进程僵死，strace查看停留在select函数上，此时fd是mysql连接。请问是否是服务端断开连接，客户端没有感知到？
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悬赏园豆：5
[待解决问题]
strace结果：
strace -e select -p 18170
strace: Process 18170 attached
select(7, [6], [], [], NULL
ls -alh /proc/18170/fd 结果
dr-x------ 2 root root 0 Feb 9 12:00 .
dr-xr-xr-x 9 root root 0 Jan 22 18:42 ..
lr-x------ 1 root root 64 Feb 9 12:00 0 -> /dev/null
l-wx------ 1 root root 64 Feb 9 12:00 1 -> /data0/log-data/php_mq.log
lrwx------ 1 root root 64 Feb 9 12:00 10 -> /etc/pki/nssdb/key4.db
l-wx------ 1 root root 64 Feb 9 12:00 2 -> /data0/log-data/php_mq.log
lrwx------ 1 root root 64 Feb 9 12:00 3 -> /tmp/.ZendSem.7V5AyU (deleted)
l-wx------ 1 root root 64 Feb 9 12:00 4 -> /data0/log-data/php_mq.log
l-wx------ 1 root root 64 Feb 9 12:00 5 -> /data0/log-data/php_mq.log
lrwx------ 1 root root 64 Feb 9 12:00 6 -> socket:[308698175]
lrwx------ 1 root root 64 Feb 9 12:00 7 -> socket:[308698332]
lrwx------ 1 root root 64 Feb 9 12:00 9 -> /etc/pki/nssdb/cert9.db
inode 308698332 信息
cat /proc/net/tcp | grep 308698332
410: 本地ip:8F88 远端ip:0CEA 01 00000000:00000000 02:00000631 00000000 0 0 308698332 2 ffff970f70bbae80 20 4 1 10 9
mysql超时配置
Variable_name Value
connect_timeout 10
delayed_insert_timeout 300
have_statement_timeout YES
innodb_flush_log_at_timeout 1
innodb_lock_wait_timeout 50
innodb_rollback_on_timeout OFF
interactive_timeout 7200
lock_wait_timeout 31536000
net_read_timeout 30
net_write_timeout 600
rds_trx_changes_idle_timeout 0
rds_trx_idle_timeout 0
rds_trx_readonly_idle_timeout 0
rpl_semi_sync_master_timeout 1000
rpl_stop_slave_timeout 31536000
slave_net_timeout 60
thread_pool_idle_timeout 10
wait_timeout 86400
