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Kafka >> mail # dev >> [jira] [Commented] (KAFKA-690) TopicMetadataRequest throws exception when no topics are specified


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[jira] [Commented] (KAFKA-690) TopicMetadataRequest throws exception when no topics are specified

    [ https://issues.apache.org/jira/browse/KAFKA-690?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13547665#comment-13547665 ]

Neha Narkhede commented on KAFKA-690:
-------------------------------------

+1. Thanks for the patch !
                
> TopicMetadataRequest throws exception when no topics are specified
> ------------------------------------------------------------------
>
>                 Key: KAFKA-690
>                 URL: https://issues.apache.org/jira/browse/KAFKA-690
>             Project: Kafka
>          Issue Type: Bug
>          Components: core
>    Affects Versions: 0.8
>            Reporter: David Arthur
>             Fix For: 0.8
>
>         Attachments: KAFKA-690.patch
>
>
> If no topics are sent in a TopicMetadataRequest, `readFrom` throws an exception when trying to get the the head of the topic list for a debug statement.
> java.util.NoSuchElementException: head of empty list
> at scala.collection.immutable.Nil$.head(List.scala:386)
> at scala.collection.immutable.Nil$.head(List.scala:383)
> at kafka.api.TopicMetadataRequest$$anonfun$readFrom$2.apply(TopicMetadataRequest.scala:43)
> at kafka.api.TopicMetadataRequest$$anonfun$readFrom$2.apply(TopicMetadataRequest.scala:43)
> at kafka.utils.Logging$class.debug(Logging.scala:51)
> at kafka.api.TopicMetadataRequest$.debug(TopicMetadataRequest.scala:25)
> at kafka.api.TopicMetadataRequest$.readFrom(TopicMetadataRequest.scala:43)
> at kafka.api.RequestKeys$$anonfun$4.apply(RequestKeys.scala:37)
> at kafka.api.RequestKeys$$anonfun$4.apply(RequestKeys.scala:37)
> at kafka.network.RequestChannel$Request.<init>(RequestChannel.scala:47)
> at kafka.network.Processor.read(SocketServer.scala:320)
> at kafka.network.Processor.run(SocketServer.scala:231)
> at java.lang.Thread.run(Thread.java:680)

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