farmmamba created HDFS-17028:
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             Summary: RBF: Optimize toString method of class ConnectionContext
                 Key: HDFS-17028
                 URL: https://issues.apache.org/jira/browse/HDFS-17028
             Project: Hadoop HDFS
          Issue Type: Improvement
          Components: rbf
    Affects Versions: 3.3.4
            Reporter: farmmamba


When we change the log level of RouterRpcClient from INFO to DEBUG to figure 
out which connection an user is using. We found logs below:

 
{code:java}
2023-05-29 09:46:09,033 DEBUG 
org.apache.hadoop.hdfs.server.federation.router.RouterRpcClient: User someone 
NN ANN:8020 is using connection 
ClientNamenodeProtocolTranslatorPB@ANN/ANN_IP:8020x3
2023-05-29 09:46:09,037 DEBUG 
org.apache.hadoop.hdfs.server.federation.router.RouterRpcClient: User someone 
NN ANN:8020 is using connection 
ClientNamenodeProtocolTranslatorPB@ANN/ANN_IP:8020x1
2023-05-29 09:46:09,037 DEBUG 
org.apache.hadoop.hdfs.server.federation.router.RouterRpcClient: User someone 
NN ANN:8020 is using connection 
ClientNamenodeProtocolTranslatorPB@ANN/ANN_IP:8020x2
2023-05-29 09:46:09,037 DEBUG 
org.apache.hadoop.hdfs.server.federation.router.RouterRpcClient: User someone 
NN ANN:8020 is using connection 
ClientNamenodeProtocolTranslatorPB@ANN/ANN_IP:8020x3
2023-05-29 09:46:09,042 DEBUG 
org.apache.hadoop.hdfs.server.federation.router.RouterRpcClient: User someone 
NN ANN:8020 is using connection 
ClientNamenodeProtocolTranslatorPB@ANN/ANN_IP:8020x0 {code}
It seems not very clear for us to figure out which connection user is using. 
Therefore, i think we should optimize the toString method of class 
ConnectionContext.



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