Meteor-files: Image Uploads on GridFS spontaneously stopped working. WS connection drops.

[sabedinia]

Client disconnects occasionally after upload start. Meteor.status().connected === false.
For some reason uploads spontaneously work. Before we had no trouble uploading larger ones but now all of a sudden uploads would stall. The state will go from active ---> paused. Then when i try to call continue() is still hangs.

I'm wondering if anybody else is experiencing this?

1. using DDP to stream.
2. Here are the logs:

[FilesCollection.storagePath] Set to: assets/app/uploads/image
{"line":"80","file":"migrations_server.js","message":"Migrations: Not migrating, already at version 1.205","time":{"$date":1602458759904},"level":"info"}
[FilesCollection] [find({}, undefined)]
[FilesCollection] [find({}, undefined)]
[FilesCollection] [find({}, undefined)]
[FilesCollection] [File Start Method] IMG_3835.jpeg - nKNpxfLhvRJTmkMd2
[FilesCollection] [Upload] [DDP Start Method] Got #-1/2 chunks, dst: IMG_3835.jpeg
[FilesCollection] [Upload] [DDP] Got #2/2 chunks, dst: IMG_3835.jpeg
[FilesCollection] [find({}, undefined)]
[FilesCollection] [find({}, undefined)]
[FilesCollection] [find({}, undefined)]
[FilesCollection] [find({}, undefined)]
[FilesCollection] [find({}, undefined)]
[FilesCollection] [find({}, undefined)]
[FilesCollection] [find({}, undefined)]
[FilesCollection] [find({}, undefined)]
[FilesCollection] [find({}, undefined)]
[FilesCollection] [find({}, undefined)]
[FilesCollection] [find({}, undefined)]
[FilesCollection] [find({}, undefined)]
[FilesCollection] [find({}, undefined)]
[FilesCollection] [find({}, undefined)]
[FilesCollection] [find({}, undefined)]
[FilesCollection] [find({}, undefined)]
[FilesCollection] [find({}, undefined)]
[FilesCollection] [find({}, undefined)]
[FilesCollection] [find({}, undefined)]
[FilesCollection] [find({}, undefined)]
[FilesCollection] [find({}, undefined)]
[FilesCollection] [find({}, undefined)]
[FilesCollection] [find({}, undefined)]
[FilesCollection] [find({}, undefined)]
[FilesCollection] [find({}, undefined)]
[FilesCollection] [find({}, undefined)]
[FilesCollection] [find({}, undefined)]
[FilesCollection] [find({}, undefined)]
[FilesCollection] [find({}, undefined)]

639b66562672d9e23f26b253b859d4bb3261915ea.js?meteor_js_resource=true:325 [FilesCollection] [findOne({}, undefined)]
39b66562672d9e23f26b253b859d4bb3261915ea.js?meteor_js_resource=true:325 [FilesCollection] [insert()]
39b66562672d9e23f26b253b859d4bb3261915ea.js?meteor_js_resource=true:325 [FilesCollection] [FileUpload] [constructor]
39b66562672d9e23f26b253b859d4bb3261915ea.js?meteor_js_resource=true:325 [FilesCollection] [insert] using WebWorkers
39b66562672d9e23f26b253b859d4bb3261915ea.js?meteor_js_resource=true:325 [FilesCollection] [UploadInstance] [createStreams]
39b66562672d9e23f26b253b859d4bb3261915ea.js?meteor_js_resource=true:325 loadFile IMG_3835.jpeg: 95.85498046875 ms
39b66562672d9e23f26b253b859d4bb3261915ea.js?meteor_js_resource=true:325 [FilesCollection] [insert] [Tracker] [pause]
39b66562672d9e23f26b253b859d4bb3261915ea.js?meteor_js_resource=true:325

[dr-dimitru]

I recommend to switch to HTTP transport and reduce chunk size, in case if it's dynamic change it to constraint 8000, and go up to around 256000, you should find optimal value in between this range

[sabedinia]

@dr-dimitru thanks so much for responding. stayed up till 1am last night trying to debug this. The issue was related to the firewall.

In the future if anyone notices the web socket connection dropping after a minute or so on idle. Try restarting the firewall.
We were using pfSense.

[dr-dimitru]

Thank you for sharing insights into your solution. I'm glad you were able to fix it relatively quickly 😬

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