spark-shell 报 WARN ipc.Client: Failed to connect to server: xxx/xxx.xxx.xx.xx:8032: retries get failed due to exceeded maximum allowed retries number: 0 java.net.ConnectException: Connection refused
CAUSE:
In Yarn configs -> custom yarn-site.xml, you might have configuration for rm1 as resource-manager-A. This is the reason first attempt to connect was made to this server and then got connection refused. Then it goes to active resource manager which is resource-manager-B. This warning is not seen when resource-manager-A is active, because the property rm1 pointing to this server, first connect attempt is successful. First connection attempt is always made to the resource manager which is specified in rm1.
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