AWS Opensearch - stuck in processing

There could be many reason for a Red Amazon Opensearch domain. Some examples:

• Multiple data node failures
• Using a corrupt or red shard for an index
• High JVM memory pressure or CPU utilization
• Low disk space or disk skew

Please note that is not recommended to reconfigure your domain until you first resolve the red cluster status. If you are able in term of support level, i suggest to open a ticket. moreover, take a look at the below resources:

• https://aws.amazon.com/premiumsupport/knowledge-center/opensearch-red-yellow-status/
• https://docs.aws.amazon.com/opensearch-service/latest/developerguide/handling-errors.html#handling-errors-red-cluster-status
• In general, Make sure you are following Sizing Domains Best Practices

Hope this helps!