Hi Austin, I believe that the problem is the processing time window. Unlike for event time where we send a MAX_WATERMARK at the end of the stream to trigger all remaining windows, this does not happen for processing time windows. Hence, if your stream ends and you still have an open processing time window, then it will never get triggered.
The problem should disappear if you use event time or if you process unbounded streams which never end. Cheers, Till On Thu, Oct 1, 2020 at 12:01 AM Austin Cawley-Edwards < austin.caw...@gmail.com> wrote: > Hey all, > > Thanks for your patience. I've got a small repo that reproduces the issue > here: https://github.com/austince/flink-1.10-sql-windowing-error > > Not sure what I'm doing wrong but it feels silly. > > Thanks so much! > Austin > > On Tue, Sep 29, 2020 at 3:48 PM Austin Cawley-Edwards < > austin.caw...@gmail.com> wrote: > >> Hey Till, >> >> Thanks for the reply -- I'll try to see if I can reproduce this in a >> small repo and share it with you. >> >> Best, >> Austin >> >> On Tue, Sep 29, 2020 at 3:58 AM Till Rohrmann <trohrm...@apache.org> >> wrote: >> >>> Hi Austin, >>> >>> could you share with us the exact job you are running (including the >>> custom window trigger)? This would help us to better understand your >>> problem. >>> >>> I am also pulling in Klou and Timo who might help with the windowing >>> logic and the Table to DataStream conversion. >>> >>> Cheers, >>> Till >>> >>> On Mon, Sep 28, 2020 at 11:49 PM Austin Cawley-Edwards < >>> austin.caw...@gmail.com> wrote: >>> >>>> Hey all, >>>> >>>> I'm not sure if I've missed something in the docs, but I'm having a bit >>>> of trouble with a streaming SQL job that starts w/ raw SQL queries and then >>>> transitions to a more traditional streaming job. I'm on Flink 1.10 using >>>> the Blink planner, running locally with no checkpointing. >>>> >>>> The job looks roughly like: >>>> >>>> CSV 1 --> >>>> CSV 2 --> SQL Query to Join --> toRetractStream --> keyed time window >>>> w/ process func & custom trigger --> some other ops >>>> CSV 3 --> >>>> >>>> >>>> When I remove the windowing directly after the `toRetractStream`, the >>>> records make it to the "some other ops" stage, but with the windowing, >>>> those operations are sometimes not sent any data. I can also get data sent >>>> to the downstream operators by putting in a no-op map before the window and >>>> placing some breakpoints in there to manually slow down processing. >>>> >>>> >>>> The logs don't seem to indicate anything went wrong and generally look >>>> like: >>>> >>>> 4819 [Source: Custom File source (1/1)] INFO >>>> org.apache.flink.runtime.taskmanager.Task - Source: Custom File source >>>> (1/1) (3578629787c777320d9ab030c004abd4) switched from RUNNING to >>>> FINISHED.\4819 [Source: Custom File source (1/1)] INFO >>>> org.apache.flink.runtime.taskmanager.Task - Freeing task resources for >>>> Source: Custom File source (1/1) (3578629787c777320d9ab030c004abd4). >>>> 4819 [Source: Custom File source (1/1)] INFO >>>> org.apache.flink.runtime.taskmanager.Task - Ensuring all FileSystem >>>> streams are closed for task Source: Custom File source (1/1) >>>> (3578629787c777320d9ab030c004abd4) [FINISHED] >>>> 4820 [flink-akka.actor.default-dispatcher-5] INFO >>>> org.apache.flink.runtime.taskexecutor.TaskExecutor - Un-registering task >>>> and sending final execution state FINISHED to JobManager for task Source: >>>> Custom File source (1/1) 3578629787c777320d9ab030c004abd4. >>>> ... >>>> 4996 [Window(TumblingProcessingTimeWindows(60000), TimedCountTrigger, >>>> ProcessWindowFunction$1) (1/1)] INFO >>>> org.apache.flink.runtime.taskmanager.Task - >>>> Window(TumblingProcessingTimeWindows(60000), TimedCountTrigger, >>>> ProcessWindowFunction$1) (1/1) (907acf9bfa2f4a9bbd13997b8b34d91f) switched >>>> from RUNNING to FINISHED. >>>> 4996 [Window(TumblingProcessingTimeWindows(60000), TimedCountTrigger, >>>> ProcessWindowFunction$1) (1/1)] INFO >>>> org.apache.flink.runtime.taskmanager.Task - Freeing task resources for >>>> Window(TumblingProcessingTimeWindows(60000), TimedCountTrigger, >>>> ProcessWindowFunction$1) (1/1) (907acf9bfa2f4a9bbd13997b8b34d91f). >>>> 4996 [Window(TumblingProcessingTimeWindows(60000), TimedCountTrigger, >>>> ProcessWindowFunction$1) (1/1)] INFO >>>> org.apache.flink.runtime.taskmanager.Task - Ensuring all FileSystem >>>> streams are closed for task Window(TumblingProcessingTimeWindows(60000), >>>> TimedCountTrigger, ProcessWindowFunction$1) (1/1) >>>> (907acf9bfa2f4a9bbd13997b8b34d91f) [FINISHED] >>>> ... >>>> rest of the shutdown >>>> ... >>>> Program execution finished >>>> Job with JobID 889b161e432c0e69a8d760bbed205d5d has finished. >>>> Job Runtime: 783 ms >>>> >>>> >>>> Is there something I'm missing in my setup? Could it be my custom >>>> window trigger? Bug? I'm stumped. >>>> >>>> >>>> Thanks, >>>> Austin >>>> >>>> >>>>
