Null correlation not allowed. Maybe the CorrelationStrategy is failing?

Question

I am using spring integration,and I am using default correlation strategy, that is i am not explicitly writing code for correlation strategy,everything works fine till the splitter, after the splitter there is a service activator which does some processing and then puts the message into a channel from which the aggregator has to pick it,but the aggregator doesnt pick it, so i put an interceptor to find out what was going on and found out that before the message is put into the aggregator channel, aggregation related headers like correlation id etc are present,but once its put into the channel the headers are lost.Now i am not sure why the aggregator or the channel before that is losing the headers.Any help would be much appreciated.

UPDATE:- i using an spliier then activator then another splitter then an activator then an aggregator and then another aggregator... The code below is for inner splitter and aggregator combination

Answer 1

Thanks for your help. I was able to finally solve this. The problem was i was passing along org.json.JSONOBject from and to the spring integration components. Now the JSONObject is not serialized, and i guess splitter and aggregator components only work with serialized objects. The simplest way was to conver the JSONObjects to string by calling toString() method on them.It would have been so much easier if the stack trace told me that i was using a non-serialized object instead of telling me "Null correlation not allowed. Maybe the CorrelationStrategy is failing?"

I have removed my code that i had put here to be safe.