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When I am in the view of the invoice shown in the image and I click on download, the browser is continuously processing (the loading circle of the tab rotates) and after about 20-30 seconds the nginx error of the image is displayed.

I have checked the logs but no logs are being saved in the /var/log/odoo/odoo.log file

I tried installing wkhtmltopdf, but the problem persists. What else could I try?

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Author

Hi, I solved the problem.

The odoo.conf file had only 1 worker defined.
Print / download invoice requires 2 workers

Sound good.
If you want to user workers you need to configure it correctly:
number of workers = (CPU Core * 2) + 1
So if you have server with 4 CPU, 8 Thread:
(4 * 2) + 1 = 9 <- theoretical maximal number of worker

You can refer to Odoo deployment:
https://www.odoo.com/documentation/16.0/administration/install/deploy.html#id5

Best Answer

Do you use any other reverse proxy besides Nginx?

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Try running wkhtmltopdf manually from the command line to see if it works outside of Odoo.
This post was last modified: 10-04-2025, 05:48 am by https://spacewaves.io

Author Best Answer

Sorry

I just saw that I hadn't uploaded the images, and I can't do that because of karma. Proxy mode is set to true, I'm checking console. When I press download i get a 504 Gateway Time-out from nginx

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What are you getting in the console?
You need to check the nginx error log as well.

Author

I'm getting this in the console

warning: Some modules could not be started
boot.js:327 Missing dependencies: Array(19)0: "@web/core/assets"1: "@web/core/browser/feature_detection"2: "@web/core/ui/ui_service"3: "@web/core/l10n/translation"4: "@web/core/utils/render"5: "@web/core/browser/browser"6: "@web/core/registry"7: "@web/core/utils/concurrency"8: "@web/core/utils/ui"9: "@web/core/transition"10: "@web/core/l10n/localization"11: "@web/core/utils/strings"12: "web.public_env"13: "web.public.lazyloader"14: "@web/legacy/utils"15: "web.OwlCompatibility"16: "@web/env"17: "@web/core/main_components_container"18: "@web/core/network/rpc_service"length: 19[[Prototype]]: Array(0)
boot.js:348 Non loaded modules: Array(61)0: "web.assets.qweb"1: "@web/legacy/js/libs/pdfjs"2: "web.AbstractService"3: "web.AbstractStorageService"4: "web.ajax"5: "web.BrowserDetection"6: "web.Bus"7: "web.Dialog"8: "web.OwlDialog"9: "web.dom"10: "web.local_storage"11: "web.mixins"12: "web.QWeb"13: "web.RamStorage"14: "web.Registry"15: "web.rpc"16: "web.ServiceProviderMixin"17: "web.ServicesMixin"18: "web.Session"19: "web.sessionStorage"20: "web.time"21: "web.translation"22: "web.utils"23: "web.Widget"24: "web.AjaxService"25: "web.config"26: "web.core"27: "web.LocalStorageService"28: "web.SessionStorageService"29: "web.commonEnv"30: "web.name_and_signature"31: "web/static/src/js/core/smooth_scroll_on_drag.js"32: "web.Colorpicker"33: "web.TranslationDialog"34: "@bus/im_status_service"35: "@bus/multi_tab_service"36: "@bus/services/assets_watchdog_service"37: "@bus/services/bus_service"38: "@bus/services/legacy/make_bus_service_to_legacy_env"39: "@bus/services/legacy/make_multi_tab_to_legacy_env"40: "@bus/services/presence_service"41: "web_tour.RunningTourActionHelper"42: "web_tour.Tip"43: "web_tour.TourManager"44: "web_tour.tour"45: "web_tour.TourStepUtils"46: "web_tour.utils"47: "web_editor.ace"48: "@web_editor/js/common/grid_layout_utils"49: "web_editor.utils"50: "@sign/js/common/PDFIframe"51: "@sign/js/common/document"52: "@sign/js/common/document_signable"53: "web.assets_common.bundle.xml"54: "web.session"55: "@web/legacy/js/public/public_root"56: "web.public.root"57: "@web/legacy/js/public/public_root_instance"58: "root.widget"59: "@web/legacy/js/public/public_widget"60: "web.public.widget"length: 61[[Prototype]]: Array(0)
owl.js:5605 Owl is running in 'dev' mode.

This is not suitable for production use.
See https://github.com/odoo/owl/blob/ba20267/doc/reference/app.md#configuration for more information.
tour_manager.js:53 Tour Manager is ready. running_tour=null

Best Answer

Hi,

You are using nginx so Make sure that the proxy_mode = True in your Odoo config file. 

If you opened the inspect in your browser and check console, you will find more details about the error.

Thanks

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