Hi Manoj, Thanks but we caught the issue, it was coming most probably because the wrong jar was being picked up from hdfs and was being set in oozie classpath at runtime. In our code, kafka-client is on 2.3 but while running MR job 0.8.2.0 jar was being picked up. We caught it after seeing the producer client logs in our application, kafka-client version was different there. After removing that old jar, we have not observed this issue since.
*Regards,* *Prateek Rajput* <prateek.raj...@flipkart.com> On Wed, Aug 26, 2020 at 9:55 AM <manoj.agraw...@cognizant.com> wrote: > What error you are getting , can you share the exact error ? > What is version of kafka lib at client side ? > > On 8/25/20, 7:50 AM, "Prateek Rajput" <prateek.raj...@flipkart.com.INVALID> > wrote: > > [External] > > > Hi, please if anyone can help, will be a huge favor. > > *Regards,* > *Prateek Rajput* <prateek.raj...@flipkart.com> > > > On Tue, Aug 25, 2020 at 12:06 AM Prateek Rajput < > prateek.raj...@flipkart.com> > wrote: > > > Hi everyone, > > I am new to Kafka, and recently started working on kafka in my > company. We > > recently migrated our client and cluster from the *0.10.x* version to > > *2.3.0*. I am facing this issue quite often. > > I have provided all brokers in *bootstrap.servers* config to > instantiate > > the producer client but while using this client for batch publishing, > > sometimes some of my mappers get stuck. > > I debugged and found that one broker was down (for some maintenance > > activity). Now it was getting stuck because the mapper's client was > trying > > to connect to that node only for the very first time. And it was > failing > > with NoRouteToHost Exception. > > I have read that the very first time the client will select a random > > broker and will try to connect with that broker to get the meta-data > of the > > whole cluster. Is there any way so that on such exceptions it can > switch to > > another node dynamically and should not try to connect to the same > box > > again and again. > > > > *Regards,* > > *Prateek Rajput* <prateek.raj...@flipkart.com> > > > > -- > > > > > *-----------------------------------------------------------------------------------------* > > > *This email and any files transmitted with it are confidential and > intended solely for the use of the individual or entity to whom they > are > addressed. If you have received this email in error, please notify the > system manager. This message contains confidential information and is > intended only for the individual named. If you are not the named > addressee, > you should not disseminate, distribute or copy this email. Please > notify > the sender immediately by email if you have received this email by > mistake > and delete this email from your system. 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