question Re: GetKafka not getting messages in Apache Nifi in Archives of Support Questions (Read Only)

GetKafka not getting messages in Apache Nifi

johnydoe — Sun, 18 Aug 2019 11:33:01 GMT

I'm trying to get the messages using a GetKafka processor but I'm not able to get it. I tested consuming messages using Kafka command line consumer and it works. I was also able to use PutKafka processor successfully to put the messages in the topic. Attached my settings where I set the Zookeeper Connection String and Topic Name. When I run the flow, I don't see any errors in the processors.

I see an exception in nifi-app.log: 2016-08-03 09:34:33,722 WARN [70e1df87-6097-4ed0-9a40-7e36f9be6921_mydomain.com-1470231250839-1fbd0cfe-leader-finder-thread] kafka.client.ClientUtils$ Fetching topic metadata with correlation id 0 for topics [Set(test)] from broker [id:0,host:DataSlave1.mydomain.com, port:9092] failed java.nio.channels.ClosedByInterruptException: null at java.nio.channels.spi.AbstractInterruptibleChannel.end(AbstractInterruptibleChannel.java:202) ~[na:1.8.0_101] at sun.nio.ch.SocketChannelImpl.poll(SocketChannelImpl.java:957) ~[na:1.8.0_101]

Versions: Kafka (0.8): 2.10-0.8.2.1, Nifi: 0.7.0 Am I missing anything?

Also tested with Kafka 0.10 and had the same problem. Thanks.

Re: GetKafka not getting messages in Apache Nifi

RyanCicak — Thu, 04 Aug 2016 01:29:06 GMT

Hi @john doe (by the way love the name)

Take a look at this https://community.hortonworks.com/questions/44374/nifi-putkafka-and-verifying-published-messages.html -> it looks like the same issue.

Re: GetKafka not getting messages in Apache Nifi

RyanCicak — Tue, 09 Aug 2016 02:32:43 GMT

Hi @john doe

I recently ran PutKafka and GetKafka in NiFi (connecting to a local VM). I found that adding the FQDN and ip to /etc/hosts made this work for me.

For example if the FQDN is host1.local and IP is 192.168.4.162 then adding

192.168.4.162 host1.local to /etc/hosts

Made this work.