Cloud Storage suddenly providing a cached file despite "no-cache" metadata

[Massimo Di Cosimo]

Hi, I've been using the Storage service for years but starting from yesterday I'm having a problem.
I'm getting a cached version of the files even if I put the "no-cache" option in Cache-Control.
Was there any recent change that I should be aware of?

Thank you,
Max

[Kenworth (Google Cloud Platform)]

QQ: Can you please provide your complete headers? And how long do the files get cached?

[Massimo Di Cosimo]

Here are metadata:

Content-Type	application/octet-stream
Content-Encoding
Content-Disposition
Content-Language
Cache-Control	no-cache

I'm not sure about caching duration: at this moment I'm getting the file version of more than 10 hours ago, even if it was updated 13 times since then, the last a couple of hours ago.

If you want to give it a try, here is the public link:
https://storage.googleapis.com/mdc_bucket_1/TerremotiItalia/week99.txt

It's a text file and the first row should contain the following date/time (taken now from the Google Cloud Platform Browser)
2018    04    05    18:01:10

If I get it with browser the first row is
2018    04    05    09:53:48

Thank you,

Massimo Di Cosimo

On Thu, Apr 5, 2018 at 8:23 PM, 'Kenworth (Google Cloud Platform)' via Google App Engine <google-a...@googlegroups.com> wrote:

QQ: Can you please provide your complete headers? And how long do the files get cached?

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[Massimo Di Cosimo]

Small update.
At this moment, if I connect through the cellular network I get an old version of file, while if I connect through the wifi of my house (fixed connection) I get the latest file.
Thanks,
Massimo

[Kenworth (Google Cloud Platform)]

What happens if you try it with a cellular network in incognito/private mode?

[Massimo Di Cosimo]

At this moment I get the same old version (about 36 hours) from any path:

- PC connected through home fixed connection
- mobile phone through cellular netwok
- mobile phone through home fixed connection

On the mobile phone (Android) I tried with:
- Chrome
- Chrome in incognito
- phone standard browser

Please also note that since about 10 hours ago I changed the Cache-Control setting to "private" (following this article: https://cloud.google.com/storage/docs/gsutil/addlhelp/WorkingWithObjectMetadata)

Thank you,
Massimo

[Kenworth (Google Cloud Platform)]

Setting the Cache-Control header to 'private' should have prevented caching of the object. Since this is not the case, I highly encourage you to submit a defect report as described in this article so that proper attention and weight will be given to it. We monitor that issue tracker closely.

I look forward to this issue report.

[Snehal Shinde]

Did it solved the problem for you? As i am also facing the same issue from last week and its getting worse as different PC's for the same URL are behaving in a  different way. Three PC it will show three different version and one PC it will show the right version.

[Kenworth (Google Cloud Platform)]

Hi Snehal, setting the cache to 'private' or 'no-store' fixed the issue for some users. If this is not the case, please submit a defect report as mentioned previously so we can further investigate the issue. Thanks

[Massimo Di Cosimo]

Report submitted: Issue ID =  77842189 (https://issuetracker.google.com/77842189)
Thank you!

[Massimo Di Cosimo]

Dear Snehal,
it seems that "cache busting" is effective in those cases.
Massimo