Amazon OpenSearch Service Stuck at Modifying

Question

I had an Amazon OpenSearch Service with 3 t3.small.search data nodes of 10 GB each. The nodes went missing yesterday. When I checked in the notifications, the nodes were full for sometime and had high CPU usage above 85%. So I decided to upgrade and try to see if I can recover the data later. Upgrade to 2 m5.large.search data nodes with 50GB storage was requested yesterday and now it is still stuck at Modefying -> Applying changes. I have no way of checking the error or troubleshoot why it has failed. How do I get this up again and try to recover from now missing data nodes

Oleksii Bebych EXPERT
a month ago
please accept the answer if it was useful

Oleksii Bebych · Answer

Try this guide. It's about "stuck in the Processing state", but anyway it's the best way to start troubleshooting

https://repost.aws/knowledge-center/opensearch-domain-stuck-processing

If it does not help, you should create a Technical Support case (if data is important and you can not just recreate the cluster)
In case you have not yet a Support subscription, consider to upgrade to [Developer Support or Business support](https://aws.amazon.com/premiumsupport/plans/) depending on the urgency of your case.

Amazon OpenSearch Service Stuck at Modifying

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