[BUG] upstream prematurely closed connection while reading upstream (Nextcloud bigdata download)

[Ghosty01]

What happened?

Hey :),

when i try to download big files over nextcloud this happens the stream/download got disconnedted (dee log)

How to reproduce?

bunnkerweb 1.5.1.2 revers proxy -> linuxserver/nextcloud, share big data more then 1GB

Configuration file(s) (yaml or .env)

#Nextcloud
      - xxx_USE_MODSECURITY=no
      - xxx_USE_MODSECURITY_CRS=no
      - xxx_REVERSE_PROXY_URL=/
      - xxx_REVERSE_PROXY_HOST=http://nextcloud
      - xxx_USE_LIMIT_REQ=no
      - xxx_USE_LIMIT_CONN=no
      - xxx_MAX_CLIENT_SIZE=20G
      - xxx_ALLOWED_METHODS=
GET|POST|HEAD|COPY|DELETE|LOCK|MKCOL|MOVE|PROPFIND|PROPPATCH|PUT|UNLOCK|OPTIONS
      - xxx_X_FRAME_OPTIONS=SAMEORIGIN
      - xxx_BAD_BEHAVIOR_STATUS_CODES=400 401 403 405 444
      - xxx_REVERSE_PROXY_CONNECT_TIMEOUT=1200s
      - xxx_REVERSE_PROXY_READ_TIMEOUT=1200s
      - xxx_REVERSE_PROXY_SEND_TIMEOUT=1200s
	  
#MAIN
	  - SERVE_FILES=no
      - DISABLE_DEFAULT_SERVER=yes
	  - USE_CLIENT_CACHE=yes
      - USE_GZIP=yes
      - USE_REVERSE_PROXY=yes
      - USE_REAL_IP=yes
      - REAL_IP_HEADER=CF-Connecting-IP
      - REAL_IP_RECURSIVE=yes
      - REAL_IP_FROM_URLS=https://www.cloudflare.com/ips-v4/ https://www.cloudflare.com/ips-v6

Relevant log output

2025/01/14 22:30:14 [error] 156#156: *786 upstream prematurely closed connection while reading upstream, client: xxx, server: xxx, request: "GET /s/dowmWB66n57Lmxa/download?path=%2F&files=<FILE>&downloadStartSecret=p1cvpdcr1q8 HTTP/2.0", upstream: "http://10.20.30.3:80/s/dowmWB66n57Lmxa/download?path=%2F&files=<FILE>&downloadStartSecret=p1cvpdcr1q8", host: "xxx", referrer: "https://xxx/s/dowmWB66n57Lmxa"
2025/01/14 22:27:25 [warn] 156#156: *786 an upstream response is buffered to a temporary file /var/tmp/bunkerweb/proxy_temp/0000000010 while reading upstream, client: xxx, server: xxx, request: "GET /s/dowmWB66n57Lmxa/download?path=%2F&files=<FILE>&downloadStartSecret=p1cvpdcr1q8 HTTP/2.0", upstream: "http://10.20.30.3:80/s/dowmWB66n57Lmxa/download?path=%2F&files=<FILE>&downloadStartSecret=p1cvpdcr1q8", host: "xxx", referrer: "https://xxx/s/dowmWB66n57Lmxa"
2025/01/14 22:26:45 [warn] 156#156: *769 an upstream response is buffered to a temporary file /var/tmp/bunkerweb/proxy_temp/0000000009 while reading upstream, client: xxx, server: xxx, request: "GET /apps/activity/js/Activity.chunk.mjs HTTP/2.0", upstream: "http://10.20.30.3:80/apps/activity/js/Activity.chunk.mjs", host: "xxx"
2025/01/14 22:26:44 [warn] 151#151: *855 an upstream response is buffered to a temporary file /var/tmp/bunkerweb/proxy_temp/0000000008 while reading upstream, client: xxx, server: xxx, request: "GET /apps/recommendations/js/recommendations-main.js?v=96ea537c-9 HTTP/2.0", upstream: "http://10.20.30.3:80/apps/recommendations/js/recommendations-main.js?v=96ea537c-9", host: "xxx", referrer: "https://xxx/apps/files/"
2025/01/14 22:26:44 [warn] 156#156: *786 an upstream response is buffered to a temporary file /var/tmp/bunkerweb/proxy_temp/0000000007 while reading upstream, client: xxx, server: xxx, request: "GET /apps/files_downloadlimit/js/index-CaJn5nuV.chunk.mjs HTTP/2.0", upstream: "http://10.20.30.3:80/apps/files_downloadlimit/js/index-CaJn5nuV.chunk.mjs", host: "xxx", referrer: "https://xxx/apps/files_downloadlimit/js/files_downloadlimit-main.mjs?v=96ea537c-9"
2025/01/14 22:26:44 [warn] 156#156: *786 an upstream response is buffered to a temporary file /var/tmp/bunkerweb/proxy_temp/0000000006 while reading upstream, client: xxx, server: xxx, request: "GET /apps/files_downloadlimit/js/_plugin-vue2_normalizer-DB3hhwPC.chunk.mjs HTTP/2.0", upstream: "http://10.20.30.3:80/apps/files_downloadlimit/js/_plugin-vue2_normalizer-DB3hhwPC.chunk.mjs", host: "xxx", referrer: "https://xxx/apps/files_downloadlimit/js/files_downloadlimit-main.mjs?v=96ea537c-9"
2025/01/14 22:24:05 [warn] 151#151: *189 an upstream response is buffered to a temporary file /var/tmp/bunkerweb/proxy_temp/0000000005 while reading upstream, client: xxx, server: xxx, request: "GET /apps/notifications/js/BrowserStorage-CGmIGy5r.chunk.mjs HTTP/2.0", upstream: "http://10.20.30.3:80/apps/notifications/js/BrowserStorage-CGmIGy5r.chunk.mjs", host: "xxx"
2025/01/14 22:24:05 [warn] 151#151: *189 an upstream response is buffered to a temporary file /var/tmp/bunkerweb/proxy_temp/0000000004 while reading upstream, client: xxx, server: xxx, request: "GET /apps/notifications/js/_plugin-vue2_normalizer-BU0IC95A.chunk.mjs HTTP/2.0", upstream: "http://10.20.30.3:80/apps/notifications/js/_plugin-vue2_normalizer-BU0IC95A.chunk.mjs", host: "xxx"
2025/01/14 22:24:05 [warn] 151#151: *189 an upstream response is buffered to a temporary file /var/tmp/bunkerweb/proxy_temp/0000000003 while reading upstream, client: xxx, server: xxx, request: "GET /apps/notifications/js/NotificationsApp-BMrpqXq-.chunk.mjs HTTP/2.0", upstream: "http://10.20.30.3:80/apps/notifications/js/NotificationsApp-BMrpqXq-.chunk.mjs", host: "xxx"
2025/01/14 22:24:05 [warn] 154#154: *249 an upstream response is buffered to a temporary file /var/tmp/bunkerweb/proxy_temp/0000000002 while reading upstream, client: xxx, server: xxx, request: "GET /apps/photos/js/photos-dashboard.js?v=96ea537c-9 HTTP/2.0", upstream: "http://10.20.30.3:80/apps/photos/js/photos-dashboard.js?v=96ea537c-9", host: "xxx", referrer: "https://xxx/apps/dashboard/"
2025/01/14 22:24:05 [warn] 154#154: *247 an upstream response is buffered to a temporary file /var/tmp/bunkerweb/proxy_temp/0000000001 while reading upstream, client: xxx, server: xxx, request: "GET /apps/recommendations/js/recommendations-dashboard.js?v=96ea537c-9 HTTP/2.0", upstream: "http://10.20.30.3:80/apps/recommendations/js/recommendations-dashboard.js?v=96ea537c-9", host: "xxx", referrer: "https://xxx/apps/dashboard/"

BunkerWeb version

1.5.12

What integration are you using?

Docker

Linux distribution (if applicable)

docker

Removed private data

• I have removed all private data from the configuration file and the logs

Code of Conduct

• I agree to follow this project's Code of Conduct

[Ghosty01]

used the original nextcloud image works (linuxserver doesnt)

[TheophileDiot]

Oh I see, happy to see that the issue was elsewhere and that it's now fixed for you ! 😄

[Ghosty01]

Okay, happens again :/

[Ghosty01]

on nextcloud contaier did fix it for me

• PHP_MEMORY_LIMIT=-1

[TheophileDiot]

Hi @Ghosty01,

Thanks for bringing this up. I don’t believe this issue is caused by BunkerWeb, as this feature has been thoroughly tested. The problem is more likely related to the Nextcloud configuration instead.

Here are a few suggestions you can try to resolve the issue:

1. Adjust the Nextcloud Upload Limits:
   • Check the config.php file in your Nextcloud directory and look for the upload_max_filesize and post_max_size parameters. These should be set to the desired size limit.
   Example:

'upload_max_filesize' => '10G',
'post_max_size' => '10G',

2. Verify PHP Configuration:
   Ensure that your PHP settings also allow the desired file size. Update the following values in your php.ini file:

upload_max_filesize = 10G  
post_max_size = 10G  
max_execution_time = 3600  
memory_limit = 512M  

3. Check BunkerWeb (Optional):
   While it’s unlikely that BunkerWeb is causing the issue, ensure that you have the right value for the MAX_CLIENT_SIZE setting (default : 10m).
4. Database Configuration:
   If you’re using Nextcloud’s chunked file upload system, ensure the database settings can handle large transactions. For example, increase the max_allowed_packet size in your MySQL or MariaDB configuration if necessary.
5. Test with Logs:
   Enable detailed logging in both Nextcloud and your server to identify where the limitation occurs. This can help pinpoint whether it’s a PHP, server, or application-level issue.

If you try these steps and the issue persists, feel free to share more details about your setup, and I’d be happy to assist further.