kl0u edited a comment on issue #7036: [FLINK-10531][e2e] Fix unstable TTL 
end-to-end test.
URL: https://github.com/apache/flink/pull/7036#issuecomment-437051981
 
 
   Actually, now @StefanRRichter mentioned it, we have the `TtlTimeProvider` 
and the `ProcessingTimeService`. Both of them are used internally by Flink to 
let it know what is the "current" processing time, but each of them has its own 
implementation (which happens to be `currentTimeMillis` for both). 
   
   I think that these two should be unified and the `TtlTimeProvider` should 
call the `ProcessingTimeService::getCurrentProcessingTime()`. This will allow 
to have a "single point of truth".
   
   What do you think @StefanRRichter and @azagrebin 

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