刘珍 created IOTDB-5323:
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             Summary: [metric] Collects the number of open file handles of  
DataNode/ConfigNode
                 Key: IOTDB-5323
                 URL: https://issues.apache.org/jira/browse/IOTDB-5323
             Project: Apache IoTDB
          Issue Type: Improvement
            Reporter: 刘珍
            Assignee: Hongyin Zhang


metric 需支持 采集ConfigNode/DataNode 进程打开的文件句柄数,以监控是否有文件句柄泄露。
filehandle_num=`ssh ${u_name}@${node} "lsof -p ${pid} | wc -l"`




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