A：
• 现象：
"description": "Cannot do an IO operation(e.g. network IO error, file IO error)",
"details": "I/O error on POST request for \"http://127.0.0.1:7758/console/establish\":\
Connect to 127.0.0.1:7758 [/127.0.0.1] failed: Connection refused;
nested exception is org.apache.http.conn.HttpHostConnectException: Connect to 127.0.0
.1:7758 [/127.0.0.1] \
failed: Connection refused","$$hashKey": "object:1344"

• 解决方案：
删除/var/lib/zstack/pickledb/下面的consoleProxy文件，再次重连控制台代理。