Is the poll() method of kafka SourceTask class thread safe? -


i'm using kafka connect send data web service kafka (version 0.10.1) in distributed mode. poll() method documentation states that:

poll sourcetask new records. method should block if no data available.

however, i'm not sure if poll() method can called more 1 thread kafka. requests web service time-consuming, done in method , want avoid sending them multiple times.

there question states prior version 0.10.2.1-cp2, poll() method called different threads. however, release notes can't confirm if situation doesn't happen on newer versions.

kafka connect tasks not need threadsafe perspective of framework, , tasks should not assume can communicate other tasks , connectors via static mechanisms. note of course there may multiple tasks running in separate threads.

at least kafka 0.11.0.0, methods on each sourcetask , sinktask instance called thread dedicated task. same thread used lifetime of task instance until stopped. when task paused, thread blocks.

my understanding behavior ever since @ least 0.10.1.0, you'd have check codebase sure.


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