Difficulties / Bugs with Canvas

Good morning,

I'm currently experiencing 2 issues with my 7.6.0 ECE install but my issues are specific to Kibana.

  1. When I try and print a workpad to pdf. Only a single page is printed to pdf.
    You can repo this by simply opening a new template and trying to print to pdf. Expected result is for all pages to be included but I only get a single page. If i add the post url to a watcher i'll get what seems like a random single page being outputted.

  2. I try and upload an image to my assets and even though only 3% of space is being used i get an error.
    The server gave a response that the workpad data was too large. This usually means uploaded image assets that are too large for Kibana or a proxy.
    This file is 535kb and i've been able to successfully add it to another workpad.

** Seems the limitation is 500kb but i do not know where to alter that limitation. **

Overall Canvas seems kind of flaky I get different results when trying to do the same thing with different workpads.

Thanks

Hi, this is a known issue and it will be fixed in 7.6.1: https://github.com/elastic/kibana/pull/56928 (It was totally my fault too - sorry about that!)

Whenever you make any changes to the workpad, the entire workpad gets re-uploaded to Elasticsearch for auto-saving. Canvas maintains the workpad as a single string of JSON, with the images converted to base64 format.

It sounds like the overall size of the workpad is pretty high for Elasticsearch, or a proxy server in front of Elasticsearch. Elasticsearch has a setting to limit the size of HTTP payloads at http.max_content_length: https://www.elastic.co/guide/en/elasticsearch/reference/current/modules-http.html

If the size of the workpad isn't hitting the ES size limit, it could be hitting a limit of a 3rd party proxy server in front of Elasticsearch.

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Any idea on when 7.6.1 will get released? I will review my reverse proxy configuration but I'm only using 4% of the allocated space for a canvas project.

Thanks for your honesty

Hi, Kibana 7.6.1 was just released yesterday

Can confirm the PDF generation issue is resolved in 7.6.1

Thanks for following up on this thread.

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