Server Error Reports

[amyk]

I just experienced this image bug with two posts here:
https://www.eevblog.com/forum/repair/old-cnc-machine-memory-board/

The image URLs are:
https://www.eevblog.com/forum/repair/old-cnc-machine-memory-board/?action=dlattach;attach=1021664;image

https://www.eevblog.com/forum/repair/old-cnc-machine-memory-board/?action=dlattach;attach=1021660;image

Note that they are different, but the contents are exactly the same.

HTTP headers of the two for comparison:

Code: [Select]

HTTP/1.1 200 OK
Server: nginx
Date: Sun, 12 Jul 2020 03:18:39 GMT
Content-Type: image/jpeg
Transfer-Encoding: chunked
Connection: keep-alive
X-Frame-Options: SAMEORIGIN
X-XSS-Protection: 1
X-Content-Type-Options: nosniff
Content-Encoding: none
Pragma:
Content-Transfer-Encoding: binary
Expires: Mon, 12 Jul 2021 03:18:39 GMT
Last-Modified: Sun, 12 Jul 2020 01:40:14 GMT
Accept-Ranges: bytes
ETag: "10216643-711-2615G.jpg1594518014"
Content-Disposition: inline; filename="3-711-2615G.jpg"
Cache-Control: max-age=31536000, private
X-Backend: web1.eevblog.com


Code: [Select]

HTTP/1.1 200 OK
Server: nginx
Date: Sun, 12 Jul 2020 03:18:53 GMT
Content-Type: image/jpeg
Transfer-Encoding: chunked
Connection: keep-alive
X-Frame-Options: SAMEORIGIN
X-XSS-Protection: 1
X-Content-Type-Options: nosniff
Content-Encoding: none
Pragma:
Content-Transfer-Encoding: binary
Expires: Mon, 12 Jul 2021 03:18:53 GMT
Last-Modified: Sun, 12 Jul 2020 01:40:14 GMT
Accept-Ranges: bytes
ETag: "10216603 542 1174A.JPG1594518014"
Content-Disposition: inline; filename="3 542 1174A.JPG"
Cache-Control: max-age=31536000, private
X-Backend: web2.eevblog.com

It claims the filenames are different but the last-modified for the two are the same, as-is the timestamp-ish part of the ETag (which translates precisely to the last-modified.)

[PushUp]

Thread-Problems with uploaded attachements!


As mentioned by TV84, this might be a big problem:
https://www.eevblog.com/forum/testgear/new-rigol-16-bit-function-generators-dg800900-series/msg3122658/#msg3122658

As long as only pictrures are concerned, it is simply annoying, compared to the effort you had with making, downsizing (to meet the max. 5MB limit) and last but not least uploading the images to your post.

The problem:
The Thumbnail-Picture is still fine, but the link to it is wrong and leads to a completely false picture. It is somehow messed up with any (!!!) further reply you make in the forum, I guess?!

Here is an example:
https://www.eevblog.com/forum/testgear/uni-t-ut181a-triplett-9065-trend-viewer-question/msg3132148/#msg3132148

The thumbnail of the first pic is correct, but it leads to the picture from my next reply, therefore it was somehow replaced by it, which leads to a mess, as described pictures are gone and the message gets useless...

Probably, it is better to use external image/file hoster, till the problem is solved to avoid a total mess?!


Cheers!

[SilverSolder]

I wonder why some people get less problems...

One thing that might vary from user to user, is how the files are named.   Do you always give the image a unique name in every post (including, being unique across all posts)?

[dcac]

When I post multiple pics they are usually from the same folder and therefor also has a unique name.

I wonder if the problem is more related to the amount of server traffic when you post the pictures/attachments.

[dcac]

This is the 'element code' of my two mentioned posts/pics from a PC that opens same image from both - or shows the error.

When I get access to the PC I made those post from I do the same thing to see if any difference appear.

Code: [Select]

<a href="https://www.eevblog.com/forum/projects/show-us-your-mains-waveform!/?action=dlattach;attach=1021018;image" id="link_1021018-0" onclick="return ILAexpandThumb(1021018-0);"><img src="https://www.eevblog.com/forum/index.php?action=dlattach;topic=240210.0;attach=1021020;image" alt="1021018-0" title="Show us your mains waveform!" id="thumb_1021018-0" style="width:100px;border:0;" data-pagespeed-url-hash="2538578502" onload="pagespeed.CriticalImages.checkImageForCriticality(this);"></a>


Code: [Select]

<a href="https://www.eevblog.com/forum/projects/show-us-your-mains-waveform!/?action=dlattach;attach=1021014;image" id="link_1021014-0" onclick="return ILAexpandThumb(1021014-0);"><img src="https://www.eevblog.com/forum/index.php?action=dlattach;topic=240210.0;attach=1021016;image" alt="1021014-0" title="Show us your mains waveform!" id="thumb_1021014-0" style="width:100px;border:0;" data-pagespeed-url-hash="1545177425" onload="pagespeed.CriticalImages.checkImageForCriticality(this);"></a>

EDIT: well the code is exactly the same from the PC that can open correct image - no big surprise there but I'm still puzzled how it manage to fetch the correct image it does not seem to get it from Firefox cache.

EDIT2: so what I am essentially observing is this link:

https://www.eevblog.com/forum/projects/show-us-your-mains-waveform!/?action=dlattach;attach=1021014;image

will open correct image from the PC I posted/uploaded it from and show a sine wave in blue. But if I open it from any other PC it opens the image from my previous post and show a sine wave in red.

All thumbnails are shown correctly from all PC I've tested.
 

[SilverSolder]

This is the 'element code' of my two mentioned posts/pics from a PC that opens same image from both - or shows the error.

When I get access to the PC I made those post from I do the same thing to see if any difference appear.

Code: [Select]

<img src="https://www.eevblog.com/forum/index.php?action=dlattach;topic=240210.0;attach=1021020;image" alt="1021018-0" title="Show us your mains waveform!" id="thumb_1021018-0" style="width:100px;border:0;" data-pagespeed-url-hash="2538578502" onload="pagespeed.CriticalImages.checkImageForCriticality(this);">

Code: [Select]

<img src="https://www.eevblog.com/forum/index.php?action=dlattach;topic=240210.0;attach=1021016;image" alt="1021014-0" title="Show us your mains waveform!" id="thumb_1021014-0" style="width:100px;border:0;" data-pagespeed-url-hash="1545177425" onload="pagespeed.CriticalImages.checkImageForCriticality(this);">

When I hit those two links (the img src links) from here, they are definitely different thumbnails.

[rhb]

I think it affects all attachments.  IIRC I had an Octave script that got posted as a jpg which I deleted when I couldn't open the image.

Reg

[amyk]

EDIT2: so what I am essentially observing is this link:

https://www.eevblog.com/forum/projects/show-us-your-mains-waveform!/?action=dlattach;attach=1021014;image

will open correct image from the PC I posted/uploaded it from and show a sine wave in blue. But if I open it from any other PC it opens the image from my previous post and show a sine wave in red.

All thumbnails are shown correctly from all PC I've tested.

From that link I am seeing a red sine wave.

Note: you should be able to do ctrl+F5 to force a reload from network and not cache, in most browsers. You can also directly access the network, with guarantee of no caching, by using utility like wget or curl.

[dcac]

EDIT2: so what I am essentially observing is this link:

https://www.eevblog.com/forum/projects/show-us-your-mains-waveform!/?action=dlattach;attach=1021014;image

will open correct image from the PC I posted/uploaded it from and show a sine wave in blue. But if I open it from any other PC it opens the image from my previous post and show a sine wave in red.

All thumbnails are shown correctly from all PC I've tested.

From that link I am seeing a red sine wave.

Note: you should be able to do ctrl+F5 to force a reload from network and not cache, in most browsers. You can also directly access the network, with guarantee of no caching, by using utility like wget or curl.

Yeah I finally manage to clear the Firefox cache - though I had to clear it restart FF and then clear it again. Now the posting PC also fetches the wrong image which is the red sine wave. I didn't clear any cookies so these probably had no effect on this problem.

[T3sl4co1l]

Also, can we have some way to disable Imgur embeds?

Say I post a link, a raw URL, not an img embed, and that's literally all I want.

There exists no combination of Imgur URL (gallery or direct link) that won't auto embed.  It's way too greedy.

Often I want to refer to links inline with text and this BIG MOTHERFUCKING EMBED interrupts my text, it's ridiculous.

YouTube embeds do the same thing, but there at least you can use a shortened link to evade it (IIRC?).

Tim

[BrianHG]

Image files and attached files corruptions going MAD.....

Example, 3 corrupt images on this thread page:
https://www.eevblog.com/forum/fpga/fpga-vga-controller-for-8-bit-computer/msg3135492/#msg3135492
Scroll down, the errors are over a few posts...

Try expanding the timing diagram in this post:
https://www.eevblog.com/forum/fpga/fpga-vga-controller-for-8-bit-computer/msg3121924/#msg3121924

try expanding the second image in this post:
https://www.eevblog.com/forum/fpga/fpga-vga-controller-for-8-bit-computer/msg3111866/#msg3111866

Or this one:
https://www.eevblog.com/forum/fpga/fpga-vga-controller-for-8-bit-computer/msg3111884/#msg3111884

This one has the wrong image:
https://www.eevblog.com/forum/fpga/fpga-vga-controller-for-8-bit-computer/1075/

This one is also corrupt:
https://www.eevblog.com/forum/fpga/fpga-vga-controller-for-8-bit-computer/msg3107130/#msg3107130

The top example now has 4 corrupt images.  Yes, 1 new one in the time I've been writing this message if you go to the first link and scroll up instead of down.  Those images were there fine yesterday.

Here is another one:
https://www.eevblog.com/forum/fpga/home-made-systemverilog-3-word-zero-latency-fifo-documented-for-beginners/msg3123336/#msg3123336

In fact, over the last week, I've editing my posts, deleting & re-uploading images again & again.
Does anyone know what's been going on?

[amyk]

Also, can we have some way to disable Imgur embeds?

Say I post a link, a raw URL, not an img embed, and that's literally all I want.

There exists no combination of Imgur URL (gallery or direct link) that won't auto embed.  It's way too greedy.

Often I want to refer to links inline with text and this BIG MOTHERFUCKING EMBED interrupts my text, it's ridiculous.

YouTube embeds do the same thing, but there at least you can use a shortened link to evade it (IIRC?).

Tim

Quote my post or click this link to find out how to get around that.

[tooki]

People! It’s a known issue, and it’s got nothing to do with your browser cache or anything, as it’s purely a server database problem. It seems to be triggered by interrupted posting.

In fact, over the last week, I've editing my posts, deleting & re-uploading images again & again.
Does anyone know what's been going on?

Yes.

See what the server admin has said, starting here: https://www.eevblog.com/forum/chat/website-error-reports/msg3107598/#msg3107598

[mnementh]

A fellow eevBlog member has suggested a possible workaround:

I think there's a problem only with the first attachment slot. If you skip the first one and use the other one it appear to be working fine.

I'm going to try this for a few days and see if it makes any difference.

Cheers,

mnem

[mnementh]

Update: So far, this method seems to be working. Even survives being interrupted by "There has been a new post" warning and a 4.1MB .pdf.

Will followup again in a day or three.

mnem
 

[dcac]

I'm getting 404 error trying to access this thread:

https://www.eevblog.com/forum/testgear/eevblog-121gw-multimeter-issues

[StillTrying]

I post nothing compared to others but still see the errors.
Post 2 of everything then a few hours later delete the spare or faulty versions.  

[mnementh]

I think there's a problem only with the first attachment slot. If you skip the first one and use the other one it appear to be working fine.

FWIW: This workaround is still working for me.

mnem
*knocks on wood*

[Monkeh]

I was thinking that it's overall just too much data for the software to handle.    Looking at my attachments, there's 121 pages of 25 images/page or over 3000 images spanning 5 years.   That's a lot of images.   

That's a really, really small number of files.

It seems more like a database replication issue.

[mnementh]

I was thinking that it's overall just too much data for the software to handle.    Looking at my attachments, there's 121 pages of 25 images/page or over 3000 images spanning 5 years.   That's a lot of images.   

That's a really, really small number of files.

It seems more like a database replication issue.

This is the latest I know of from gnif when he was available to work on the problem:

...I usually use Firefox on my PCs; I brought up the thread on my iPad/Firefox and still FUBAR the same way, so not a local cache issue. Same behavior in Edge.
 
This may be related to another bug that has been happening for months; when posting multiple images, IF the posting process is interrupted for a new post warning, the damned thing just forgets the first pic. It attaches the rest of the pics normally, but that first one you ALWAYS have to go back and attach again...  [edited for brevity]

mnem
Déjà vu: Best enjoyed as a garnish with wine, cheese and baguettes.

SMF doesn't care about the filename, it stores all attachments as a hash of the file contents and references them via a table. There are two possible reasons why this happened:

1) The bug you mentioned
2) The maintenance last night was intended to correct some sync issues between the web servers as the database cluster had lost sync. Normally this would be fine, but there were other factors at play at the same time that prevented them from determining who was the "latest" and both were accepting update/insert queries at the same time (split-brain).

I should have been clearer I am sorry, if this is seen on new posts as of today, please let me know. Feel free to fix any that are messed up from prior.

Since then it has been off & on, though server loading does affect it. It def happens a lot more often on weekends.

mnem
 

[mnementh]

I think there's a problem only with the first attachment slot. If you skip the first one and use the other one it appear to be working fine.

This workaround is still working for me. Last night I posted a mini how-to with 10 pics; deliberately did not wait for all the pics and just hit [POST]. eevBlog gagged on it for a few seconds, then popped up a THERE HAS BEEN A NEW POST warning. But after I clicked [POST] again, all the pics came up without issue; they were even in the right order for a change.

mnem
 

[tooki]

OK, so here's another data point for you, Gnif!

I just posted a thread reply with an inline image attachment. I didn't pay attention to whether the attachment icon showed up on the post before going in to modify the post. After saving the modified post, I noticed that while the inline image still appears properly, it shows no attachment icon, and clicking on Modify again also shows no attachment to remove!! (I've verified that in another pre-bug post with inline attachments, they still show up as attachments in the Modify screen.)

[tautech]

I think there's a problem only with the first attachment slot. If you skip the first one and use the other one it appear to be working fine.

This workaround is still working for me. Last night I posted a mini how-to with 10 pics; deliberately did not wait for all the pics and just hit [POST]. eevBlog gagged on it for a few seconds, then popped up a THERE HAS BEEN A NEW POST warning. But after I clicked [POST] again, all the pics came up without issue; they were even in the right order for a change.

mnem
 

This has been working perfect for me too. 

Pauses between Post and the forum showing the post are due to the time it takes for attachments to load whereas when you place an attachment in the first box it gets loaded onto the database before posting.

Like others I now just skip the first Attachment box and sidestep all the grief of needing to fix busted image links later. 

[SilverSolder]

I haven't had an issue posting single images, only counts >1 seem to be an issue.  Is that true for you as well?

[tautech]

I haven't had an issue posting single images, only counts >1 seem to be an issue.  Is that true for you as well?

I believe so......not 100% sure.
Never had issues until a few days ago when other images/attachments I'd posted got linked into the wrong posts. 
Had to delete the attachments and re-upload them then re-link them to where they needed to be.
Annoying but fixable. 

Rarely use the direct embed image thing or the drag and drop instead sticking to the old method we've had for years until recently when it corrupts links from thumbnails to between [i m g] link [/ i m g] flags whereas from the 2nd attachment box seems to work fine....for now.