生产环境 OceanBase_CE-v4.1.8+obproxy-ce-4.3.2
低频的请求，业务客户端偶尔会报
‘ClearUp’=‘0’}",“Param”:“tUfIS3dnI4LBzGrkmNMr3Aoo9W/04p0qeowkPqelxy4evdiytcCUR7UbZ9uwTFeZTABZ2AutOp5rYqVA/qXPKq71gwkJY3ZJ”,“ErrorMsg”:"Communications link failure \n\nThe last packet successfully received from the server was 380 milliseconds ago. The last packet sent successfully to the server was 383 milliseconds
proxy会报如下错误：
2025-01-15 20:05:06.006067,undefined,clusterName1:acd:dbname3db,OB_MYSQL,OB_MYSQL_COM_PING,failed,-4016,0us,0us,0us,0us,Y0-00007F8951BA96F0,10.57.194.51:37496,0,Connect error,
2025-01-15 20:05:06.006393,undefined,clusterName1:acd:dbname1db,OB_MYSQL,OB_MYSQL_COM_PING,failed,-4016,0us,0us,0us,0us,Y0-00007F8951C07E90,10.57.194.51:37484,0,Connect error,
2025-01-15 20:05:06.405692,undefined,clusterName1:acd:dbname4db,OB_MYSQL,OB_MYSQL_COM_PING,failed,-4016,0us,0us,0us,0us,Y0-00007F89517DB0B0,10.57.194.51:37502,0,Connect error,
2025-01-15 20:05:06.406132,undefined,clusterName1:acd:dbname2db,OB_MYSQL,OB_MYSQL_COM_PING,failed,-4016,0us,0us,0us,0us,Y0-00007F895177A2B0,10.57.194.51:37490,0,Connect error,
2025-01-15 20:05:48.181100,undefined,clusterName1:acd:dbname5db,OB_MYSQL,OB_MYSQL_COM_QUERY,OTHERS,failed,-4016,select%0A %0A id%0A %2C%0A req_md5%2C%0A xxx%2C%0A xxx%2C%0A xxx%2C%0A xxxx%2C%0A xxxxx%0A %0A from xxxxxx%0A where req_md5 = ‘318d8e6c3b980f1f8dd286b699e8b51b’,0us,0us,0us,0us,Y0-00007F8951B79430,xxxxx:35438,0,Connect error,
observer端有类似timeout的信息：
xxxxxx timeout=120s
疑问：
1、proxy的连接中断了，原因还不明确