Hi Phil,
I have just uploaded a template to [1] that will illustrate integrating NiFi with Kafka using the Confluent Schema Registry. The template will be at the bottom of the linked page. The instructions there should illustrate how to publish a compatible schema to the Confluent Schema Registry and then use NiFi to write data to the Kafka topic in a compatible way. The template generates some CSV data and then writes it to Kafka in Avro based on the Confluent Schema Registry. Please check out the template and see if that helps you get going! Thanks -Mark [1] https://cwiki.apache.org/confluence/display/NIFI/Example+Dataflow+Templates Example Dataflow Templates - Apache NiFi - Dashboard<https://cwiki.apache.org/confluence/display/NIFI/Example+Dataflow+Templates> cwiki.apache.org Apache NiFi provides users the ability to build very large and complex DataFlows using NiFi. This is achieved by using the basic components: Processor, Funnel, Input ... ________________________________ From: [email protected] <[email protected]> Sent: Tuesday, September 5, 2017 9:47 AM To: [email protected] Subject: RE: Nifi kafka ser/deser problem Hello Bryan, Schema Write Strategy : Confluent Schema Registry Reference Schema Access strategy : Use 'Schema Name' Property Schema registry : ConfluentSchemaRegistry Schema Name : topic7 Schema Text : ${avro.schema} Compression Format : NONE Thanks Phil -----Original Message----- From: Bryan Bende [mailto:[email protected]] Sent: mardi 5 septembre 2017 16:39 To: [email protected] Subject: Re: Nifi kafka ser/deser problem Phil, What is the "Schema Write Strategy" set to on the AvroRecordSetWriter? -Bryan On Tue, Sep 5, 2017 at 10:23 AM, <[email protected]> wrote: > Hello Joe > > This json content > {"type":"room","id":"room11","attributes":{"position":"47.100,3.246"," > surface":223,"norme":"NF"}} > > is the input of the PublishKafkaRecord_0_10 processor. This processor have > among others the following properties set : > > Record Reader : JsonTreeReader --> pointing to the > ConfluentSchemaRegistry Record Writer : AvroRecordSetWriter -> > pointing to the confluentSchemaRegistry > > > I trace the call to confluent registry and I see the get on the > subject ( Confluent registry side) And I also see the binary > content on a consumer shell console (kafka-console-consumer ) > --------------- > room > room1147.100,3.246▒NF > ------------------------------- > > Thanks > Phil > > -----Original Message----- > From: Joe Witt [mailto:[email protected]] > Sent: mardi 5 septembre 2017 15:26 > To: [email protected] > Subject: Re: Nifi kafka ser/deser problem > > Hello > > Can you share the details of how you're serializing the data? We'll need to > understand the configuration of the record writer of the publish kafka > process to help discuss about reading it back (be that in nifi or otherwise). > > Since we support multiple modes of encoding the schema information this is > the most likely source of difficulty. > > Thanks > Joe > > On Tue, Sep 5, 2017 at 8:53 AM, <[email protected]> wrote: >> Hello, My SW environment à Nifi 1.4 compiled from sources , on Ubuntu >> 14.04 and a running Confluent 3.3 Platform (running Confluent >> Registry and kafkaStreams ) >> >> I have a process group with a PublishKafkaRecord_0_10 that serialize >> a record ( with 3 fields) >> >> And another process group with a ConsumeKafkaRecord_0_10 that >> deserialise the record . that works nicely with reader/writer and with the >> Confluent >> Registry storing the Avro MetaData. >> >> I do not have ser/deser problems because I think Nifi does both jobs >> …… >> >> >> >> But I got problems of deserialization if I put some java Kafka client in >> the game … ( try to consume from Confluent Kafka Streams ) >> >> I got some deserialization exception : >> >> org.apache.kafka.common.errors.SerializationException: Error >> deserializing Avro message for id -1 >> >> >> >> Any trick to force another serialization ( nifi side) or >> deserialization ( confluent side ) ? >> >> >> >> Best >> >> Phil >> >> >> >> _____________________________________________________________________ >> _ ___________________________________________________ >> >> Ce message et ses pieces jointes peuvent contenir des informations >> confidentielles ou privilegiees et ne doivent donc pas etre diffuses, >> exploites ou copies sans autorisation. Si vous avez recu ce message >> par erreur, veuillez le signaler a l'expediteur et le detruire ainsi >> que les pieces jointes. Les messages electroniques etant susceptibles >> d'alteration, Orange decline toute responsabilite si ce message a ete >> altere, deforme ou falsifie. Merci. >> >> This message and its attachments may contain confidential or >> privileged information that may be protected by law; they should not >> be distributed, used or copied without authorisation. >> If you have received this email in error, please notify the sender >> and delete this message and its attachments. >> As emails may be altered, Orange is not liable for messages that have >> been modified, changed or falsified. >> Thank you. > > ______________________________________________________________________ > ___________________________________________________ > > Ce message et ses pieces jointes peuvent contenir des informations > confidentielles ou privilegiees et ne doivent donc pas etre diffuses, > exploites ou copies sans autorisation. Si vous avez recu ce message > par erreur, veuillez le signaler a l'expediteur et le detruire ainsi que les > pieces jointes. Les messages electroniques etant susceptibles d'alteration, > Orange decline toute responsabilite si ce message a ete altere, deforme ou > falsifie. Merci. > > This message and its attachments may contain confidential or > privileged information that may be protected by law; they should not be > distributed, used or copied without authorisation. > If you have received this email in error, please notify the sender and delete > this message and its attachments. > As emails may be altered, Orange is not liable for messages that have been > modified, changed or falsified. > Thank you. > _________________________________________________________________________________________________________________________ Ce message et ses pieces jointes peuvent contenir des informations confidentielles ou privilegiees et ne doivent donc pas etre diffuses, exploites ou copies sans autorisation. Si vous avez recu ce message par erreur, veuillez le signaler a l'expediteur et le detruire ainsi que les pieces jointes. Les messages electroniques etant susceptibles d'alteration, Orange decline toute responsabilite si ce message a ete altere, deforme ou falsifie. Merci. This message and its attachments may contain confidential or privileged information that may be protected by law; they should not be distributed, used or copied without authorisation. If you have received this email in error, please notify the sender and delete this message and its attachments. As emails may be altered, Orange is not liable for messages that have been modified, changed or falsified. Thank you.
