Transport response handler not found of id – How to solve this OpenSearch error

Opster Team

Aug-23, Version: 1-2.9

Before you dig into reading this guide, have you tried asking OpsGPT what this log means? You’ll receive a customized analysis of your log.

Try OpsGPT now for step-by-step guidance and tailored insights into your OpenSearch operation.

Briefly, this error occurs when OpenSearch cannot find a response handler for a specific transport request. This usually happens when the node that made the request has left the cluster before the response is returned, or due to network issues causing the response to be delayed or lost. To resolve this, you can check the network connectivity between your nodes, ensure that your cluster is stable and nodes are not frequently leaving or joining. Also, consider increasing the timeout settings if your requests are taking longer than expected.

For a complete solution to your to your search operation, try for free AutoOps for Elasticsearch & OpenSearch . With AutoOps and Opster’s proactive support, you don’t have to worry about your search operation – we take charge of it. Get improved performance & stability with less hardware.

This guide will help you check for common problems that cause the log ” Transport response handler not found of id [{}] ” to appear. To understand the issues related to this log, read the explanation below about the following OpenSearch concepts: response, handler.

Log Context

Log “Transport response handler not found of id [{}]” classname is
We extracted the following from OpenSearch source code for those seeking an in-depth context :

            action = timeoutInfoHolder.action();
            sourceNode = timeoutInfoHolder.node();
        } else {
            logger.warn("Transport response handler not found of id [{}]"; requestId);
            action = null;
            sourceNode = null;
        // call tracer out of lock
        if (tracerLog.isTraceEnabled() == false) {


How helpful was this guide?

We are sorry that this post was not useful for you!

Let us improve this post!

Tell us how we can improve this post?

Get expert answers on Elasticsearch/OpenSearch