mongodb偶尔会出现Connection refused

[hanchikang]

偶尔出现报错：unable to establish connection tcp://127.0.0.1:6012: Connection refused (111)

PHP版本：7.4.28

swoole：

Swoole => enabled
Author => Swoole Team <team@swoole.com>
Version => 4.8.5
Built => May  9 2022 18:04:04
coroutine => enabled with boost asm context
epoll => enabled
eventfd => enabled
signalfd => enabled
cpu_affinity => enabled
spinlock => enabled
rwlock => enabled
openssl => OpenSSL 1.0.2k-fips  26 Jan 2017
http2 => enabled
curl-native => enabled
pcre => enabled
zlib => 1.2.7
mutex_timedlock => enabled
pthread_barrier => enabled
futex => enabled
mysqlnd => enabled
async_redis => enabled

Directive => Local Value => Master Value
swoole.enable_coroutine => On => On
swoole.enable_library => On => On
swoole.enable_preemptive_scheduler => Off => Off
swoole.display_errors => On => On
swoole.use_shortname => Off => Off
swoole.unixsock_buffer_size => 8388608 => 8388608

gotask版本：v2.2.9

[hanchikang]

ps看进程时间，应该是go进程突然就重启了，导致失败的

[hanchikang]

已经解决：是因为系统允许打开最大文件数不够，链接多了，就导致上述问题。
查看方式：ulimit -n