Github user kl0u commented on the issue:
https://github.com/apache/flink/pull/2546
Hi @StephanEwen . If I understand correctly, your suggestion is to make the
test something like the following: 1) put the split in the reader 2) read the
split 3) when the split finishes update the time in the provider 4) observe the
time in the output elements. If this is the case, then the problem is that the
reader just puts the split in a queue, and this is picked up by another thread
that reads it. In this context, there is no way of knowing when the reading
thread has finished reading the split and goes to the next one. So step 3)
cannot be synchronized correctly. This is the reason I am just having a thread
in the test that tries (without guarantees - the race condition you mentioned)
to update the time while the reader is still reading. Any suggestions are
welcome.
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