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- 【TiDB 版本】:V3.0.5
- 【问题描述】:系统centos7.7 内核版本4.4.202
用ansible的方式安装集群,初始化系统环境,修改内核参数ansible-playbook bootstrap.yml
Ansible FAILED! => playbook: bootstrap.yml; TASK: check_system_static : Preflight check - Check if the operating system supports EPOLLEXCLUSIVE; message: {“changed”: true, “cmd”: “/home/tidb/deploy/epollexclusive”, “delta”: “0:00:00.007020”, “end”: “2019-10-16 10:29:15.858494”, “msg”: “non-zero return code”, “rc”: 1, “start”: “2019-10-16 10:29:15.851474”, “stderr”: “”, “stderr_lines”: [], “stdout”: “epoll_ctl with EPOLLEXCLUSIVE | EPOLLONESHOT succeeded. This is evidence of no EPOLLEXCLUSIVE support. Not using epollex polling engine.False: epollexclusive is not available”, “stdout_lines”: [“epoll_ctl with EPOLLEXCLUSIVE | EPOLLONESHOT succeeded. This is evidence of no EPOLLEXCLUSIVE support. Not using epollex polling engine.False: epollexclusive is not available”]}
这个EPOLLEXCLUSIVE主要起什么作用,除了升级内核版本,还有其他解决办法吗?