Servers not forming a cluster after making shared folder shared

[sgoru]

Able to hit the servers individually but not able to form the cluster. Have used AWS EFS to share the shared directory across two nodes. Have installed 7.6.7 version. 

021-06-18 11:19:09,255 INFO [Caesium-1-1] c.a.b.i.s.i.jobs.StartupChecksJob Running startup jobs for search
2021-06-18 11:19:09,294 WARN [Caesium-1-1] c.a.b.i.s.i.IndexingSynchronizationService Unable to establish a connection to Elasticsearch during index synchronisation.
2021-06-18 11:19:09,294 WARN [Caesium-1-1] c.a.b.i.s.c.cluster.ClusterJobRunner Job execution failed. Rescheduling. Job key: com.atlassian.bitbucket.internal.search.indexing.jobs.StartupChecksJob Job id: 5f755bcf-cf35-4558-8464-a162e28f27e2

Any assistance is helpful.