集群本来正常运行，突然有台机器上所有brick都掉线了，尝试重启volume、重启glusterd、重启机器均无法解决
该机器上glusterd所用24007端口telnet不通，netstat查看有很多close_wait状态的网络链接
glusterd.log中有很多类似如下的内容：
[2021-10-12 06:46:51.476380] C [rpc-clnt-ping.c:155:rpc_clnt_ping_timer_expired] 0-vol_test2-client-2: server 192.168.10.10:24007 has not responded in the last 42 seconds, disconnecting.
[2021-10-14 03:53:24.209823] W [glusterd-locks.c:586:glusterd_mgmt_v3_lock] (-->/usr/lib64/glusterfs/6.6/xlator/mgmt/glusterd.so(+0x42f77) [0x7fbab8e79f77] -->/usr/lib64/glusterfs/6.6/xlator/mgmt/glusterd.so(+0x32ff0) [0x7fbab8e69ff0] -->/usr/lib64/glusterfs/6.6/xlator/mgmt/glusterd.so(+0xecc3d) [0x7fbab8f23c3d] ) 0-management: Lock for vol_test2 held by 534a5c50-82c6-421e-b465-d3224eada92f
[2021-10-14 03:53:24.209850] E [MSGID: 106118] [glusterd-op-sm.c:4133:glusterd_op_ac_lock] 0-management: Unable to acquire lock for vol_test2
[2021-10-14 03:53:24.209904] E [MSGID: 106376] [glusterd-op-sm.c:8150:glusterd_op_sm] 0-management: handler returned: -1
[2021-10-14 03:53:24.291071] I [MSGID: 106499] [glusterd-handler.c:4429:__glusterd_handle_status_volume] 0-management: Received status volume req for volume vol_test2
[2021-10-14 03:53:24.347063] W [glusterd-locks.c:807:glusterd_mgmt_v3_unlock] (-->/usr/lib64/glusterfs/6.6/xlator/mgmt/glusterd.so(+0x42f77) [0x7fbab8e79f77] -->/usr/lib64/glusterfs/6.6/xlator/mgmt/glusterd.so(+0x32c95) [0x7fbab8e69c95] -->/usr/lib64/glusterfs/6.6/xlator/mgmt/glusterd.so(+0xed3b3) [0x7fbab8f243b3] ) 0-management: Lock for vol vol_test2 not held
[2021-10-14 03:53:24.347091] E [MSGID: 106117] [glusterd-op-sm.c:4189:glusterd_op_ac_unlock] 0-management: Unable to release lock for vol_test2
集群规模：18个节点,600多个volume
glusterfs版本：6.12
操作系统版本：CentOS 7
