FHIR model class types not resolved during runtime when using the cached R4 context

[ndegwamartin]

Describe the bug There's as a strange issue that occurs when using the workflow library to generate reports using CQL The classes org.hl7.fhir.r4.model.BundleType and SearchParameter$SearchComparator classes are not resolved by the FHIR Model Resolver because they are not present in the data structure here at run time.

An exception is thrown in the line here ../model/FhirModelResolver.java#L295

Component Workflow library

To Reproduce Steps to reproduce the behavior:

1. Go to '...'
2. Click on '....'
3. Scroll down to '....'
4. See error

Expected behavior All HAPI FHIR structure models should be loaded in the FhirModelResolver class and should not throw a missing class exception at runtime

Screenshots

Stacktrace

org.opencds.cqf.cql.engine.fhir.exception.UnknownType: Could not resolve type BundleType. Primary package(s) for this resolver are org.hl7.fhir.r4.model
                                                                                            at org.opencds.cqf.cql.engine.fhir.model.FhirModelResolver.resolveType(FhirModelResolver.java:295)
                                                                                            at org.opencds.cqf.cql.engine.fhir.model.R4FhirModelResolver.resolveType(R4FhirModelResolver.java:189)
                                                                                            at org.opencds.cqf.cql.evaluator.engine.model.CachingModelResolverDecorator.resolveType(CachingModelResolverDecorator.java:64)
                                                                                            at org.opencds.cqf.cql.engine.data.CompositeDataProvider.resolveType(CompositeDataProvider.java:54)
                                                                                            at org.opencds.cqf.cql.engine.execution.Context.resolveType(Context.java:457)
                                                                                            at org.opencds.cqf.cql.engine.execution.Context.resolveType(Context.java:462)
                                                                                            at org.opencds.cqf.cql.engine.execution.Context.resolveOperandType(Context.java:510)
                                                                                            at org.opencds.cqf.cql.engine.execution.Context.resolveFunctionRef(Context.java:564)
                                                                                            at org.opencds.cqf.cql.engine.execution.Context.resolveFunctionRef(Context.java:596)
                                                                                            at org.opencds.cqf.cql.engine.elm.execution.FunctionRefEvaluator.internalEvaluate(FunctionRefEvaluator.java:23)
                                                                                            at org.opencds.cqf.cql.engine.elm.execution.Executable.evaluate(Executable.java:14)
                                                                                            at org.opencds.cqf.cql.engine.elm.execution.FunctionRefEvaluator.internalEvaluate(FunctionRefEvaluator.java:17)
                                                                                            at org.opencds.cqf.cql.engine.elm.execution.Executable.evaluate(Executable.java:14)
                                                                                            at org.opencds.cqf.cql.engine.elm.execution.ExpressionDefEvaluator.internalEvaluate(ExpressionDefEvaluator.java:23)
                                                                                            at org.opencds.cqf.cql.engine.elm.execution.Executable.evaluate(Executable.java:14)

Smartphone (please complete the following information):

• Device: Pixel3XL emulator]
• Android version: 12
• API Version 31
• RAM 4GB, VM Heap 1 GB
• Storage: Internal Storage 6GB, SD Card(Studio Managed) 4 GB

Additional context

• Sometimes it works but sometime it doesn't, even on the same device
• There is no obvious pattern to the flakiness
• The current workaround is to swap the cached version with the non-cached version i.e. FhirContext.forR4Cached() vs FhirContext.forR4().
• So far, we have only observed this when generating reports in the Workflow library.
• So far, only the above two specified classes are missing/throw the exception i.e. BundleType and SearchParameter$SearchComparator

Would you like to work on the issue? Please state if this issue should be assigned to you or who you think could help to solve this issue.

[ndegwamartin]

Created the issue to track this cc @dubdabasoduba @f-odhiambo @roy @maimoonak @jingtang10 @khyativyasargus

[aditya-07]

@ktarasenko @vitorpamplona FYI.