CHANGES.md

Changes by Version
==================
Release Notes.

9.0.0
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#### Project

* Upgrade log4j2 to 2.16.0 for CVE-2021-44228 and CVE-2021-45046. This CVE only effects on JDK if JDNI is opened in
  default. Notice, using JVM option `-Dlog4j2.formatMsgNoLookups=true` or setting
  the `LOG4J_FORMAT_MSG_NO_LOOKUPS=”true”` environment variable also avoids CVEs.

#### OAP Server

* Fix potential NPE in OAL string match and a bug when right-hand-side variable includes double quotes.
* Bump up Armeria version to fix CVE.
* Polish ETCD cluster config environment variables.

#### UI

#### Documentation

All issues and pull requests are [here](https://github.com/apache/skywalking/milestone/112?closed=1)

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Find change logs of all versions [here](changes).