php - net::ERR_CONNECTION_RESET when large file takes longer than a minute

Question

I have a multipart file upload in a form with a php backend. I've set max_execution_time and max_input_time in php.ini to 180 and confirmed on the file upload that these values are set and set TimeOut 180 in Apache. I've also set

RewriteRule .* - [E=noabort:1]
RewriteRule .* - [E=noconntimeout:1]

When I upload a 250MB file on a fast connection it works fine. When I'm on a slower connection or a network link conditioner to artificially slow it down, the same file times out and on Chrome gives me net::ERR_CONNECTION_RESET after 1 minute (and 5 seconds) reliably. I've also tried other browsers with the same outcome, just different error messages.

There is no indication to an error in any log and I've tried both on http and https.

What would cause the upload connection to be reset after 1 minute?

EDIT

I've now also tried to have a simple upload form that bypasses any framework I'm using, still timeouts at 1 minute.

I've also just made a sleep script that timeouts after 2 and a half minutes, and that works, page takes around 2.5 minutes to load so I can't see how it's browser or header related.

I've also used a server with more RAM to ensure it's not related to that. I've tested on 3 different servers with different specs but all from the same CentOS 7 base.

I've now also upgraded to PHP 7.2 and updated the relevant fields again with no change in the problem.

EDIT 2 The tech stack for this isolated instance is

• Apache 2.4.6
• PHP 5.6 / 7.2 (tried both), has OPCache
• Redis 3.2.6 for session information and key / value storage (ElastiCache)
• PostgreSQL 10.2 (RDS)

Everything else in my tech stack has been removed from this test area to try and isolate the problem. EFS is on the system but in my most isolated test it's just using EBS.

EDIT 3 Here some logs from the chrome network debugger:

{"params":{"net_error":-101,"os_error":32},"phase":0,"source":    {"id":274043,"type":8},"time":"3332701830","type":69},
{"params":    {"error_lib":33,"error_reason":101,"file":"../../net/socket/socket_bio_adapter.cc","line":216,"net_error":-101,"ssl_error":1},"phase":0,"source":        {"id":274043,"type":8},"time":"3332701830","type":56},
{"phase":2,"source":{"id":274038,"type":1},"time":"3332701830","type":159},
{"phase":1,"source":    {"id":274038,"type":1},"time":"3332701830","type":164},
{"phase":1,"source":    {"id":274038,"type":1},"time":"3332701830","type":287},
{"params":    {"error_lib":33,"error_reason":101,"file":"../../net/socket/socket_bio_adapter.cc","line":113,"net_error":-101,"ssl_error":1},"phase":0,"source":    {"id":274043,"type":8},"time":"3332701830","type":55},
{"params":{"net_error":-101},"phase":2,"source":    {"id":274038,"type":1},"time":"3332701830","type":287},
{"params":{"net_error":-101},"phase":2,"source":{"id":274038,"type":1},"time":"3332701830","type":164},
{"params":{"net_error":-101},"phase":2,"source":{"id":274038,"type":1},"time":"3332701830","type":97},
{"phase":1,"source":{"id":274038,"type":1},"time":"3332701830","type":105},
{"phase":2,"source":{"id":274038,"type":1},"time":"3332701830","type":105},
{"phase":2,"source":{"id":274043,"type":8},"time":"3332701830","type":38},
{"phase":2,"source":{"id":274043,"type":8},"time":"3332701830","type":38},
{"phase":2,"source":{"id":274043,"type":8},"time":"3332701830","type":34},
{"params":{"net_error":-101},"phase":2,"source":{"id":274038,"type":1},"time":"3332701830","type":2},

Answer 1

I went through a similar problem, in my case it was related to mod_reqtimeout by adding:

RequestReadTimeout header=20-40, MinRate=500 body=20, MinRate=500

to httpd.conf did the trick! You can check the documentation here.

Hope it helps!