Jamesmahaitao commented on issue #3515:
URL: https://github.com/apache/rocketmq/issues/3515#issuecomment-975634630
> > 1. ./mqadmin updateTopic -c DefaultCluster -n 127.0.0.1:9876 -t TopicTest
>
> Check whether namesrv is connected normally through `telnet 127.0.0.1
9876`.
telnet 127.0.0.1 9876 is succeed,but when i start MQAdminStartup to run
"updateTopic -c DefaultCluster -n 127.0.0.1:9876 -t TopicTest",it sometimes
raise up an exception that:
Caused by:
org.apache.rocketmq.remoting.exception.RemotingSendRequestException: **send
request to <127.0.0.1:9876> failed**
at
org.apache.rocketmq.remoting.netty.NettyRemotingAbstract.invokeSyncImpl(NettyRemotingAbstract.java:440)
at
org.apache.rocketmq.remoting.netty.NettyRemotingClient.invokeSync(NettyRemotingClient.java:377)
at
org.apache.rocketmq.client.impl.MQClientAPIImpl.getBrokerClusterInfo(MQClientAPIImpl.java:1335)
at
org.apache.rocketmq.tools.admin.DefaultMQAdminExtImpl.examineBrokerClusterInfo(DefaultMQAdminExtImpl.java:327)
at
org.apache.rocketmq.tools.admin.DefaultMQAdminExt.examineBrokerClusterInfo(DefaultMQAdminExt.java:258)
at
org.apache.rocketmq.tools.command.CommandUtil.fetchMasterAddrByClusterName(CommandUtil.java:83)
at
org.apache.rocketmq.tools.command.topic.UpdateTopicSubCommand.execute(UpdateTopicSubCommand.java:158)
sometimes print the message:"[error] Make sure the specified clusterName
exists or the name server connected to is correct" in console.
very confused. i guess the connection have problem between broker and name
server.
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