kafka错误集锦

javax.management.InstanceAlreadyExistsException: kafka.consumer:type=FetchRequestAndResponseMetrics,name=FetchRes
ponseSize,clientId=iot

在CloudearManager中安装kafka时，报了这样一个错：

[Kafka Server 92], Fatal error during KafkaServer startup. Prepare to shutdown
java.lang.OutOfMemoryError: Java heap space
    at java.nio.HeapByteBuffer.<init>(HeapByteBuffer.java:57)
    at java.nio.ByteBuffer.allocate(ByteBuffer.java:331)
    at kafka.log.SkimpyOffsetMap.<init>(OffsetMap.scala:45)
    at kafka.log.LogCleaner$CleanerThread.<init>(LogCleaner.scala:214)
    at kafka.log.LogCleaner$$anonfun$3.apply(LogCleaner.scala:105)
    at kafka.log.LogCleaner$$anonfun$3.apply(LogCleaner.scala:105)
    at scala.collection.TraversableLike$$anonfun$map$1.apply(TraversableLike.scala:234)
    at scala.collection.TraversableLike$$anonfun$map$1.apply(TraversableLike.scala:234)
    at scala.collection.immutable.Range.foreach(Range.scala:160)
    at scala.collection.TraversableLike$class.map(TraversableLike.scala:234)
    at scala.collection.AbstractTraversable.map(Traversable.scala:104)
    at kafka.log.LogCleaner.<init>(LogCleaner.scala:105)
    at kafka.log.LogManager.<init>(LogManager.scala:78)
    at kafka.log.LogManager$.apply(LogManager.scala:598)
    at kafka.server.KafkaServer.startup(KafkaServer.scala:215)
    at kafka.server.KafkaServerStartable.startup(KafkaServerStartable.scala:44)
    at kafka.Kafka$.main(Kafka.scala:65)
    at com.cloudera.kafka.wrap.Kafka$.main(Kafka.scala:76)
    at com.cloudera.kafka.wrap.Kafka.main(Kafka.scala)

解决办法，就是在ClouderaManager中设定Java Heap Size of Broker的值，将50M改为256M，如下图：