[Bug]: cannot set response code - headers already sent (PHP 8.3) about server

[Owirtifo]

I have the same problem.

[joshtrichards]

Since you failed to fill out the issue template, this report will likely be closed.

Also, it's critical you include the entire raw log message. Though from the looks of the snippet you provided, I suspect you have other errors before this in your log.

Wild guess: when switching PHP versions at least one required PHP extension is missing. Your Nextcloud log will have further hints.

[donniewr]

Since you failed to fill out the issue template, this report will likely be closed.

Also, it's critical you include the entire raw log message. Though from the looks of the snippet you provided, I suspect you have other errors before this in your log.

Wild guess: when switching PHP versions at least one required PHP extension is missing. Your Nextcloud log will have further hints.

I edited the post to include the full log message. There are no other errors prior to this one, and no message in the setup warnings about missing PHP extensions either.

[joshtrichards]

This line of code only gets executed after another error has occurred and been logged. Again, you didn't fill out the template. It could be as simple as your loglevel being set higher than the default, causing your logs to be missing the details to help troubleshoot your situation.

server/lib/private/legacy/OC_Template.php

Line 257 in b5275f7

header('Content-Type: text/plain; charset=utf-8');

https://docs.nextcloud.com/server/latest/admin_manual/configuration_server/logging_configuration.html#logging

Please fill out the missing elements of the form. We ask for that information to be able to help you.

[donniewr]

This line of code only gets executed after another error has occurred and been logged. Again, you didn't fill out the template. It could be as simple as your loglevel being set higher than the default, causing your logs to be missing the details to help troubleshoot your situation.

server/lib/private/legacy/OC_Template.php

Line 257 in b5275f7

header('Content-Type: text/plain; charset=utf-8');

https://docs.nextcloud.com/server/latest/admin_manual/configuration_server/logging_configuration.html#logging

Please fill out the missing elements of the form. We ask for that information to be able to help you.

I changed my logs from warnings to debug, and it seems I'm getting this error before the 'cannot set response code' message.

{"reqId":"7VxNUfIYmb5sOaIeab","level":0,"time":"2024-06-13T16:01:07+00:00","remoteAddr":"0.0.0.0","user":"--","app":"no app in context","method":"GET","url":"/s/KCgNDFe77y4KnDD/download?path=&files=","message":"Exception thrown: OCP\\Files\\ConnectionLostException","userAgent":"Mozilla/5.0 (Linux; Android 10; K) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/125.0.0.0 Mobile Safari/537.36","version":"29.0.2.2","exception":{"Exception":"OCP\\Files\\ConnectionLostException","Message":"Connection lost. Status: 1","Code":0,"Trace":[{"file":"/home/domain-cloud/htdocs/cloud.domain.com/lib/private/Files/View.php","line":461,"function":"checkConnectionStatus","class":"OC\\Files\\View","type":"->"},{"file":"/home/domain-cloud/htdocs/cloud.domain.com/lib/private/legacy/OC_Files.php","line":362,"function":"readfilePart","class":"OC\\Files\\View","type":"->"},{"file":"/home/domain-cloud/htdocs/cloud.domain.com/lib/private/legacy/OC_Files.php","line":123,"function":"getSingleFile","class":"OC_Files","type":"::"},{"file":"/home/domain-cloud/htdocs/cloud.domain.com/apps/files_sharing/lib/Controller/ShareController.php","line":492,"function":"get","class":"OC_Files","type":"::"},{"file":"/home/domain-cloud/htdocs/cloud.domain.com/lib/private/AppFramework/Http/Dispatcher.php","line":232,"function":"downloadShare","class":"OCA\\Files_Sharing\\Controller\\ShareController","type":"->"},{"file":"/home/domain-cloud/htdocs/cloud.domain.com/lib/private/AppFramework/Http/Dispatcher.php","line":138,"function":"executeController","class":"OC\\AppFramework\\Http\\Dispatcher","type":"->"},{"file":"/home/domain-cloud/htdocs/cloud.domain.com/lib/private/AppFramework/App.php","line":184,"function":"dispatch","class":"OC\\AppFramework\\Http\\Dispatcher","type":"->"},{"file":"/home/domain-cloud/htdocs/cloud.domain.com/lib/private/Route/Router.php","line":338,"function":"main","class":"OC\\AppFramework\\App","type":"::"},{"file":"/home/domain-cloud/htdocs/cloud.domain.com/lib/base.php","line":1050,"function":"match","class":"OC\\Route\\Router","type":"->"},{"file":"/home/domain-cloud/htdocs/cloud.domain.com/index.php","line":49,"function":"handleRequest","class":"OC","type":"::"}],"File":"/home/domain-cloud/htdocs/cloud.domain.com/lib/private/Files/View.php","Line":474,"CustomMessage":"Exception thrown: OCP\\Files\\ConnectionLostException"},"id":"666b19c7609"

[donniewr]

The error only occurs with video files over 5MB. I've tested this on a different server and a fresh NC install.

I'm not sure what else I can fill in on the form, the error is easy to reproduce.