Merge pull request #1673 from eclipse-ditto/ditto-331

prepare Ditto 3.3.1 bugfix release

documentation/src/main/resources/_data/sidebars/ditto_sidebar.yml

@@ -23,6 +23,9 @@ entries:
       - title: Release Notes
         output: web
         folderitems:
+          - title: 3.3.1
+            url: /release_notes_331.html
+            output: web
           - title: 3.3.0
             url: /release_notes_330.html
             output: web

documentation/src/main/resources/pages/ditto/release_notes_331.md

@@ -0,0 +1,60 @@
+---
+title: Release notes 3.3.1
+tags: [release_notes]
+published: true
+keywords: release notes, announcements, changelog
+summary: "Version 3.3.1 of Eclipse Ditto, released on 29.06.2023"
+permalink: release_notes_331.html
+---
+
+This is a bugfix release, no new features since [3.3.0](release_notes_330.html) were added.
+
+## Changelog
+
+Compared to the latest release [3.3.0](release_notes_330.html), the following changes and bugfixes were added.
+
+### Changes
+
+None
+
+
+### Bugfixes
+
+This is a complete list of the
+[merged pull requests](https://github.com/eclipse-ditto/ditto/pulls?q=is%3Apr+milestone%3A3.3.1).
+
+#### [Fix blocking Akka dispatcher thread on WoT skeleton creation](https://github.com/eclipse-ditto/ditto/pull/1666)
+
+Ditto's [WoT integration](basic-wot-integration.html) did block the Akka dispatcher thread which could lead to deadlock 
+situations when e.g. creating new twins based on a WoT ThingModel.  
+
+This was solved and the complete WoT operations are now executed asynchronously.
+
+
+### Helm Chart
+
+The [Ditto Helm Chart](https://github.com/eclipse-ditto/ditto/tree/master/deployment/helm), which was enhanced and changed 
+a lot for version 3.3.0, contained some configuration bugs which are also addressed with this bugfix release.
+
+
+#### [Fix that nginx's worker_processes setting 'auto' causes problems with workers having many CPUs](https://github.com/eclipse-ditto/ditto/pull/1667)
+
+Configure the "dittoui"'s nginx to only use 1 worker process, as it only serves static content.  
+Add configuration option in the Helm chart `values.yaml` to configure the nginx's used worker_processes and default to 4
+
+#### [Fix wrong config path for pulling devops and status password from helm values](https://github.com/eclipse-ditto/ditto/pull/1671)
+
+The devopsPassword and statusPassword were read from `.Values.gateway.devopsPassword` and `.Values.gateway.statusPassword`.
+In the `values.yaml` these two values were however located at different configuration levels.
+
+As a result, the two passwords werew always regenerated and the passed passwords were not used.
+
+#### [Configure queryReadConcern: "local" for ditto things-search by default](https://github.com/eclipse-ditto/ditto/pull/1672)
+
+The `readConcern` was by default configured to `"linearizable"` which however fails in a "single instance" MongoDB setup.  
+Changed to be by default `queryReadConcern: "local"` with hint to configure otherwise for replicated MongoDB setups.
+
+#### [Support for ingress controller](https://github.com/eclipse-ditto/ditto/pull/1668)
+
+The Ditto Helm chart now supports to additionally deploy a (nginx-based) "Ingress controller", if configured.  
+By default, the deployment of the Ingress controller is however disabled.