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From Ewen Cheslack-Postava <e...@confluent.io>
Subject Re: New question / request on kafka consumer
Date Mon, 02 Jan 2017 19:06:23 GMT
This sounds related to https://issues.apache.org/jira/browse/KAFKA-1894
Currently the consumer won't timeout when it cannot contact the brokers.

-Ewen

On Wed, Dec 14, 2016 at 5:21 AM, Costache, Vlad <
vlad.costache@metrosystems.net> wrote:

> Hello,
>
>
>
> We are trying to make a consumer for kafka, (client code alone and camel
> integrated) and we ended in a blocking point.
>
> Can you please give us an advice, or any other idea?
>
>
>
> Our problem:
>
> -          We create a kafka consumer that connects to a wrong server
> (wrong ip/port), and the consumer get stuck in “poll” method even the
> connection is not created.
>
> -          We tried also with camel, but the same problem (as the same
> kafka client is called)
>
> -          It seems that there is a bug in kafka java client that the
> connection ends up in a loop
>
> -          For producer everything is fine.
>
>
>
> Do you have any advice, or can you confirm that there is a bug? Do you
> plan to fix this? Our production code will be with camel, so there will be
> needed an exception to be thrown so we can make our data error handling.
>
>
>
> *How can we make the consumer throw exception if the connection to server
> is not created successfully or the connection is lost at some point?*
>
>
>
>
>
> Our environment:
>
> Standalone:
>
>                     <dependencies>
>
>               <dependency>
>
>               <groupId>org.apache.kafka</groupId>
>
>               <artifactId>kafka_2.11</artifactId>
>
>               <version>0.10.0.0</version>
>
>               </dependency>
>
>
>
> With camel:
>
>               <dependency>
>
>                      <groupId>org.apache.camel</groupId>
>
>                      <artifactId>camel-*kafka*</artifactId>
>
>                      <version>2.17.0.redhat-630187</version>
>
>               </dependency>
>
>
>
>
>
> The dummy code example is attached.
>
>
>
> Or camel:
>
>
>
>            //server do not exist
>
>         from("kafka:10.97.210.222:8093?topic=testTopic_
> mip133&groupId=testing&autoOffsetReset=earliest&consumersCount=1"
> ).process(*new* Processor(
>
>                 ) {
>
>
>
>             @Override
>
>             *public* *void* process(Exchange exchange) *throws* Exception
> {
>
>                 *LOG*.info(*new* MsbHeaderImpl(), "Am primit header: " +
> exchange.getIn().getHeaders());
>
>                 *LOG*.info(*new* MsbHeaderImpl(), "Am primit body: " +
> exchange.getIn().getBody());
>
>
>
>             }
>
>         });
>
>
>
>
>
> Kafka server version: kafka_2.10-0.10.1.0
>
>
>
>
>
> Thanks,
>
> Vlad
>
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