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-----Original Message-----
From: odashima.tats...@sharp.co.jp [mailto:odashima.tats...@sharp.co.jp] 
Sent: 21 July 2023 06:18
To: users@kafka.apache.org
Subject: Errors related to Request METADATA failed on brokers List
kafka1:9092 disconnected

Hi, there,
I have a problem when I routinely run the following command line.
In addition, I am experiencing process hangs on one Broker at irregular
intervals, but I do not know the relevance of the error content and causing
of the error.
Has anyone had the same problem to help me?

○Kafka Broker Server Information
・3-unit cluster configuration
・Apache kafka version 3.2.1

○Commandline
bin/kafka-broker-api-versions.sh --bootstrap-server kafka1:9092,kafka2:9092,
kafka3:9092

○Error contents

WARN [LegacyAdminClient clientId=admin-1] Bootstrap broker kafka1:9092 (id:
-1 rack: null) disconnected (org.apache.kafka.clients.NetworkClient)
WARN [LegacyAdminClient clientId=admin-1] Bootstrap broker kafka1:9092 (id:
-1 rack: null) disconnected (org.apache.kafka.clients.NetworkClient)
Exception in thread "main" java.lang.RuntimeException: Request METADATA
failed on brokers List(kafka1:9092 (id: -1 rack: null))
              at
kafka.admin.BrokerApiVersionsCommand$AdminClient.sendAnyNode(BrokerApiVersio
nsCommand.scala:156)
              at
kafka.admin.BrokerApiVersionsCommand$AdminClient.findAllBrokers(BrokerApiVer
sionsCommand.scala:179)
              at
kafka.admin.BrokerApiVersionsCommand$AdminClient.awaitBrokers(BrokerApiVersi
onsCommand.scala:171)
              at
kafka.admin.BrokerApiVersionsCommand$.execute(BrokerApiVersionsCommand.scala
:61)
              at
kafka.admin.BrokerApiVersionsCommand$.main(BrokerApiVersionsCommand.scala:55
)
              at
kafka.admin.BrokerApiVersionsCommand.main(BrokerApiVersionsCommand.scala)

Best regards
Sharp Odashima

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