FTS rebalance exited with reason ; service_rebalance_failed , agent_died

Test configuration:
1. Number of Documents : 500M
2. Size of each document : 300 Bytes
3. Cluster configuration : 1KV 2 FTS nodes (initial configuration for rebalance in)
4. Index definition : here

Build used - 7.0.2-6511 

Rebalance error message : 

“completionMessage”:
“Rebalance exited with reason
{
service_rebalance_failed,fts,
{agent_died,<30508.4172.0>,

Unknown macro: {linked_process_died,<30508.4320.0>, Unknown macro}

,
60000]}}}}}}.“}

Link to the job : http://perf.jenkins.couchbase.com/job/atlas_rebal_dev/4/console
Links to the logs : 
https://s3-us-west-2.amazonaws.com/perf-artifacts/jenkins-atlas_rebal_dev-4/172.23.99.211.zip 
https://s3-us-west-2.amazonaws.com/perf-artifacts/jenkins-atlas_rebal_dev-4/172.23.99.38.zip
https://s3-us-west-2.amazonaws.com/perf-artifacts/jenkins-atlas_rebal_dev-4/172.23.99.39.zip
https://s3-us-west-2.amazonaws.com/perf-artifacts/jenkins-atlas_rebal_dev-4/172.23.99.40.zip

Changelog between 7.0.1–5998 and 7.0.2 - 6511 : Here