I shutdown 3 out 5. With 2 brokers I start seeing failures after successfully sending some messages. Not all messages are failing. I wanted to understand the case/s when we log below message? If you notice there is difference in send/receive buffer size of actual and requested. I don’t see this message in log for successful messages. Is it normal?
[2014-08-08 16:47:35,179] DEBUG Accepted connection from /10.254.243.142 on /10.66.107.231:9092. sendBufferSize [actual|requested]: [131071|1048576] recvBufferSize [actual|requested]: [131071|1048576] (kafka.network.Acceptor) -----Original Message----- From: Guozhang Wang [mailto:wangg...@gmail.com] Sent: Monday, August 11, 2014 10:01 AM To: users@kafka.apache.org Subject: Re: Error while producing messages I am not sure I understand completely. How many brokers did you shutdown out of the total number of 5 brokers? With single-partition topics, if the replication factor is 3, this partition will be hosted on 3 brokers. Guozhang On Mon, Aug 11, 2014 at 9:46 AM, Tanneru, Raj <rstann...@ebay.com> wrote: > Sorry I should have provided this information. All my topics have > single partition meaning there are 2 nodes that already have topic > partition. It's just that the node having 3rd partition is down. So if > a message fails there is no reason why other message should succeed, > unless there is network saturation, broker resource exhaustion etc. > > Thanks, > Raj Tanneru > > -----Original Message----- > From: Guozhang Wang [mailto:wangg...@gmail.com] > Sent: Sunday, August 10, 2014 10:14 PM > To: users@kafka.apache.org > Subject: Re: Error while producing messages > > With replication of 3, partitions that happen to be only hosted on > those 3 shutdown brokers would be not available, unless controlled shutdown > is used. > > Guozhang > > > On Sat, Aug 9, 2014 at 10:59 AM, Tanneru, Raj <rstann...@ebay.com> wrote: > > > Guozhang, > > > > Our replication factor is 3. > > > > > > Thanks, > > Raj Tanneru > > > > > > -------- Original message -------- > > From: Guozhang Wang > > Date:08/09/2014 10:21 AM (GMT-08:00) > > To: users@kafka.apache.org > > Subject: Re: Error while producing messages > > > > Raj, > > > > What is your replication factor setting in kafka brokers? > > > > Guozhang > > > > > > On Fri, Aug 8, 2014 at 5:02 PM, Tanneru, Raj <rstann...@ebay.com> wrote: > > > > > Hi, > > > > > > > > > > > > I am trying to do capacity sizing estimate for our kafka cluster. > > > I started with 5 broker cluster and 3 node zk. Used a simple java > > > based producer to send messages to 5 topics that are created in > > > the cluster. I used 2 client machines with 100 worker threads each > > > sending messages continuously. I didn't see any exceptions or > > > issues when all 5 brokers > > are > > > up. When I take down 3 brokers out of 5, and 4 topics out of 5. I > > > am > > seeing > > > below in broker logs. > > > > > > > > > > > > [2014-08-08 16:47:34,977] DEBUG Closing connection from / > > > 10.254.243.142:33944 (kafka.network.Processor) > > > > > > [2014-08-08 16:47:35,179] DEBUG Accepted connection from > > > /10.254.243.142 on /10.66.107.231:9092. sendBufferSize > [actual|requested]: > > > [131071|1048576] recvBufferSize [actual|requested]: > > > [131071|1048576] > > > (kafka.network.Acceptor) > > > > > > [2014-08-08 16:47:35,179] DEBUG Processor 860 listening to new > > > connection from /10.254.243.142:33947 (kafka.network.Processor) > > > > > > [2014-08-08 16:47:35,179] DEBUG [KafkaApi-1] Error while fetching > > metadata > > > for [item_topic_0,0]. Possible cause: null > > > (kafka.server.KafkaApis) > > > > > > [2014-08-08 16:47:35,207] INFO Closing socket connection to / > > > 10.254.243.142. (kafka.network.Processor) > > > > > > [2014-08-08 16:47:35,207] DEBUG Closing connection from / > > > 10.254.243.142:33947 (kafka.network.Processor) > > > > > > [2014-08-08 16:47:35,294] DEBUG Accepted connection from > > > /10.254.243.142 on /10.66.107.231:9092. sendBufferSize > [actual|requested]: > > > [131071|1048576] recvBufferSize [actual|requested]: > > > [131071|1048576] > > > (kafka.network.Acceptor) > > > > > > > > > > > > On the client machine(producer) I am seeing below error. Again > > > only one topic and 2 broker nodes are running. > > > > > > > > > > > > Exception in thread "pool-1-thread-107" > > > kafka.common.FailedToSendMessageException: Failed to send messages > > > after > > 3 > > > tries. > > > > > > Sending message 181171284512 for topic item_topic_0 > > > > > > at > > > > > kafka.producer.async.DefaultEventHandler.handle(DefaultEventHandler. > > sc > > ala:90) > > > > > > at kafka.producer.Producer.send(Producer.scala:76) > > > > > > at kafka.javaapi.producer.Producer.send(Producer.scala:33) > > > > > > at > > > > > com.ebay.cassini.feeder.nrt.kafka.producer.WorkerThread.produceKafka > > Me > > ssage(WorkerThread.java:33) > > > > > > at > > > > > com.ebay.cassini.feeder.nrt.kafka.producer.WorkerThread.run(WorkerTh > > re > > ad.java:27) > > > > > > at > > > > > java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExe > > cu > > tor.java:886) > > > > > > at > > > > > java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor. > > java:908) > > > > > > at java.lang.Thread.run(Thread.java:662) > > > > > > Exception in thread "pool-1-thread-108" > > > kafka.common.FailedToSendMessageException: Failed to send messages > > > after > > 3 > > > tries. > > > > > > Sending message 221252534837 for topic item_topic_0 > > > > > > at > > > > > kafka.producer.async.DefaultEventHandler.handle(DefaultEventHandler. > > sc > > ala:90) > > > > > > at kafka.producer.Producer.send(Producer.scala:76) > > > > > > at kafka.javaapi.producer.Producer.send(Producer.scala:33) > > > > > > at > > > > > com.ebay.cassini.feeder.nrt.kafka.producer.WorkerThread.produceKafka > > Me > > ssage(WorkerThread.java:33) > > > > > > at > > > > > com.ebay.cassini.feeder.nrt.kafka.producer.WorkerThread.run(WorkerTh > > re > > ad.java:27) > > > > > > at > > > > > java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExe > > cu > > tor.java:886) > > > > > > at > > > > > java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor. > > java:908) > > > > > > at java.lang.Thread.run(Thread.java:662) > > > > > > > > > > > > Not all messages are erroring out. Only a few messages are failing. > > > Any idea what could be going on? > > > > > > > > > > > > Thanks, > > > > > > Raj Tanneru > > > > > > > > > > > -- > > -- Guozhang > > > > > > -- > -- Guozhang > -- -- Guozhang
