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From dev loper <spark...@gmail.com>
Subject Re: Kafka Streams application Unable to Horizontally scale and the application on other instances refusing to start.
Date Thu, 21 Sep 2017 03:26:22 GMT
Thank you Bill, Apologies for late reply .

On Mon, Sep 18, 2017 at 5:45 PM, Bill Bejeck <bill@confluent.io> wrote:

> Hi,
>
> I just sent you a follow-up message on the other thread we have going
> regarding state store performance.
>
> I guess we can consider this thread closed and we'll continue working on
> the State Store thread.
>
> Thanks!
> Bill
>
>
>
> On Mon, Sep 18, 2017 at 7:27 AM, dev loper <sparkemr@gmail.com> wrote:
>
> > Hi Ted, Damian, Bill & Sabarish,
> >
> > I would like to thank you guys for all the help offered to solve this
> > issue. Seems like the persistent store was not scaling out as expected .
> > After state store builds up over period of time , the performance of the
> > kafka streams application was performing poorly since the persistent
> state
> > operations was taking considerable time to complete the PUT and fetch
> > operations. As soon as I switched to Memory Store all the problems
> > disappeared and the application was able o handle all the load ..
> >
> > But I couldn't still figure why Kafka Streams based  persistent store did
> > not scale out as expected. There is another thread which I have created
> on
> > State Store asking for inputs from you guys to improve state store
> > performance.
> >
> > Thanks
> >
> > Dev.
> >
> >
> >
> >
> >
> > On Sun, Sep 17, 2017 at 8:55 PM, Sabarish Sasidharan <
> > sabarish.spk@gmail.com
> > > wrote:
> >
> > > Is there anything abnormal in network performance for your Kafka
> brokers
> > > ec2 instances and Kafka stream processor ec2 instances? Is the network
> > link
> > > getting saturated? If so you might want to upgrade Kafka brokers to an
> > > instance type with more network bandwidth.
> > >
> > > I would also go check the memory utilization and see if some oom killer
> > or
> > > something similar is playing truant.
> > >
> > > I assume you have already validated with max poll records set to 500.
> > >
> > > Regards
> > > Sab
> > >
> > > On 15 Sep 2017 11:49 am, "dev loper" <sparkemr@gmail.com> wrote:
> > >
> > > > Dear Kafka Users,
> > > >
> > > > I am fairly new to Kafka Streams . I have deployed two instances of
> > Kafka
> > > > 0.11 brokers on AWS M3.Xlarge insatnces. I have created a topic with
> 36
> > > > partitions .and speperate application writes to this topic and it
> > > produces
> > > > records at the rate of 10000 messages per second. I have threes
> > instances
> > > > of AWS  M4.xlarge instance  where my Kafka streams application is
> > running
> > > > which consumes these messages produced by the other application. The
> > > > application  starts up fine working fine and its processing messages
> on
> > > the
> > > > first instance,  but when I start the same application on other
> > instances
> > > > it is not starting even though the process is alive it is not
> > processing
> > > > messages.Also I could see the other instances takes a long time to
> > start
> > > .
> > > >
> > > > Apart from first instance,  other instances I could see the consumer
> > > > getting added and removed repeatedly and I couldn't see any message
> > > > processing at all . I have attached the detailed logs where this
> > behavior
> > > > is observed.
> > > >
> > > > Consumer is getting started with below log in these instances and
> > getting
> > > > stopped with below log (* detailed logs attached *)
> > > >
> > > > INFO  | 21:59:30 | consumer.ConsumerConfig (AbstractConfig.java:223)
> -
> > > > ConsumerConfig values:
> > > >     auto.commit.interval.ms = 5000
> > > >     auto.offset.reset = latest
> > > >     bootstrap.servers = [l-mykafkainstancekafka5101:9092,
> > > > l-mykafkainstancekafka5102:9092]
> > > >     check.crcs = true
> > > >     client.id =
> > > >     connections.max.idle.ms = 540000
> > > >     enable.auto.commit = false
> > > >     exclude.internal.topics = true
> > > >     fetch.max.bytes = 52428800
> > > >     fetch.max.wait.ms = 500
> > > >     fetch.min.bytes = 1
> > > >     group.id = myKafka-kafkareplica101Sept08
> > > >     heartbeat.interval.ms = 3000
> > > >     interceptor.classes = null
> > > >     internal.leave.group.on.close = true
> > > >     isolation.level = read_uncommitted
> > > >     key.deserializer = class mx.july.jmx.proximity.kafka.
> > KafkaKryoCodec
> > > >     max.partition.fetch.bytes = 1048576
> > > >     max.poll.interval.ms = 300000
> > > >     max.poll.records = 500
> > > >     metadata.max.age.ms = 300000
> > > >     metric.reporters = []
> > > >     metrics.num.samples = 2
> > > >     metrics.recording.level = INFO
> > > >     metrics.sample.window.ms = 30000
> > > >     partition.assignment.strategy = [class org.apache.kafka.clients.
> > > > consumer.RangeAssignor]
> > > >     receive.buffer.bytes = 65536
> > > >     reconnect.backoff.max.ms = 1000
> > > >     reconnect.backoff.ms = 50
> > > >     request.timeout.ms = 305000
> > > >     retry.backoff.ms = 100
> > > >     sasl.jaas.config = null
> > > >     sasl.kerberos.kinit.cmd = /usr/bin/kinit
> > > >     sasl.kerberos.min.time.before.relogin = 60000
> > > >     sasl.kerberos.service.name = null
> > > >     sasl.kerberos.ticket.renew.jitter = 0.05
> > > >     sasl.kerberos.ticket.renew.window.factor = 0.8
> > > >     sasl.mechanism = GSSAPI
> > > >     security.protocol = PLAINTEXT
> > > >     send.buffer.bytes = 131072
> > > >     session.timeout.ms = 10000
> > > >     ssl.cipher.suites = null
> > > >     ssl.enabled.protocols = [TLSv1.2, TLSv1.1, TLSv1]
> > > >     ssl.endpoint.identification.algorithm = null
> > > >     ssl.key.password = null
> > > >     ssl.keymanager.algorithm = SunX509
> > > >     ssl.keystore.location = null
> > > >     ssl.keystore.password = null
> > > >     ssl.keystore.type = JKS
> > > >     ssl.protocol = TLS
> > > >     ssl.provider = null
> > > >     ssl.secure.random.implementation = null
> > > >     ssl.trustmanager.algorithm = PKIX
> > > >     ssl.truststore.location = null
> > > >     ssl.truststore.password = null
> > > >     ssl.truststore.type = JKS
> > > >     value.deserializer = class my.dev.MessageUpdateCodec
> > > >
> > > >
> > > > DEBUG | 21:59:30 | consumer.KafkaConsumer (KafkaConsumer.java:1617) -
> > The
> > > > Kafka consumer has closed. and the whole process repeats.
> > > >
> > > >
> > > >
> > > > Below you can find my startup code for kafkastreams and the
> parameters
> > > > which I have configured for starting the kafkastreams application .
> > > >
> > > >         private static Properties settings = new Properties();
> > > >         settings.put(StreamsConfig.APPLICATION_ID_CONFIG,
> > > > "mykafkastreamsapplication");
> > > >         settings.put(ConsumerConfig.AUTO_OFFSET_RESET_CONFIG,"
> > latest");
> > > >         settings.put(ConsumerConfig.HEARTBEAT_INTERVAL_MS_CONFIG,"
> > > 10000");
> > > >         settings.put(ConsumerConfig.SESSION_TIMEOUT_MS_CONFIG,"
> > 30000");
> > > >         settings.put(ConsumerConfig.MAX_POLL_INTERVAL_MS_CONFIG,Inte
> > > > ger.MAX_VALUE);
> > > >         settings.put(ConsumerConfig.MAX_POLL_RECORDS_CONFIG,
> "10000");
> > > >         settings.put(ConsumerConfig.CONNECTIONS_MAX_IDLE_MS_CONFIG,"
> > > > 60000");
> > > >
> > > >         KStreamBuilder builder = new KStreamBuilder();
> > > >         KafkaStreams streams = new KafkaStreams(builder, settings);
> > > >         builder.addSource(.....
> > > >          .addProcessor  .............
> > > >          .addProcessor  ........
> > > >
> > > >          .addStateStore(...................).persistent().build(),"
> > > > myprocessor")
> > > >          .addSink ..............
> > > >          . addSink ..............
> > > >           streams.start();
> > > >
> > > > and I am using a Simple  processor to process my logic ..
> > > >
> > > > public class InfoProcessor extends AbstractProcessor<Key, Update>
{
> > > > private static Logger logger = Logger.getLogger(
> InfoProcessor.class);
> > > > private ProcessorContext context;
> > > > private KeyValueStore<Key, Info> infoStore;
> > > >
> > > > @Override
> > > > @SuppressWarnings("unchecked")
> > > > public void init(ProcessorContext context) {
> > > >     this.context = context;
> > > >     this.context.schedule(Constants.BATCH_DURATION_SECONDS * 1000);
> > > >     infoStore = (KeyValueStore<Key, Info>) context.getStateStore("
> > > > InfoStore");
> > > > }
> > > >
> > > > @Override
> > > > public void process(Key key, Update update) {
> > > >     try {
> > > >         if (key != null && update != null) {
> > > >             Info info = infoStore.get(key);
> > > >             // merge logic
> > > >             infoStore.put(key, info);
> > > >         }
> > > >
> > > >     } catch (Exception e) {
> > > >         logger.error(e.getMessage(), e);
> > > >     } finally {
> > > >     }
> > > >     context.commit();
> > > > }
> > > >
> > > > @Override
> > > > public void punctuate(long timestamp) {
> > > >     try {
> > > >         KeyValueIterator<Key, Info> iter = this.infoStore.all();
> > > >         while (iter.hasNext()) {
> > > >             // processing logic
> > > >
> > > >         }
> > > >         iter.close();
> > > >         context.commit();
> > > >     } catch (Exception e) {
> > > >         logger.error(e.getMessage(), e);
> > > >     }
> > > > }
> > > >
> > > >
> > > >
> > > >
> > > >
> > >
> >
>

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