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https://issues.apache.org/jira/browse/KAFKA-5065?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16435030#comment-16435030
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Qiang Zhao commented on KAFKA-5065:
-----------------------------------

it's found in 1.1.0 as well. I made another fix: 
[https://github.com/apache/kafka/pull/4858]

 

> AbstractCoordinator.ensureCoordinatorReady() stuck in loop if absent any 
> bootstrap servers 
> -------------------------------------------------------------------------------------------
>
>                 Key: KAFKA-5065
>                 URL: https://issues.apache.org/jira/browse/KAFKA-5065
>             Project: Kafka
>          Issue Type: Bug
>          Components: clients
>    Affects Versions: 0.10.0.0, 0.10.0.1, 0.10.1.0, 0.10.1.1, 0.10.2.0
>            Reporter: Vladimir Porshkevich
>            Assignee: james chien
>            Priority: Major
>              Labels: newbie
>   Original Estimate: 4m
>  Remaining Estimate: 4m
>
> If Consumer started with wrong bootstrap servers or absent any valid servers, 
> and Thread call Consumer.poll(timeout) with any timeout Thread stuck in loop 
> with debug logs like
> {noformat}
> org.apache.kafka.common.network.Selector - Connection with /172.31.1.100 
> disconnected
> java.net.ConnectException: Connection timed out: no further information
>       at sun.nio.ch.SocketChannelImpl.checkConnect(Native Method)
>       at 
> sun.nio.ch.SocketChannelImpl.finishConnect(SocketChannelImpl.java:717)
>       at 
> org.apache.kafka.common.network.PlaintextTransportLayer.finishConnect(PlaintextTransportLayer.java:51)
>       at 
> org.apache.kafka.common.network.KafkaChannel.finishConnect(KafkaChannel.java:81)
>       at 
> org.apache.kafka.common.network.Selector.pollSelectionKeys(Selector.java:335)
>       at org.apache.kafka.common.network.Selector.poll(Selector.java:303)
>       at org.apache.kafka.clients.NetworkClient.poll(NetworkClient.java:349)
>       at 
> org.apache.kafka.clients.consumer.internals.ConsumerNetworkClient.poll(ConsumerNetworkClient.java:226)
>       at 
> org.apache.kafka.clients.consumer.internals.ConsumerNetworkClient.poll(ConsumerNetworkClient.java:203)
>       at 
> org.apache.kafka.clients.consumer.internals.ConsumerNetworkClient.awaitMetadataUpdate(ConsumerNetworkClient.java:138)
>       at 
> org.apache.kafka.clients.consumer.internals.AbstractCoordinator.ensureCoordinatorReady(AbstractCoordinator.java:216)
>       at 
> org.apache.kafka.clients.consumer.internals.AbstractCoordinator.ensureCoordinatorReady(AbstractCoordinator.java:193)
>       at 
> org.apache.kafka.clients.consumer.internals.ConsumerCoordinator.poll(ConsumerCoordinator.java:275)
>       at 
> org.apache.kafka.clients.consumer.KafkaConsumer.pollOnce(KafkaConsumer.java:1030)
>       at 
> org.apache.kafka.clients.consumer.KafkaConsumer.poll(KafkaConsumer.java:995)
>       at 
> com.example.SccSpringCloudDemoApplication.main(SccSpringCloudDemoApplication.java:46)
> {noformat}
> Problem with AbstractCoordinator.ensureCoordinatorReady() method
> It uses Long.MAX_VALUE as timeout.



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