Versions (relevant - OpenSearch/Dashboard/Server OS/Browser): bitnami/opensearch 2.15.0-debian-12-r4 Describe the issue: We have configured an OpenSearch cluster with 3 master nodes and 6 data nodes. The data is being indexed normally, and everything appears to be functioning without issues. H…

Does your cluster use ingress for connecting from users to cluster itself through 80 or 443 port? ex. https://[cluster_name].[domain]

We access it only internally within the Kubernetes cluster via a NodePort service. For example, using: https://common-opensearch:9200 or https://common-opensearch .{namespace}:9200 [이미지 (1)] I checked the logs of the services, and the same SSL exception connection reset error is occurring. Is…

Looks like I’ve found the same bug issue. [BUG] Continuous SSL exceptions post upgrade from 2.11 to 2.15 opened 10:05AM - 16 Aug 24 UTC (UTC) [blueish-eyez] blueish-eyez …

[image] kkoki: Is the cause of the problem on the client trying to connect to the master, rather than within the cluster itself? Yes, this is purely on HTTP client / server communication side. We are struggling to reproduce the issue, I am wondering if you have an opportunity to try previous …

I have tested as follows. An error occurs regardless of the version… :smiling_face_with_tear: 2.16.0-debian-12-r0 → ERROR 2.14.0-debian-12-r2 → ERROR 2.13.0-debian-12-r3 → ERROR For your reference, the exporter is obtaining stat information via HTTP requests to OpenSearch for monitoring purposes…

It seems that the error does not occur when the service(prometheuscommunity/elasticsearch-exporter:v1.8.0) in use is stopped.

For your reference, the error only occurs on the three master nodes in my case.

Thank you @kkoki , the presence of elasticsearch-exporter could give a hit, do you mind if I update [1] with your comments (or if you could do that, would be much appreciated). Thank you. [1] [BUG] Continuous SSL exceptions post upgrade from 2.11 to 2.15 · Issue #4718 · opensearch-project/security…

Yes. It doesn’t matter. Thank you Additionally, here is our exporter configuration. There are error logs in OpenSearch, but it seems that the data is being collected properly. [image]

@kkoki @reta I am observing similar issues in my Opensearch 3.0 cluster. Randomly the master nodes which were healthy are going into crashloopbackoff error. The error i am getting is : [2025-07-02T08:20:38,891][WARN ][o.o.t.TcpTransport ] [opensearch-master-2] exception caught on transport layer …

SSL Exception Connection Reset Error on Master Nodes

OpenSearch

pablo July 9, 2025, 8:51am 14

@shs_tech Is this the same issue as in your other thread?

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SSL connection error OpenSearch	10	2738	August 19, 2024
Node timeout/crash, will not resync, has to be killed OpenSearch troubleshoot	3	240	December 11, 2025
java.lang.IllegalStateException: transport not ready yet to handle incoming requests - Opensearch 3.0.0 OpenSearch troubleshoot	7	228	August 7, 2025
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SSL Exception Connection Reset Error on Master Nodes

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