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From Guozhang Wang <wangg...@gmail.com>
Subject Re: What makes a KStream app exit?
Date Thu, 05 Jan 2017 19:54:50 GMT
Re: "UnsupportedOperationException: null org.apache.kafka.streams.
processor.internals.StandbyContextImpl.recordCollector(
StandyContextImpl.java:81)": I think this is a known issue that has been
fixed in trunk:

https://github.com/apache/kafka/commit/a4592a18641f84a1983c5fe7e697a8
b0ab43eb25


Guozhang

On Fri, Dec 16, 2016 at 11:53 AM, Matthias J. Sax <matthias@confluent.io>
wrote:

> I guess. It's bugs, so always hard to be 100% sure.
>
> We know about a null-pointer bug in task assignment/creating -- so I
> assume it what you see.
>
> -Matthias
>
> On 12/16/16 11:19 AM, Jon Yeargers wrote:
> > And these bugs would cause the behaviors Im seeing?
> >
> > On Fri, Dec 16, 2016 at 10:45 AM, Matthias J. Sax <matthias@confluent.io
> >
> > wrote:
> >
> >> We just discovered a couple of bugs with regard to standby tasks... Not
> >> all bug fix PRs got merged yet.
> >>
> >> You can try running on trunk to get those fixes. Should only be a few
> >> days until the fixes get merged.
> >>
> >>
> >> -Matthias
> >>
> >> On 12/16/16 9:10 AM, Jon Yeargers wrote:
> >>> Have started having this issue with another KStream based app. Digging
> >>> through logs I ran across this message:
> >>>
> >>> When I've seen it before it certainly does kill the application. At the
> >> end
> >>> of the SNIP you can see the exit process starting.
> >>>
> >>>
> >>> 2016-12-16 17:04:51,507 [StreamThread-1] DEBUG
> >>> o.a.k.s.p.internals.StreamThread - stream-thread [StreamThread-1]
> >> creating
> >>> new standby task 0_0
> >>>
> >>> 2016-12-16 17:04:51,507 [StreamThread-1] INFO
> >>> o.a.k.s.p.internals.StreamThread - stream-thread [StreamThread-1]
> >> Creating
> >>> new standby task 0_0 with assigned partitions [[rtdetail_breakout-0]]
> >>>
> >>> 2016-12-16 17:04:51,508 [StreamThread-1] INFO
> >>> o.a.k.s.p.internals.StandbyTask - standby-task [0_0] Initializing
> state
> >>> stores
> >>>
> >>> 2016-12-16 17:04:51,508 [StreamThread-1] DEBUG
> >>> o.a.k.c.c.i.ConsumerCoordinator - Group RtDetailBreakoutProcessor
> >> fetching
> >>> committed offsets for partitions: [rtdetail_breakout-0]
> >>>
> >>> 2016-12-16 17:04:51,819 [StreamThread-1] ERROR
> >>> o.a.k.c.c.i.ConsumerCoordinator - User provided listener
> >>> org.apache.kafka.streams.processor.internals.StreamThread$1 for group
> >>> RtDetailBreakoutProcessor fa
> >>>
> >>> iled on partition assignment
> >>>
> >>> java.lang.UnsupportedOperationException: null
> >>>
> >>>         at
> >>> org.apache.kafka.streams.processor.internals.StandbyContextImpl.
> >> recordCollector(StandbyContextImpl.java:81)
> >>>
> >>>         at
> >>> org.apache.kafka.streams.state.internals.StoreChangeLogger.<init>(
> >> StoreChangeLogger.java:54)
> >>>
> >>>         at
> >>> org.apache.kafka.streams.state.internals.StoreChangeLogger.<init>(
> >> StoreChangeLogger.java:46)
> >>>
> >>>         at
> >>> org.apache.kafka.streams.state.internals.RocksDBWindowStore.init(
> >> RocksDBWindowStore.java:197)
> >>>
> >>>         at
> >>> org.apache.kafka.streams.state.internals.MeteredWindowStore.init(
> >> MeteredWindowStore.java:66)
> >>>
> >>>         at
> >>> org.apache.kafka.streams.state.internals.CachingWindowStore.init(
> >> CachingWindowStore.java:64)
> >>>
> >>>         at
> >>> org.apache.kafka.streams.processor.internals.AbstractTask.
> >> initializeStateStores(AbstractTask.java:86)
> >>>
> >>>         at
> >>> org.apache.kafka.streams.processor.internals.StandbyTask.<init>(
> >> StandbyTask.java:68)
> >>>
> >>>         at
> >>> org.apache.kafka.streams.processor.internals.StreamThread.
> >> createStandbyTask(StreamThread.java:733)
> >>>
> >>>         at
> >>> org.apache.kafka.streams.processor.internals.
> >> StreamThread.addStandbyTasks(StreamThread.java:757)
> >>>
> >>>         at
> >>> org.apache.kafka.streams.processor.internals.StreamThread.access$200(
> >> StreamThread.java:69)
> >>>
> >>>         at
> >>> org.apache.kafka.streams.processor.internals.StreamThread$1.
> >> onPartitionsAssigned(StreamThread.java:125)
> >>>
> >>>         at
> >>> org.apache.kafka.clients.consumer.internals.ConsumerCoordinator.
> >> onJoinComplete(ConsumerCoordinator.java:229)
> >>>
> >>>         at
> >>> org.apache.kafka.clients.consumer.internals.AbstractCoordinator.
> >> joinGroupIfNeeded(AbstractCoordinator.java:313)
> >>>
> >>>         at
> >>> org.apache.kafka.clients.consumer.internals.AbstractCoordinator.
> >> ensureActiveGroup(AbstractCoordinator.java:277)
> >>>
> >>>         at
> >>> org.apache.kafka.clients.consumer.internals.ConsumerCoordinator.poll(
> >> ConsumerCoordinator.java:260)
> >>>
> >>>         at
> >>> org.apache.kafka.clients.consumer.KafkaConsumer.
> >> pollOnce(KafkaConsumer.java:1013)
> >>>
> >>>         at
> >>> org.apache.kafka.clients.consumer.KafkaConsumer.poll(
> >> KafkaConsumer.java:979)
> >>>
> >>>         at
> >>> org.apache.kafka.streams.processor.internals.StreamThread.runLoop(
> >> StreamThread.java:442)
> >>>
> >>>         at
> >>> org.apache.kafka.streams.processor.internals.
> >> StreamThread.run(StreamThread.java:242)
> >>>
> >>> 2016-12-16 17:04:51,820 [StreamThread-1] DEBUG
> >>> o.a.k.c.c.i.ConsumerCoordinator - Group RtDetailBreakoutProcessor
> >> fetching
> >>> committed offsets for partitions: [rtdetail_breakout-2,
> >>> rtdetail_breakout-1, rtd
> >>>
> >>> etail_breakout-6, rtdetail_breakout-5, rtdetail_breakout_filtered-1]
> >>>
> >>> 2016-12-16 17:04:51,821 [StreamThread-1] DEBUG
> >>> o.a.k.c.consumer.internals.Fetcher - Resetting offset for partition
> >>> rtdetail_breakout-2 to the committed offset 1989670807
> >>>
> >>> 2016-12-16 17:04:51,821 [StreamThread-1] DEBUG
> >>> o.a.k.c.consumer.internals.Fetcher - Resetting offset for partition
> >>> rtdetail_breakout-1 to the committed offset 1991427117
> >>>
> >>> 2016-12-16 17:04:51,821 [StreamThread-1] DEBUG
> >>> o.a.k.c.consumer.internals.Fetcher - Resetting offset for partition
> >>> rtdetail_breakout-6 to the committed offset 1986565752
> >>>
> >>> 2016-12-16 17:04:51,821 [StreamThread-1] DEBUG
> >>> o.a.k.c.consumer.internals.Fetcher - Resetting offset for partition
> >>> rtdetail_breakout-5 to the committed offset 1982149459
> >>>
> >>> 2016-12-16 17:04:51,821 [StreamThread-1] DEBUG
> >>> o.a.k.c.consumer.internals.Fetcher - Resetting offset for partition
> >>> rtdetail_breakout_filtered-1 to the committed offset 92917
> >>>
> >>> 2016-12-16 17:04:51,821 [StreamThread-1] DEBUG
> >>> o.a.kafka.clients.NetworkClient - Initiating connection to node 115 at
> >>> 54.154.234.110:9092.
> >>>
> >>> 2016-12-16 17:04:51,821 [StreamThread-1] DEBUG
> >>> o.a.kafka.clients.NetworkClient - Initiating connection to node 114 at
> >>> 54.194.192.105:9092.
> >>>
> >>> 2016-12-16 17:04:51,821 [StreamThread-1] DEBUG
> >>> o.a.kafka.clients.NetworkClient - Initiating connection to node 112 at
> >>> 54.171.236.113:9092.
> >>>
> >>> 2016-12-16 17:04:51,821 [StreamThread-1] DEBUG
> >>> o.a.kafka.clients.NetworkClient - Initiating connection to node 111 at
> >>> 54.154.115.41:9092.
> >>>
> >>> 2016-12-16 17:04:51,821 [StreamThread-1] INFO
> >>> o.a.k.s.p.internals.StreamThread - stream-thread [StreamThread-1]
> >> Shutting
> >>> down
> >>>
> >>> 2016-12-16 17:04:51,821 [StreamThread-1] DEBUG
> >>> o.a.k.s.p.internals.StreamThread - stream-thread [StreamThread-1]
> >>> shutdownTasksAndState: shutting down all active tasks [[0_1, 0_2, 1_1,
> >> 0_5,
> >>> 0_6]] and standby tasks [[]]
> >>>
> >>> On Fri, Dec 16, 2016 at 4:53 AM, Jon Yeargers <
> jon.yeargers@cedexis.com>
> >>> wrote:
> >>>
> >>>> FWIW I put a .warn in my shutdown hook - to make sure it wasn't being
> >>>> called unknowingly.
> >>>>
> >>>> Runtime.getRuntime().addShutdownHook(new Thread(() -> {
> >>>>             try {
> >>>>                 LOGGER.warn("ShutdownHook");
> >>>>                 kafkaStreams.close();
> >>>>             } catch (Exception e) {
> >>>>                 // ignored
> >>>>             }
> >>>>         }));
> >>>>
> >>>>
> >>>> Ran another test and the app closed after ~40min. The above message
> >>>> appears 3rd from the end (several seconds after the shutdown process
> has
> >>>> commenced).
> >>>>
> >>>> (attaching log section)
> >>>>
> >>>> This has *got* to be something that I've setup improperly... I just
> >> can't
> >>>> seem to see it.
> >>>>
> >>>> On Fri, Dec 16, 2016 at 2:10 AM, Jon Yeargers <
> jon.yeargers@cedexis.com
> >>>
> >>>> wrote:
> >>>>
> >>>>> Im seeing instances where my apps are exiting (gracefully, mind
you)
> >>>>> without any obvious errors or cause. I have debug logs from many
> >> instances
> >>>>> of this and have yet to find a reason to explain what's happening.
> >>>>>
> >>>>> - nothing in the app log
> >>>>> - nothing in /var/log/messages (IE not OOM killed)
> >>>>> - not being closed via /etc/init.d
> >>>>> - nothing in the broker logs
> >>>>>
> >>>>> Running 0.10.1.0
> >>>>>
> >>>>> example log:
> >>>>>
> >>>>> https://drive.google.com/file/d/0B0KWMAAevNSteTh4aWs3SkRURU0
> >>>>> /view?usp=sharing
> >>>>>
> >>>>
> >>>>
> >>>
> >>
> >>
> >
>
>


-- 
-- Guozhang

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