How do I manually update the Log4j version? – meshIQ

This article provides instructions for manually upgrading the Log4j version for Solr and the platform.

Manually Upgrade Log4j JAR Files in Platform

To manually upgrade the Log4j JAR files from one version to another in platform, follow the instructions below.

Download the Log4j package containing jar files from the following link https://archive.apache.org/dist/logging/log4j/ and place it in $APIN_HOME=/opt/meshiq
Unzip the downloaded package using the following command
```
unzip apache-log4j-2.x.x-bin.zip
```
apache-log4j-2.x.x folder is obtained containing all the required jars that have to be replaced.
Go to $APIN_HOME/sbin and stop Web, CEP, and Domain services using the following command,
```
./stop.sh web 
./stop.sh cep
./stop.sh domain
```

Navigate to $APIN_HOME/platform/lib/ and replace the following JAR files,

$APIN_HOME/platform/lib/log4j-core-xxx.jar
$APIN_HOME/platform/lib/log4j-slf4j2-impl-xxx.jar
$APIN_HOME/platform/lib/log4j-api-xxx.jar

Also, the commons-text-xxx.jar should be replaced in the following location
```
$APIN_HOME/platform/lib/commons-text-xxx.jar
```
This jar file can be downloaded from the following link https://archive.apache.org/dist/commons/text/binaries/
Restart the Domain, CEP, and Web services in the $APIN_HOME/sbin using ./start.sh
```
./start.sh domain
./start.sh cep
./start.sh web 
```

Manually Upgrade Log4j JAR Files in Solr

To manually upgrade the Log4j JAR files from one version to another in Solr, follow the instructions below.

Download the Log4j package containing JAR files from the following link https://archive.apache.org/dist/logging/log4j/ and place it in $APIN_HOME
Unzip the downloaded package using the following command
```
unzip apache-log4j-2.x.x-bin.zip
```
The apache-log4j-2.x.x folder is obtained containing all the required jars that have to be replaced.
Go to $APIN_HOME/sbin and stop Web, CEP, Domain, and Solr services using the following command,
```
./stop.sh web 
./stop.sh cep
./stop.sh domain
./stop.sh solr
```

Navigate to $APIN_HOME/solr/solr-8.11.1/server/lib/ext and replace the following JAR files,

$APIN_HOME/solr/solr-8.11.1/server/lib/ext/log4j-core-xxx.jar
$APIN_HOME/solr/solr-8.11.1/server/lib/ext/log4j-web-xxx.jar
$APIN_HOME/solr/solr-8.11.1/server/lib/ext/log4j-slf4j-impl-xxx.jar
$APIN_HOME/solr/solr-8.11.1/server/lib/ext/log4j-layout-template-json-xxx.jar
$APIN_HOME/solr/solr-8.11.1/server/lib/ext/log4j-api-xxx.jar
$APIN_HOME/solr/solr-8.11.1/server/lib/ext/log4j-1.2-api-xxx.jar
$APIN_HOME/solr/solr-8.11.1/contrib/prometheus-exporter/lib/log4j-core-xxx.jar
$APIN_HOME/solr/solr-8.11.1/contrib/prometheus-exporter/lib/log4j-slf4j-xxx.jar
$APIN_HOME/solr/solr-8.11.1/contrib/prometheus-exporter/lib/log4j-api-xxx.jar

If updating 11.2 (deployment pack) and later versions only the following jars shall be replaced.

$APIN_HOME/solr/solr-8.11.1/server/lib/ext/log4j-core-xxx.jar
$APIN_HOME/solr/solr-8.11.1/server/lib/ext/log4j-web-xxx.jar
$APIN_HOME/solr/solr-8.11.1/server/lib/ext/log4j-slf4j-impl-xxx.jar
$APIN_HOME/solr/solr-8.11.1/server/lib/ext/log4j-layout-template-json-xxx.jar
$APIN_HOME/solr/solr-8.11.1/server/lib/ext/log4j-api-xxx.jar
$APIN_HOME/solr/solr-8.11.1/server/lib/ext/log4j-1.2-api-xxx.jar

Also, the commons-text-xxx.jar should be replaced in the following location
```
$APIN_HOME/solr/solr-8.11.1/server/solr-webapp/webapp/WEB-INF/lib/commons-text-xxx.jar
```
This jar file can be downloaded from the following link https://archive.apache.org/dist/commons/text/binaries/
Restart the Web, CEP, Domain, and Solr services in the $APIN_HOME/sbin using ./start.sh
```
./start.sh solr
./start.sh domain
./start.sh cep
./start.sh web 
```