I posted a question yesterday, Output characters to Word document with different formatting for each character. When I tried to edit it I was told that Stack Overflow was in read-only mode. It is still saying that today.
There are two links at the top, one to the status page and one to recent meta posts on the topic. Neither of them says that there is any problem.
There have been multiple reports in the comments and on other meta sites that this problem keeps happening to various users ever since the initial report (and likely there have been more incidents that were not reported at all), hence the close reason that it "can no longer be reproduced" is invalid.
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6(I suspect your requests aren’t making it to Stack Overflow servers, and the issue is isolated to you - or possibly other people near you or routing the same way. You could be getting served a cached version of the page from your ISP or a CDN or...)user1502910– user150291005/15/2024 00:03:29Commented May 15, 2024 at 0:03
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5Try clearing cookies (and maybe other cached data) in your browser. Can you access it with a different browser? FWIW, I'm also in Sydney.PM 2Ring– PM 2Ring05/15/2024 02:27:13Commented May 15, 2024 at 2:27
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7This has happened to several people over the last few months (including me). I suspect it has something to do with Stack Exchange's Cloudflare settings. I'm curious about what triggers it. IIRC, it happened to me when I had a busy Physics.SE question page open in my phone browser overnight. But that could just be a coincidence.PM 2Ring– PM 2Ring05/15/2024 07:23:11Commented May 15, 2024 at 7:23
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3Been happening to me for about 12 hours on math.SE.com. BTW: are the links in the read-only banner to the SE.com status and SE.com meta or are they properly specialized to the stack where they appear? For me, instead of to a math.SE status and meta.math.SE, they're to the SE.com status and meta. Reported hereEric Towers– Eric Towers06/22/2024 15:06:29Commented Jun 22, 2024 at 15:06
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4Report of the same issue happening on RPG.Thomas Markov– Thomas Markov06/23/2024 08:22:04Commented Jun 23, 2024 at 8:22
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4Another report from Mathoverflow.Emil Jeřábek– Emil Jeřábek07/05/2024 08:54:25Commented Jul 5, 2024 at 8:54
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1And now it happened to myself; added to the linked meta.MO post.Emil Jeřábek– Emil Jeřábek07/25/2024 06:48:18Commented Jul 25, 2024 at 6:48
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1Another possible instance: meta.stackexchange.com/questions/401510/… , though this differs from all other reports here in that the issue fixed itself after several hours without the user having done anything.Emil Jeřábek– Emil Jeřábek07/25/2024 08:47:14Commented Jul 25, 2024 at 8:47
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2as of 15:01 25 July 24 Mozilla Firefox snap for Ubuntu 128.0.2 (64-bit) Ask Ubuntu in read only since early morning but photography okdmkonlinux– dmkonlinux07/25/2024 14:02:31Commented Jul 25, 2024 at 14:02
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5Looks like they have acknowledged (and fixed) the issue: stackstatus.net/incidents/f1490159-6b45-4b27-8a2b-cbcc1eaa05b1user1502910– user150291007/25/2024 17:47:21Commented Jul 25, 2024 at 17:47
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1The next report: meta.stackexchange.com/questions/401833/…Emil Jeřábek– Emil Jeřábek07/31/2024 11:54:16Commented Jul 31, 2024 at 11:54
5 Answers 5
In Firefox, what worked for me is clicking the "lock" icon on the left of the address bar, and pressing Clear cookies and site data
.
Clearing cache and cookies (Chrome) fixed it.
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I'm curious what would have happened if you had tried to access any URL on the network (other than that one question) that your browser hadn't cached...user1502910– user150291005/16/2024 22:27:40Commented May 16, 2024 at 22:27
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1@testing-ma-lady When it happened to me, all of my other sites on the network behaved normally, only Physics.SE was in read-only mode.PM 2Ring– PM 2Ring05/17/2024 06:09:52Commented May 17, 2024 at 6:09
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When it happened to me, clearing cookies and data initially had no effect; it only worked on the second try about a half day later.Emil Jeřábek– Emil Jeřábek07/25/2024 06:56:37Commented Jul 25, 2024 at 6:56
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Another weird thing is that the issue is somehow tied to the user account as it affected both devices I use to access the site at the same time, nevertheless I had to clear cookies on each device separately to fix it.Emil Jeřábek– Emil Jeřábek07/25/2024 11:47:37Commented Jul 25, 2024 at 11:47
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3Clearing my cache worked for me, but only briefly. I again have no access to MathOverflow. Clearing my cache a second time had no effect.JDH– JDH07/25/2024 14:35:18Commented Jul 25, 2024 at 14:35
For all you nerds who care, this seems to be caused by the __cflb
cookie specifically. Deleting that cookie got me out of read-only mode without signing me out.
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1Work like charm. Out of curiosity, How could you find this
__cflb
cookie affect it?zangw– zangw01/21/2025 02:40:28Commented Jan 21 at 2:40 -
4@zangw Deleting each cookie and reloading the page, one at a time. I’m sure there’s an intelligent way to do this, but there are also only like ten cookies, so whatever.Anerdw– Anerdw01/21/2025 03:55:11Commented Jan 21 at 3:55
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3As an additional context, looks like
__cflb
is for Cloudflare Load Balancer session affinity.Meta Andrew T.– Meta Andrew T.02/24/2025 05:20:17Commented Feb 24 at 5:20 -
1@MetaAndrewT. Nice find. Seems like a failover bug, probably. Also explains why some reported the bug fixing itself with time; the cookie apparently resets somewhere between a couple seconds and a day.Anerdw– Anerdw02/24/2025 05:47:12Commented Feb 24 at 5:47
FYI - I've added the status-review tag to the post. The team is aware and discovered what's causing this during last night's maintenance (see here and here). No estimated timeline, but it is on the team's radar for investigation into a fix for it.
In the meantime, as @pmolsen mentioned above, clearing cache and cookies is the current suggested workaround.
I have resolved this issue by changing some code on our side. The root of the issue has to do with us needing to set sticky sessions to reduce the number of open connections on our servers. I've worked around this requirement by making sessions refresh whenever the site is accessed in read only mode.