Issue Summary

When migrating from Lucene to OpenSearch and starting a new node configured to use OpenSearch, the node will fail to start successfully i.e. it's /status endpoint will return a 500. This is due to the Index consistency check failing due to the default 10% fault tolerance.

Steps to Reproduce

1. Configure a new Jira node to use OpenSearch
2. Start the node in an existing cluster (i.e. one which has many projects and issues)

Expected Results

The node starts up and can accept traffic

Actual Results

The node returns a 500 on the /status endpoint, preventing it from starting up successfully.

The below INFO log entry is found in the atlassian-jira.log file:

Index consistency check finished. indexConsistent: false; timeToCheckIndexConsistency:...

Workaround

Set -Dcom.atlassian.jira.index.consistency.tolerance.percentage=100 on the OpenSearch configured node and restart.