Ok guys we fixed it, the issue was an unavailable files_server. After I've changed iptables rules everything works fine

You can Pm it to me if you'd like (after redacting sensitive info)

I think you should first start with the simple Trains example for reporting images, and get it to work

I'll remove sensitive info and send it here

What are the relevant parts?

That's what I'm thinking, but I'm not sure what could be wrong

Perhaps your traind.conf is not configured correctly for the file server?

Yes, looks like it

So there were no debug images reported as far as the server is concerned...

Here're the events.scalar_metrics payload:

{"meta":{"id":"08de8b5099dd4484a0aad19af2a140c2","trx":"08de8b5099dd4484a0aad19af2a140c2","endpoint":{"name":"events.scalar_metrics_iter_histogram","requested_version":"2.9","actual_version":"1.0"},"result_code":200,"result_subcode":0,"result_msg":"OK","error_stack":""},"data":{}}

Another thing by the way: seems like when I try to upload images scalars cease to update too

Here's the payload:

{"meta":{"id":"0fbbcd4fd5cf4b40a47997396521bae6","trx":"0fbbcd4fd5cf4b40a47997396521bae6","endpoint":{"name":"events.get_task_metrics","requested_version":"2.9","actual_version":"1.0"},"result_code":200,"result_subcode":0,"result_msg":"OK","error_stack":""},"data":{"metrics":[{"task":"9757604caf0342b6907d5eb672fe53cd","metrics":[]}]}}

events.get_task_metrics is the relevant call

Also event.get_all_ex

And events.get_task_plots

I see events.get_task_metrics call

What does it look like?

You should see a call sent to the server to get the debug images when you switch to the debug images tab - can you see if it returns anything?

They are uploaded to the Trains File Server component

Where does debug samples being stored? Maybe I can validate if they were uploaded to the server, I have an access to it

Also projects.get_all_ex method seems to be blocked

Yes, there's a lot of DataCloneError:
DataCloneError: The object could not be cloned. ExtensionChild.jsm:813 sendRemoveListener on closed conduit simple-translate@sienori.2199023255865 ConduitsChild.jsm:108 InvalidStateError: An attempt was made to use an object that is not, or is no longer, usable PictureInPictureChild.jsm:143 sendRemoveListener on closed conduit simple-translate@sienori.2199023255875 ConduitsChild.jsm:108 DataCloneError: The object could not be cloned. ExtensionChild.jsm:813 sendRemoveListener on closed conduit simple-translate@sienori.2199023255888 ConduitsChild.jsm:108 sendRemoveListener on closed conduit simple-translate@sienori.2199023255905 ConduitsChild.jsm:108 DataCloneError: The object could not be cloned. 3 ExtensionChild.jsm:813 DataCloneError: The object could not be cloned. ExtensionChild.jsm:813 DataCloneError: The object could not be cloned. 6 ExtensionChild.jsm:813 DataCloneError: The object could not be cloned. 6 ExtensionChild.jsm:813 DataCloneError: The object could not be cloned. 6 ExtensionChild.jsm:813 DataCloneError: The object could not be cloned. 5 ExtensionChild.jsm:813 DataCloneError: The object could not be cloned. ExtensionChild.jsm:813 DataCloneError: The object could not be cloned. 2 ExtensionChild.jsm:813 DataCloneError: The object could not be cloned. ExtensionChild.jsm:813 DataCloneError: The object could not be cloned. 3 ExtensionChild.jsm:813 DataCloneError: The object could not be cloned. 6 ExtensionChild.jsm:813 DataCloneError: The object could not be cloned. 6 ExtensionChild.jsm:813 DataCloneError: The object could not be cloned. 5 ExtensionChild.jsm:813 DataCloneError: The object could not be cloned. 3 ExtensionChild.jsm:813 DataCloneError: The object could not be cloned. 4 ExtensionChild.jsm:813 DataCloneError: The object could not be cloned. 4 ExtensionChild.jsm:813 DataCloneError: The object could not be cloned. ExtensionChild.jsm:813 DataCloneError: The object could not be cloned. 2 ExtensionChild.jsm:813 DataCloneError: The object could not be cloned. 15 ExtensionChild.jsm:813 DataCloneError: The object could not be cloned. 3 ExtensionChild.jsm:813 Use of nsIFile in content process is deprecated. 13 NetUtil.jsm:253:8 DataCloneError: The object could not be cloned. ExtensionChild.jsm:813 Relative positioning of table rows and row groups is now supported. This site may need to be updated because it may depend on this feature having no effect. RequestListHeader.js:545:20 sendRemoveListener on closed conduit simple-translate@sienori.4123168604366 ConduitsChild.jsm:108 DataCloneError: The object could not be cloned. ExtensionChild.jsm:813 DataCloneError: The object could not be cloned. ExtensionChild.jsm:813 DataCloneError: The object could not be cloned. ExtensionChild.jsm:813 sendRemoveListener on closed conduit simple-translate@sienori.4123168604447 ConduitsChild.jsm:108 DataCloneError: The object could not be cloned. ExtensionChild.jsm:813 DataCloneError: The object could not be cloned. ExtensionChild.jsm:813 DataCloneError: The object could not be cloned. ExtensionChild.jsm:813 DataCloneError: The object could not be cloned. ExtensionChild.jsm:813 DataCloneError: The object could not be cloned. ExtensionChild.jsm:813 DataCloneError: The object could not be cloned. ExtensionChild.jsm:813 DataCloneError: The object could not be cloned. ExtensionChild.jsm:813

Do you see any error in the browser's developer's console? In the console log, on in REST calls in the Network tab?

No, nothing

Do you see any errors in the experiment log?

No error, no warnings, images just don't show up

No, it's like nothing happens at all

Hi ProudMosquito87 , when you say you can't get Trains to log images, what exactly do you see? Do you get an error?