升级到2.1后使用spring-cloud stream和kafka的项目打开的文件太多

Question

在使用Multibinder，kafka(2个代理）和rabbit(1个代理）的项目上升级到spring cloud Stream2.1后，我们面临着打开文件太多的问题。

打开的文件数量一直增长到操作系统(RedHat7.3)定义的限制。

{
"name": "process.files.open",
"description": "The open file descriptor count",
"baseUnit": "files",
"measurements": [
{
"statistic": "VALUE",
"value": 1686
}

]
}

 +- org.springframework.cloud:spring-cloud-stream-binder-kafka-core:jar:2.0.0.RELEASE:compile
[INFO] |  |  \- org.springframework.integration:spring-integration-kafka:jar:3.0.3.RELEASE:compile
[INFO] |  +- org.apache.kafka:kafka-clients:jar:1.0.2:compile
[INFO] |  |  +- org.lz4:lz4-java:jar:1.4:compile
[INFO] |  |  \- org.xerial.snappy:snappy-java:jar:1.1.4:compile
[INFO] |  \- org.springframework.kafka:spring-kafka:jar:2.1.10.RELEASE:compile

在第一次尝试中，我想用kafka-clients 1.0.2来尝试spring cloud Stream2.1，根据文档，这是可能的，但我面临一个问题。下面是我的带有排除的maven配置：

<dependency>
    <groupId>org.springframework.cloud</groupId>
    <artifactId>spring-cloud-stream-binder-kafka</artifactId>
    <exclusions>
        <exclusion>
            <groupId>org.apache.kafka</groupId>
            <artifactId>kafka-clients</artifactId>
        </exclusion>
        <exclusion>
            <groupId>org.springframework.kafka</groupId>
            <artifactId>spring-kafka</artifactId>
        </exclusion>
        <exclusion>
            <groupId>org.springframework.integration</groupId>
            <artifactId>spring-integration-kafka</artifactId>
        </exclusion>
    </exclusions>
</dependency>
<dependency>
    <groupId>org.apache.kafka</groupId>
    <artifactId>kafka-clients</artifactId>
    <version>1.0.2</version>
</dependency>
<dependency>
    <groupId>org.springframework.kafka</groupId>
    <artifactId>spring-kafka</artifactId>
    <version>2.2.5.RELEASE</version>
</dependency>
<dependency>
    <groupId>org.springframework.integration</groupId>
    <artifactId>spring-integration-kafka</artifactId>
    <version>3.1.0.RELEASE</version>
</dependency>

我有以下错误：

java.lang.NoSuchMethodError: org.apache.kafka.clients.consumer.Consumer.poll(Ljava/time/Duration;)Lorg/apache/kafka/clients/consumer/ConsumerRecords;
    at org.springframework.kafka.listener.KafkaMessageListenerContainer$ListenerConsumer.pollAndInvoke(KafkaMessageListenerContainer.java:741)
    at org.springframework.kafka.listener.KafkaMessageListenerContainer$ListenerConsumer.run(KafkaMessageListenerContainer.java:698)
    at java.base/java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:515)
    at java.base/java.util.concurrent.FutureTask.run$$$capture(FutureTask.java:264)
    at java.base/java.util.concurrent.FutureTask.run(FutureTask.java)
    at java.base/java.lang.Thread.run(Thread.java:834)

关于打开的文件太多以及如何诊断有什么想法吗？如何使用降级的Kafka客户端进行测试？

谢谢你的帮助。

Answer 1

java.lang.nosuchmethoderror：org.apache.kafka.clients.consumer.consumer.poll（ljava/time/duration；）lorg/apache/kafka/clients/consumerrecords；

Spring-Kafka2.2.x需要2.0.1 kafka-clients或更高版本。