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https://issues.apache.org/jira/browse/KAFKA-371?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13417383#comment-13417383
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Jonathan Creasy commented on KAFKA-371:
---------------------------------------
Well, I didn't see any way for the bug to have occurred unless createLog was
being called outside of where getLogPool gets called. So, it does appear to be
unnecessary, perhaps these checks were added and the ticket was never updated?
> Creating topic of empty string puts broker in a bad state
> ---------------------------------------------------------
>
> Key: KAFKA-371
> URL: https://issues.apache.org/jira/browse/KAFKA-371
> Project: Kafka
> Issue Type: Bug
> Affects Versions: 0.6, 0.7
> Reporter: Martin Kleppmann
> Fix For: 0.8
>
> Attachments: KAFKA-371-0.7.1.patch, KAFKA-371-0.8.patch
>
>
> Using the Java client library, I accidentally published a message where the
> topic name was the empty string. This put the broker in a bad state where
> publishing became impossible, and the following exception was logged 10-20
> times per second:
> 2012-06-21 00:41:30,324 [kafka-processor-3] ERROR kafka.network.Processor -
> Closing socket for /127.0.0.1 because of er
> ror
> kafka.common.InvalidTopicException: topic name can't be empty
> at kafka.log.LogManager.getOrCreateLog(LogManager.scala:165)
> at
> kafka.server.KafkaRequestHandlers.kafka$server$KafkaRequestHandlers$$handleProducerRequest(KafkaRequestHandle
> rs.scala:75)
> at
> kafka.server.KafkaRequestHandlers.handleProducerRequest(KafkaRequestHandlers.scala:58)
> at
> kafka.server.KafkaRequestHandlers$$anonfun$handlerFor$1.apply(KafkaRequestHandlers.scala:43)
> at
> kafka.server.KafkaRequestHandlers$$anonfun$handlerFor$1.apply(KafkaRequestHandlers.scala:43)
> at kafka.network.Processor.handle(SocketServer.scala:289)
> at kafka.network.Processor.read(SocketServer.scala:312)
> at kafka.network.Processor.run(SocketServer.scala:207)
> at java.lang.Thread.run(Thread.java:679)
> Restarting Kafka did not help. I had to manually clear out the bad state in
> Zookeeper to resolve the problem.
> The broker should not accept a message that would put it in such a bad state.
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