) that I don't understand. I made the following script to demonstrate the situation. I recognize some patterns in the input text and create patterns from it.
After execution of the EXEC action patterns based on combination of annotations are not recognized:
For the following script I tried to use input text "aaa bbb". PATTERN_A is recognized (created) but PATTERN_B not.
Single annotations are still recognized (AAA_2 is created).
I serialized to a XCAS (cas) object before and after the EXEC command, and both files are equal.
Note: the TableLookupAnalysisEngine use an empty ruta script in this example. If I add a custom annotation in the script it also work.
ENGINE TableLookupAnalysisEngine;
DECLARE AAA;
DECLARE AAA_1;
DECLARE AAA_2;
DECLARE BBB;
DECLARE PATTERN_A;
DECLARE PATTERN_B;
"aaa"{-> MARK(AAA)};
"bbb"{-> MARK(BBB)};
AAA{-> AAA_1};
(AAA BBB){-> PATTERN_A};
Document{-> CONFIGURE(TableLookupAnalysisEngine, "dictRemoveWS" = true),
EXEC(TableLookupAnalysisEngine, {AAA, BBB})};
AAA{-> AAA_2};
// Not recognized -> internal index numbers changed?
(AAA BBB){-> PATTERN_B};

Answer 1

We tried the same test in Eclipse Workbench and get the expected result. The pattern matching after the EXEC command still work.
Because the XML descriptor files used in our project and Eclipse Workbench where equal we looked into the engine execution code:
We changed the following statement to solve the problem.
From:
JCas jCas = CasCreationUtils.createCas(rutaEngine.getAnalysisEngineMetaData()).getJCas();
To:
JCas jCas = rutaEngine.newJCas();

Answer 2

You need to specify the relevant type for internal Ruta reindexing by adding them in a TypeList as a second argument. There is an example in the documentation:
ENGINE NamedEntities;
Document{->EXEC(NamedEntities, {Person, Location})};
In your example, you probably need to add {AAA, BBB}.
DISCLAIMER: I am a developer of UIMA Ruta: