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我试图用加特林与卡夫卡，但每隔一段时间，出现此错误：卡夫卡错误：SLF4J：失败的toString（）类型的对象上调用[org.apache.kafka.common.Cluster]
01:32:53.933 [kafka-producer-network-thread | producer-1] DEBUG o.apache.kafka.clients.NetworkClient - Sending metadata request ClientRequest(expectResponse=true, payload=null, request=RequestSend(header={api_key=3,api_version=0,correlation_id=12,client_id=producer-1}, body={topics=[test]})) to node 1011
SLF4J: Failed toString() invocation on an object of type [org.apache.kafka.common.Cluster]
java.lang.NullPointerException
at org.apache.kafka.common.PartitionInfo.toString(PartitionInfo.java:72)
at java.lang.String.valueOf(String.java:2994)
at java.lang.StringBuilder.append(StringBuilder.java:131)
at java.util.AbstractCollection.toString(AbstractCollection.java:462)
at java.lang.String.valueOf(String.java:2994)
at java.lang.StringBuilder.append(StringBuilder.java:131)
at org.apache.kafka.common.Cluster.toString(Cluster.java:151)
at org.slf4j.helpers.MessageFormatter.safeObjectAppend(MessageFormatter.java:305)
at org.slf4j.helpers.MessageFormatter.deeplyAppendParameter(MessageFormatter.java:277)
at org.slf4j.helpers.MessageFormatter.arrayFormat(MessageFormatter.java:231)
at ch.qos.logback.classic.spi.LoggingEvent.getFormattedMessage(LoggingEvent.java:298)
at ch.qos.logback.classic.spi.LoggingEvent.prepareForDeferredProcessing(LoggingEvent.java:208)
at ch.qos.logback.core.OutputStreamAppender.subAppend(OutputStreamAppender.java:212)
at ch.qos.logback.core.OutputStreamAppender.append(OutputStreamAppender.java:103)
at ch.qos.logback.core.UnsynchronizedAppenderBase.doAppend(UnsynchronizedAppenderBase.java:88)
at ch.qos.logback.core.spi.AppenderAttachableImpl.appendLoopOnAppenders(AppenderAttachableImpl.java:48)
at ch.qos.logback.classic.Logger.appendLoopOnAppenders(Logger.java:273)
at ch.qos.logback.classic.Logger.callAppenders(Logger.java:260)
at ch.qos.logback.classic.Logger.buildLoggingEventAndAppend(Logger.java:442)
at ch.qos.logback.classic.Logger.filterAndLog_2(Logger.java:433)
at ch.qos.logback.classic.Logger.debug(Logger.java:511)
at org.apache.kafka.clients.producer.internals.Metadata.update(Metadata.java:133)
at org.apache.kafka.clients.NetworkClient.handleMetadataResponse(NetworkClient.java:313)
at org.apache.kafka.clients.NetworkClient.handleCompletedReceives(NetworkClient.java:298)
at org.apache.kafka.clients.NetworkClient.poll(NetworkClient.java:199)
at org.apache.kafka.clients.producer.internals.Sender.run(Sender.java:191)
at org.apache.kafka.clients.producer.internals.Sender.run(Sender.java:122)
at java.lang.Thread.run(Thread.java:745)
01:32:53.937 [kafka-producer-network-thread | producer-1] DEBUG o.a.k.c.producer.internals.Metadata - Updated cluster metadata version 14 to [FAILED toString()]
我不知道，如果错误与代码，但这里是我BasicSimulation.scala：
class BasicSimulation extends Simulation {
val kafkaConf = kafka
.topic("test")
.properties(
Map(
ProducerConfig.ACKS_CONFIG -> "1",
ProducerConfig.BOOTSTRAP_SERVERS_CONFIG -> "kafka:9092",
ProducerConfig.KEY_SERIALIZER_CLASS_CONFIG ->
"org.apache.kafka.common.serialization.ByteArraySerializer",
ProducerConfig.VALUE_SERIALIZER_CLASS_CONFIG ->
"org.apache.kafka.common.serialization.ByteArraySerializer"))
val scn = scenario("Kafka Test")
.feed(csv("data.csv").circular)
.exec(kafka("request")
.send("${data}".getBytes: Array[Byte]))
setUp(
scn
.inject(constantUsersPerSec(10) during(10 seconds)))
.protocols(kafkaConf)
}
这里是我的泊坞窗，compose.yml的卡夫卡相关部分：
zookeeper:
image: wurstmeister/zookeeper
ports:
- "2181:2181"
kafka:
image: wurstmeister/kafka
ports:
- "9092:9092"
depends_on:
- zookeeper
environment:
KAFKA_ADVERTISED_HOST_NAME: kafka
KAFKA_ADVERTISED_PORT: 9092
KAFKA_ZOOKEEPER_CONNECT: zookeeper:2181
KAFKA_CREATE_TOPICS: "test:1:1"
KAFKA_LOG_CLEANER_ENABLE: 'true'
volumes:
- /tmp/docker.sock:/var/run/docker.sock