tools/open_trace_in_ui script executon failed #2413
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I want to use the tools/open_trace_in_ui script to open a local trace.perfetto-trace file, but after the script executes, the browser displays a pop-up error: Could not load local trace TypeError: Failed to fetch. When checking through Google's developer tools, the error messages are as follows: What might be causing this issue, and are there any solutions? |
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Replies: 1 comment 7 replies
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Are you running on a remote machine e.g. via SSH? If so you would need to port forward port 9001 and also use the -n flag to prevent the browser window from trying to be opened on the remote machine. Alternatively if you are running on WSL or Windows, firewall or antivirus may be preventing access to 9001, you will need to allow us to access that port. |
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To clarify, I want to implement a feature that automatically opens the trace immediately after capture. I examined the record_android_trace script and found that its automatic trace-opening logic is identical to that in the open_trace_in_ui script. However, due to port access restrictions, the method used in these scripts cannot open the trace file directly in the browser. If there are no alternative ways to achieve this automatic opening feature, I’ll resort to manually clicking the "Open trace file" button in the UI instead. |
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Due to the way browsers work we cannot reach into the filesystem and fetch the trace, it has to be exposed to the browser via a local server. If that's not a suitable option, there's no other solution than opening the files manually. |
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Okay, thank you very much! By the way, if I want to customize the Perfetto UI interface myself (i.e., build the UI from source), which files would I need to modify to change the layout in the UI, primarily the left sidebar? |
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Sorry we do not have the bandwidth to guide people on making ad hoc customizations for the UI. The code is all there, you can read it yourself. The only suggestion would be to use the plugin API (https://perfetto.dev/docs/contributing/ui-plugins) to make your life easier for future merged as the UI moves very fast and you will find your life very difficult with trying to merge features in the future if you make ad hoc changes throughout the codebase :) |
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Okay, tks. |
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Are you running on a remote machine e.g. via SSH? If so you would need to port forward port 9001 and also use the -n flag to prevent the browser window from trying to be opened on the remote machine.
Alternatively if you are running on WSL or Windows, firewall or antivirus may be preventing access to 9001, you will need to allow us to access that port.