title: log4j upgrade in elasticsearch
body: <p>Hello all I want to upgrade log4j in Elasticsearch the current version is shown below using the locate command , so which files I have to replace , also do I have to perform certain action after replacing the files</p>
  <p>root@la-prod7-client1:/# locate log4j</p>
  <p>/etc/elasticsearch/log4j2.properties</p>
  <p>/usr/share/elasticsearch/lib/log4j-api-2.11.1.jar</p>
  <p>/usr/share/elasticsearch/lib/log4j-core-2.11.1.jar</p>
  <p>/usr/share/elasticsearch/modules/x-pack-core/log4j-1.2-api-2.11.1.jar</p>
  <p>/usr/share/elasticsearch/modules/x-pack-identity-provider/log4j-slf4j-impl-2.11.1.jar</p>
  <p>/usr/share/elasticsearch/modules/x-pack-security/log4j-slf4j-impl-2.11.1.jar</p>
  <p>elastic version is 7.10.2
  JVM 15.0.1</p>
  <p>I need to know the steps i have to follow in order to upgrade log4j from 2.11.1 to 2.16.0</p>