Kafka 集群启动警告 |无法更新 IO 指标 |访问DeniedException：/proc/self/io

问：

我在 OEL8 服务器上有一个由 2 节点 Kafka KRaft 集群组成的设置，详细信息如下：

Kafka 版本：kafka_2.13-3.4.0 Java 版本：OpenJDK 17

vmhost1：server.properties

process.roles=broker,controller
node.id=1
controller.quorum.voters=1@vmhost1:9093,2@vmhost2:9093
listeners=PLAINTEXT://vmhost1:9092,CONTROLLER://vmhost1:9093
advertised.listeners=PLAINTEXT://vmhost1:9092

vmhost2：server.properties

process.roles=broker,controller
node.id=2
controller.quorum.voters=1@vmhost1:9093,2@vmhost2:9093
listeners=PLAINTEXT://vmhost2:9092,CONTROLLER://vmhost2:9093
advertised.listeners=PLAINTEXT://vmhost2:9092

ls -la /proc/self/io
-r--------. 1 kafka kafkagrp 0 Nov 10 01:18 /proc/self/io

启动 Kafka 服务器后，我遇到了以下错误。

[kafka@vmhost1 kafka_2.13-3.4.0]$ ./bin/kafka-server-start.sh ./config/kraft/server.properties
[2023-11-10 00:56:43,631] INFO Registered kafka:type=kafka.Log4jController MBean (kafka.utils.Log4jControllerRegistration$)
[2023-11-10 00:56:43,902] INFO Setting -D jdk.tls.rejectClientInitiatedRenegotiation=true to disable client-initiated TLS renegotiation (org.apache.zookeeper.common.X509Util)
[2023-11-10 00:56:44,041] WARN Unable to update IO metrics (kafka.server.BrokerServer)
java.nio.file.AccessDeniedException: /proc/self/io
        at java.base/sun.nio.fs.UnixException.translateToIOException(UnixException.java:90)
        at java.base/sun.nio.fs.UnixException.rethrowAsIOException(UnixException.java:106)
        at java.base/sun.nio.fs.UnixException.rethrowAsIOException(UnixException.java:111)
        at java.base/sun.nio.fs.UnixFileSystemProvider.newByteChannel(UnixFileSystemProvider.java:218)
        at java.base/java.nio.file.Files.newByteChannel(Files.java:380)
        at java.base/java.nio.file.Files.newByteChannel(Files.java:432)
        at java.base/java.nio.file.spi.FileSystemProvider.newInputStream(FileSystemProvider.java:422)
        at java.base/java.nio.file.Files.newInputStream(Files.java:160)
        at java.base/java.nio.file.Files.newBufferedReader(Files.java:2922)
        at java.base/java.nio.file.Files.readAllLines(Files.java:3412)
        at java.base/java.nio.file.Files.readAllLines(Files.java:3453)
        at kafka.metrics.LinuxIoMetricsCollector.updateValues(LinuxIoMetricsCollector.scala:71)
        at kafka.metrics.LinuxIoMetricsCollector.usable(LinuxIoMetricsCollector.scala:91)
        at kafka.server.KafkaBroker.$init$(KafkaBroker.scala:106)
        at kafka.server.BrokerServer.<init>(BrokerServer.scala:74)
        at kafka.server.KafkaRaftServer.<init>(KafkaRaftServer.scala:80)
        at kafka.Kafka$.buildServer(Kafka.scala:85)
        at kafka.Kafka$.main(Kafka.scala:93)
        at kafka.Kafka.main(Kafka.scala)
[2023-11-10 00:56:44,050] INFO Registered signal handlers for TERM, INT, HUP (org.apache.kafka.common.utils.LoggingSignalHandler)
[2023-11-10 00:56:44,053] INFO Starting controller (kafka.server.ControllerServer)
[2023-11-10 00:56:44,064] WARN Unable to update IO metrics (kafka.server.ControllerServer)
java.nio.file.AccessDeniedException: /proc/self/io
        at java.base/sun.nio.fs.UnixException.translateToIOException(UnixException.java:90)
        at java.base/sun.nio.fs.UnixException.rethrowAsIOException(UnixException.java:106)
        at java.base/sun.nio.fs.UnixException.rethrowAsIOException(UnixException.java:111)
        at java.base/sun.nio.fs.UnixFileSystemProvider.newByteChannel(UnixFileSystemProvider.java:218)
        at java.base/java.nio.file.Files.newByteChannel(Files.java:380)
        at java.base/java.nio.file.Files.newByteChannel(Files.java:432)
        at java.base/java.nio.file.spi.FileSystemProvider.newInputStream(FileSystemProvider.java:422)
        at java.base/java.nio.file.Files.newInputStream(Files.java:160)
        at java.base/java.nio.file.Files.newBufferedReader(Files.java:2922)
        at java.base/java.nio.file.Files.readAllLines(Files.java:3412)
        at java.base/java.nio.file.Files.readAllLines(Files.java:3453)
        at kafka.metrics.LinuxIoMetricsCollector.updateValues(LinuxIoMetricsCollector.scala:71)
        at kafka.metrics.LinuxIoMetricsCollector.usable(LinuxIoMetricsCollector.scala:91)
        at kafka.server.ControllerServer.startup(ControllerServer.scala:142)
        at kafka.server.KafkaRaftServer.$anonfun$startup$1(KafkaRaftServer.scala:98)
        at kafka.server.KafkaRaftServer.$anonfun$startup$1$adapted(KafkaRaftServer.scala:98)
        at scala.Option.foreach(Option.scala:437)
        at kafka.server.KafkaRaftServer.startup(KafkaRaftServer.scala:98)
        at kafka.Kafka$.main(Kafka.scala:115)
        at kafka.Kafka.main(Kafka.scala)

我尝试过更改权限，但即使使用 sudo 也是不允许的

chmod 640 /proc/self/io
chmod: changing permissions of ‘/proc/self/io’: Operation not permitted

请帮助我提供解决方案或一些建议。