Briefly, this error occurs when Elasticsearch tries to handle a response but cannot find the corresponding handler for the given id. This usually happens due to network issues, causing the response to arrive after the request has timed out or been cancelled. To resolve this, you can increase the timeout settings, ensure stable network connectivity, or check for heavy load on the Elasticsearch cluster that might be causing delays. Also, ensure that your Elasticsearch version is up-to-date as this issue can be related to bugs in older versions.
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 Elasticsearch concepts: response, handler.
Log Context
Log “Transport response handler not found of id [{}]” classname is TransportService.java.
We extracted the following from Elasticsearch source code for those seeking an in-depth context :
requestId
);
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) {
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