Yeah. All messages are lost while the streaming job was down. On Tue, Aug 25, 2015 at 11:37 AM, Cody Koeninger <c...@koeninger.org> wrote:
> Are you actually losing messages then? > > On Tue, Aug 25, 2015 at 1:15 PM, Susan Zhang <suchenz...@gmail.com> wrote: > >> No; first batch only contains messages received after the second job >> starts (messages come in at a steady rate of about 400/second). >> >> On Tue, Aug 25, 2015 at 11:07 AM, Cody Koeninger <c...@koeninger.org> >> wrote: >> >>> Does the first batch after restart contain all the messages received >>> while the job was down? >>> >>> On Tue, Aug 25, 2015 at 12:53 PM, suchenzang <suchenz...@gmail.com> >>> wrote: >>> >>>> Hello, >>>> >>>> I'm using direct spark streaming (from kafka) with checkpointing, and >>>> everything works well until a restart. When I shut down (^C) the first >>>> streaming job, wait 1 minute, then re-submit, there is somehow a series >>>> of 0 >>>> event batches that get queued (corresponding to the 1 minute when the >>>> job >>>> was down). Eventually, the batches would resume processing, and I would >>>> see >>>> that each batch has roughly 2000 events. >>>> >>>> I see that at the beginning of the second launch, the checkpoint dirs >>>> are >>>> found and "loaded", according to console output. >>>> >>>> Is this expected behavior? It seems like I might've configured something >>>> incorrectly, since I would expect with checkpointing that the streaming >>>> job >>>> would resume from checkpoint and continue processing from there (without >>>> seeing 0 event batches corresponding to when the job was down). >>>> >>>> Also, if I were to wait > 10 minutes or so before re-launching, there >>>> would >>>> be so many 0 event batches that the job would hang. Is this merely >>>> something >>>> to be "waited out", or should I set up some restart behavior/make a >>>> config >>>> change to discard checkpointing if the elapsed time has been too long? >>>> >>>> Thanks! >>>> >>>> < >>>> http://apache-spark-user-list.1001560.n3.nabble.com/file/n24450/Screen_Shot_2015-08-25_at_10.png >>>> > >>>> >>>> >>>> >>>> -- >>>> View this message in context: >>>> http://apache-spark-user-list.1001560.n3.nabble.com/Spark-Streaming-Checkpointing-Restarts-with-0-Event-Batches-tp24450.html >>>> Sent from the Apache Spark User List mailing list archive at Nabble.com. >>>> >>>> --------------------------------------------------------------------- >>>> To unsubscribe, e-mail: user-unsubscr...@spark.apache.org >>>> For additional commands, e-mail: user-h...@spark.apache.org >>>> >>>> >>> >> >
