NewTracker initializes a new instance of a tracker.

ApplyUDFErr represents any mapUDF related error.

GRPCBasedAlignedReduce is a reduce applier that uses gRPC client to invoke the aligned reduce UDF.

GRPCBasedBatchMap is a map applier that uses gRPC client to invoke the map UDF.

GRPCBasedMap is a map applier that uses gRPC client to invoke the map UDF.

GRPCBasedMapStream is a map stream applier that uses gRPC client to invoke the map stream UDF.

GRPCBasedUnalignedReduce is a reduce applier that uses gRPC client to invoke the session reduce UDF.

InternalErr represents errors internal to the platform.