Hi Qi, I checked the JVM heap of the sink TM is low.
I tried to read flink source code to identify where is exact the error happen. I think the exception happened inside DataSinkTask.invoke() // work! while (!this.taskCanceled && ((record = input.next()) != null)) { numRecordsIn.inc(); format.writeRecord(record); } RemoteTransportException should be thrown from "input.next()" when InputGate tried to read data from the upstream. Is this really a problem for this sink TM? I'm a little bit confused. -- Sent from: http://apache-flink-user-mailing-list-archive.2336050.n4.nabble.com/