HAproxy turns on multicore part 503

in the regular configuration, if a single core is used for stable operation, an occasional 503 occurs when the multi-core mode is enabled, and there is no X-Server response header information.

global
    daemon
    -sharp  503
    -sharp nbproc 12
    log 127.0.0.1 local0
defaults
    log global
    mode http
    maxconn 1000000
    timeout tunnel 3600s
    timeout connect 3s
    timeout client 60s
    timeout server 60s
listen stats
  bind :9000
  mode http
  stats enable
  stats realm Haproxy\ Statistics
  stats uri /haproxy_stats
  stats auth admin:123
frontend im-proxy
    log global
    bind *:80
    default_backend server
backend server
    server web1 127.0.0.1:7002 
    http-response set-header X-Server web1

Haproxy

Jan.27,2022

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MySQL Query : SELECT * FROM `codeshelper`.`v9_news` WHERE status=99 AND catid='6' ORDER BY rand() LIMIT 5
MySQL Error : Disk full (/tmp/#sql-temptable-64f5-1b38404-2c0dd.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1b38404-2c0dd.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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