RDBMS to MongoDB using Talend 6.1.2 throwing error - mongodb

Question

I am trying to convert data from ORacle to MongoDB JSON format . But when trying to convert, I am getting following error when writing to JSON field. can anyone help. I have attached the flow and the mapping
Error message
tarting job ora2mongo at 03:14 17/08/2018.
[statistics] connecting to socket on port 4071
[statistics] connected
Exception in thread "main" java.lang.Error: Unresolved compilation problems:
Incorrect number of arguments for type Queue<E>; it cannot be parameterized with arguments <>
Syntax error on token "null", delete this token
Syntax error on token "null", delete this token
Syntax error on token "null", delete this token
queue cannot be resolved or is not a field
queue cannot be resolved to a variable
queue cannot be resolved or is not a field
queue cannot be resolved to a variable
Syntax error, insert "AssignmentOperator Expression" to complete Assignment
Syntax error, insert ";" to complete Statement
The left-hand side of an assignment must be a variable
Syntax error on token "null", invalid ClassType
Syntax error, insert "new ClassType ( )" to complete Expression
Syntax error, insert "AssignmentOperator Expression" to complete Assignment
Syntax error, insert ";" to complete Statement
Syntax error on token "null", invalid ClassType
Syntax error, insert "new ClassType ( )" to complete Expression
at rdbms_to_mongo.ora2mongo_0_1.ora2mongo.tOracleInput_1Process(ora2mongo.java:3156)
[statistics] disconnected
at rdbms_to_mongo.ora2mongo_0_1.ora2mongo.tOracleConnection_1Process(ora2mongo.java:550)
at rdbms_to_mongo.ora2mongo_0_1.ora2mongo.runJobInTOS(ora2mongo.java:5272)
at rdbms_to_mongo.ora2mongo_0_1.ora2mongo.main(ora2mongo.java:5129)
Job ora2mongo ended at 03:14 17/08/2018. [exit code=0]