Synchrony ignores synchrony-args.properties copy in local Confluence home in cluster setup

Problem

When Confluence is installed in DC mode, user should be able to set Synchrony node specific options by adding these in synchrony-args.properties located in Confluence home.

Environment

Confluence DC v8.1.1 running in Docker

Steps to Reproduce

1. Create synchrony-args.properties under Confluence home
2. Add the following option to synchrony-args.properties

   synchrony.jvm.arg.hznode=-Dhazelcast.local.publicAddress=192.168.1.100
   

3. Start Confluence with the following Docker run command:

   docker run -v /var/atlassian/application-data/confluence:/var/atlassian/application-data/confluence --name="confluence" -v /mnt/shared:/var/atlassian/application-data/confluence/shared-home -d -p 8090:8090 -p 8091:8091 -p 5801:5801 -e JVM_SUPPORT_RECOMMENDED_ARGS='-Dconfluence.cluster.node.name="ConnieNode2" -Dhazelcast.local.publicAddress=10.108.15.252' -p 25500:25500 -p 5701:5701 -p 54327:54327 atlassian/confluence:8.1.1
   

4. Exec in the docker container and check the Java options for synchrony

   docker exec -it confluence ps -efwww |grep synchrony.core
   

Expected Results

Synchrony process is running with hazelcast.local.publicAddress set.

conflue+   296     7  0 Apr14 ?        00:18:53 /opt/java/openjdk/bin/java -classpath /opt/atlassian/confluence/temp/5.0.5.jar:/opt/atlassian/confluence/confluence/WEB-INF/lib/org.postgresql_postgresql-42.5.0.jar -Xss2048k -Xmx2g -Dhazelcast.local.publicAddress=192.168.1.1 synchrony.core sql

Actual Results

Synchrony process is not running with hazelcast.local.publicAddress set.

conflue+   296     7  0 Apr14 ?        00:18:53 /opt/java/openjdk/bin/java -classpath /opt/atlassian/confluence/temp/5.0.5.jar:/opt/atlassian/confluence/confluence/WEB-INF/lib/org.postgresql_postgresql-42.5.0.jar -Xss2048k -Xmx2g synchrony.core sql

Workaround

Create a symbolic link for synchrony-args.properties under Confluence shared home:

1. In each cluster node create a file named synchrony-args.properties with the required options for the Synchrony process in that node
2. Delete the copy of synchrony-args.properties from Confluence shared home
3. Create a sym link pointing to synchrony-args.properties copy located in Confluence home under Confluence shared home

   # Below example is based on these conditions:
   # 1. Confluence home is /var/atlassian/application-data/confluence/
   # 2. Confluence shared home is /var/atlassian/application-data/confluence/shared-home
   
   sudo ln -s /var/atlassian/application-data/confluence/synchrony-args.properties /var/atlassian/application-data/confluence/shared-home/synchrony-args.properties
   
   # Required for docker as Confluence user id is set to 2002, change the value 2002 to the appropriate username/userid
   
   sudo chown 2002:2002 /var/atlassian/application-data/confluence/shared-home/synchrony-args.properties
   

Notes