High cpu usage after ES update to 7.17.7

Elasticsearch version: 7.17.7

Server OS version: SUSE Linux Enterprise Server 15 SP3

Kibana version (if relevant): 7.17.7

Describe the issue:


after an update from 7.16.2 to 7.17.7, we’re experiencing about double the CPU usage without changing anything else. This happens during all time and the usage basically never dropped below the new baseline. When looking into the hot_threads on a node, I receive the following:


Can someone please tell me what the transport_worker does and how I may be able to fix this?

Thanks in advance

What version of Search Guard are you using?

Sorry, my bad. We’re using search-guard-suite-plugin-7.17.7-53.5.0.

This should be fixed by Search Guard FLX:

Would it be possible for you to update to FLX?

Well, we bought 2 licenses, but I’m not sure if that would include FLX.
Also, we don’t have any experience with it, yet, so it would take some time to actually update to FLX.
Is there any chance of a quick fix?

Search Guard FLX does not require any new licenses.

For a quick fix, we need to check a couple of things - so it would be only medium quick. But we will try to come back to you ASAP.

Just a quick checkup: Are you having any index privileges set for aliases? (if you have an alias A for indices I1, I2, I3, do you define the privileges for A or for I*?)

No, we don’t have any index privileges set for aliases.

We have released a new Search Guard version for 7.17.7 and 7.17.8 which should fix your issue by making it possible to turn off index alias resolution: Search Guard 53.6 for Elasticsearch 7.17.8 released


thanks for the help. The follow site refers to the Kibana Plugin Version 53.0.0: Latest Releases | Security for Elasticsearch | Search Guard
On the other hand, here it says 53.5.0: Latest Releases | Security for Elasticsearch | Search Guard

Which Kibana Plugin Version should be used with the latest release for Elasticsearch 7.17.7?

The Kibana plugin was not updated, so just use 53.0.0.

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