I am running Apache 2.4 to serve Nextcloud and I occasionally get the error
[proxy_fcgi:error] cloud.my-domain.tld: (70008)Partial results are valid but processing is incomplete: AH01075: Error dispatching request to : (reading input brigade)
All solutions I have found so far indicated that mod_reqtimeout had been the problem. However, in my case mod_reqtimeout is not enabled and not (statically) built into Apache.
What can cause this error and/or how to debug the root cause? I already increased the log level to "debug" but do not see any suspicious.
The log:
Mar 13 14:47:50 server apache[742310]: [proxy:debug] cloud.my-domain.tld: AH01143: Running scheme unix handler (attempt 0)
Mar 13 14:47:50 server apache[742310]: [proxy_fcgi:debug] cloud.my-domain.tld: AH01076: url: fcgi://php//var/www/my-domain.tld/nextcloud/ocs/v2.php proxyname: (null) proxyport: 0
Mar 13 14:47:50 server apache[742310]: [proxy_fcgi:debug] cloud.my-domain.tld: AH01078: serving URL fcgi://php//var/www/my-domain.tld/nextcloud/ocs/v2.php
Mar 13 14:47:50 server apache[742310]: [proxy:debug] cloud.my-domain.tld: AH00942: FCGI: has acquired connection for (php:8000)
Mar 13 14:47:50 server apache[742310]: [proxy:debug] cloud.my-domain.tld: AH00944: connecting fcgi://php//var/www/my-domain.tld/nextcloud/ocs/v2.php to php:8000
Mar 13 14:47:50 server apache[742310]: [proxy:debug] cloud.my-domain.tld: AH02545: fcgi: has determined UDS as /run/php-fpm/www.sock
Mar 13 14:47:50 server apache[742310]: [proxy:debug] cloud.my-domain.tld: AH00947: connected //var/www/my-domain.tld/nextcloud/ocs/v2.php to httpd-UDS:0
Mar 13 14:47:50 server apache[742310]: [proxy:debug] cloud.my-domain.tld: AH02823: FCGI: connection established with Unix domain socket /run/php-fpm/www.sock (php:8000)
Mar 13 14:47:50 server apache[742310]: [proxy:debug] cloud.my-domain.tld: AH00943: FCGI: has released connection for (php:8000)
Mar 13 14:47:50 server apache[742310]: [proxy:debug] cloud.my-domain.tld: AH01143: Running scheme unix handler (attempt 0)
Mar 13 14:47:50 server apache[742310]: [proxy_fcgi:debug] cloud.my-domain.tld: AH01076: url: fcgi://php//var/www/my-domain.tld/nextcloud/ocs/v2.php proxyname: (null) proxyport: 0
Mar 13 14:47:50 server apache[742310]: [proxy_fcgi:debug] cloud.my-domain.tld: AH01078: serving URL fcgi://php//var/www/my-domain.tld/nextcloud/ocs/v2.php
Mar 13 14:47:50 server apache[742310]: [proxy:debug] cloud.my-domain.tld: AH00942: FCGI: has acquired connection for (php:8000)
Mar 13 14:47:50 server apache[742310]: [proxy:debug] cloud.my-domain.tld: AH00944: connecting fcgi://php//var/www/my-domain.tld/nextcloud/ocs/v2.php to php:8000
Mar 13 14:47:50 server apache[742310]: [proxy:debug] cloud.my-domain.tld: AH02545: fcgi: has determined UDS as /run/php-fpm/www.sock
Mar 13 14:47:50 server apache[742310]: [proxy:debug] cloud.my-domain.tld: AH00947: connected //var/www/my-domain.tld/nextcloud/ocs/v2.php to httpd-UDS:0
Mar 13 14:47:50 server apache[742310]: [proxy:debug] cloud.my-domain.tld: AH02823: FCGI: connection established with Unix domain socket /run/php-fpm/www.sock (php:8000)
Mar 13 14:47:50 server apache[742310]: [proxy:debug] cloud.my-domain.tld: AH01143: Running scheme unix handler (attempt 0)
Mar 13 14:47:50 server apache[742310]: [proxy_fcgi:debug] cloud.my-domain.tld: AH01076: url: fcgi://php//var/www/my-domain.tld/nextcloud/remote.php proxyname: (null) proxyport: 0
Mar 13 14:47:50 server apache[742310]: [proxy_fcgi:debug] cloud.my-domain.tld: AH01078: serving URL fcgi://php//var/www/my-domain.tld/nextcloud/remote.php
Mar 13 14:47:50 server apache[742310]: [proxy:debug] cloud.my-domain.tld: AH00942: FCGI: has acquired connection for (php:8000)
Mar 13 14:47:50 server apache[742310]: [proxy:debug] cloud.my-domain.tld: AH00944: connecting fcgi://php//var/www/my-domain.tld/nextcloud/remote.php to php:8000
Mar 13 14:47:50 server apache[742310]: [proxy:debug] cloud.my-domain.tld: AH02545: fcgi: has determined UDS as /run/php-fpm/www.sock
Mar 13 14:47:50 server apache[742310]: [proxy:debug] cloud.my-domain.tld: AH00947: connected //var/www/my-domain.tld/nextcloud/remote.php to httpd-UDS:0
Mar 13 14:47:50 server apache[742310]: [proxy:debug] cloud.my-domain.tld: AH02823: FCGI: connection established with Unix domain socket /run/php-fpm/www.sock (php:8000)
Mar 13 14:47:50 server apache[742310]: [proxy:debug] cloud.my-domain.tld: AH00943: FCGI: has released connection for (php:8000)
Mar 13 14:47:50 server apache[742310]: [proxy:debug] cloud.my-domain.tld: AH00943: FCGI: has released connection for (php:8000)
Mar 13 14:48:08 server apache[742310]: [proxy:debug] cloud.my-domain.tld: AH00943: FCGI: has released connection for (php:8000)
Mar 13 14:48:09 server apache[742310]: [proxy:debug] cloud.my-domain.tld: AH01143: Running scheme unix handler (attempt 0)
Mar 13 14:48:09 server apache[742310]: [proxy_fcgi:debug] cloud.my-domain.tld: AH01076: url: fcgi://php//var/www/my-domain.tld/nextcloud/remote.php proxyname: (null) proxyport: 0
Mar 13 14:48:09 server apache[742310]: [proxy_fcgi:debug] cloud.my-domain.tld: AH01078: serving URL fcgi://php//var/www/my-domain.tld/nextcloud/remote.php
Mar 13 14:48:09 server apache[742310]: [proxy:debug] cloud.my-domain.tld: AH00942: FCGI: has acquired connection for (php:8000)
Mar 13 14:48:09 server apache[742310]: [proxy:debug] cloud.my-domain.tld: AH00944: connecting fcgi://php//var/www/my-domain.tld/nextcloud/remote.php to php:8000
Mar 13 14:48:09 server apache[742310]: [proxy:debug] cloud.my-domain.tld: AH02545: fcgi: has determined UDS as /run/php-fpm/www.sock
Mar 13 14:48:09 server apache[742310]: [proxy:debug] cloud.my-domain.tld: AH00947: connected //var/www/my-domain.tld/nextcloud/remote.php to httpd-UDS:0
Mar 13 14:48:09 server apache[742310]: [proxy:debug] cloud.my-domain.tld: AH02823: FCGI: connection established with Unix domain socket /run/php-fpm/www.sock (php:8000)
Mar 13 14:51:53 server apache[742310]: [proxy_fcgi:error] cloud.my-domain.tld: (70008)Partial results are valid but processing is incomplete: AH01075: Error dispatching request to : (reading input brigade)
Mar 13 14:51:53 server apache[742310]: [proxy:debug] cloud.my-domain.tld: AH00943: FCGI: has released connection for (php:8000)
apache2ctl -M returns
server ~ # apache2ctl -M
Loaded Modules:
core_module (static)
so_module (static)
http_module (static)
mpm_event_module (static)
alias_module (shared)
auth_basic_module (shared)
authn_core_module (shared)
authn_file_module (shared)
authz_core_module (shared)
authz_host_module (shared)
authz_user_module (shared)
autoindex_module (shared)
deflate_module (shared)
dir_module (shared)
env_module (shared)
filter_module (shared)
headers_module (shared)
http2_module (shared)
include_module (shared)
logio_module (shared)
mime_module (shared)
negotiation_module (shared)
proxy_module (shared)
proxy_fcgi_module (shared)
proxy_http_module (shared)
proxy_http2_module (shared)
proxy_wstunnel_module (shared)
rewrite_module (shared)
setenvif_module (shared)
socache_shmcb_module (shared)
ssl_module (shared)
unixd_module (shared)
Potentially relevant parts from the Apache config
LogLevel notice proxy:debug proxy_fcgi:debug
# ...
<IfModule mpm_event_module>
StartServers 3
MinSpareThreads 15
MaxSpareThreads 80
ThreadsPerChild 25
MaxRequestWorkers 400
MaxConnectionsPerChild 0
</IfModule>
# ...
<IfModule !mod_php8.c>
<IfModule proxy_fcgi_module>
<IfModule setenvif_module>
SetEnvIfNoCase ^Authorization$ "(.+)" HTTP_AUTHORIZATION=$1
</IfModule>
<Proxy "fcgi://php/">
ProxySet flushpackets=auto flushwait=10 timeout=1200
</Proxy>
<FilesMatch ".+\.ph(?:ar|p|tml)$">
<If "-f %{SCRIPT_FILENAME}">
SetHandler "proxy:unix:/run/php-fpm/www.sock|fcgi://php/"
</If>
</FilesMatch>
<FilesMatch ".+\.phps$">
Require all denied
</FilesMatch>
<FilesMatch "^\.ph(?:ar|p|ps|tml)$">
Require all denied
</FilesMatch>
</IfModule>
</IfModule>
Potentially relevant parts from the PHP FPM config
error_log = syslog
log_level = notice
; This value must high enough to serve the maximum number of simultaneous
; Apache request plus some slack for CLI requests
; Apache spawns at most 16 processes (see ServerLimit) with 25 worker treads each
; (see ThreadsPerChild) and hence can serve at most 400 requests
; (see MaxRequestWorkers).
; Here we round up to 420.
pm.max_children = 420
pm.start_servers = 20
pm.min_spare_servers = 15
pm.max_spare_servers = 25
Potentially relevant parts from the php.ini for FPM:
max_execution_time = 1200
max_input_time = 1200
post_max_size = 1638M
upload_max_filesize = 1228M
max_file_uploads = 512
