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From "ASF GitHub Bot (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (FLINK-3061) Kafka Consumer is not failing if broker is not available
Date Tue, 24 Nov 2015 10:15:11 GMT

    [ https://issues.apache.org/jira/browse/FLINK-3061?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15024189#comment-15024189
] 

ASF GitHub Bot commented on FLINK-3061:
---------------------------------------

Github user aljoscha commented on the pull request:

    https://github.com/apache/flink/pull/1395#issuecomment-159217845
  
    Could it happen that a broker is currently not available but will be in the future. With
the behaviour before this PR could Flink then idle and start consuming once the broker becomes
available?


> Kafka Consumer is not failing if broker is not available
> --------------------------------------------------------
>
>                 Key: FLINK-3061
>                 URL: https://issues.apache.org/jira/browse/FLINK-3061
>             Project: Flink
>          Issue Type: Bug
>          Components: Kafka Connector
>            Reporter: Robert Metzger
>            Assignee: Robert Metzger
>             Fix For: 1.0.0
>
>
> It seems that the FlinkKafkaConsumer is just logging the errors when trying to get the
initial list of partitions for the topic, but its not failing.
> The following code ALWAYS runs, even if there is no broker or zookeeper running.
> {code}
>  def main(args: Array[String]) {
>     val env = StreamExecutionEnvironment.getExecutionEnvironment
>     val properties = new Properties()
>     properties.setProperty("bootstrap.servers", "localhost:9092")
>     properties.setProperty("zookeeper.connect", "localhost:2181")
>     properties.setProperty("group.id", "test")
>     val stream = env
>       .addSource(new FlinkKafkaConsumer082[String]("topic", new SimpleStringSchema(),
properties))
>       .print
>     env.execute("Flink Kafka Example")
>   }
> {code}
> The runtime consumers are designed to idle when they have no partitions assigned, but
there is no check that there are no partitions at all.



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