Swoole\ Process::__construct (): Swoole creation child process reported an error

SwooleProcess::__construct (): handle 10003462 exceed 10000000 in xxxxxxxxx
what"s wrong with this? Exceed the limit? But I only opened about 10 sub-processes,
my version: PHP 7.2.7 swoole 4.0.1

Mar.31,2021
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-64f5-1b37a17-2c0d9.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1b37a17-2c0d9.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
Need Help?