Briefly, this error occurs when Elasticsearch is unable to send an exception response for a specific action due to network issues, node failures, or resource constraints. To resolve this issue, you can try the following: 1) Check the network connectivity between the nodes. 2) Ensure that the Elasticsearch cluster has sufficient resources (CPU, memory, disk space). 3) Check the health of the nodes and replace any that are failing. 4) Review the action causing the exception and fix any errors in it. 5) Upgrade Elasticsearch to the latest version, as this may be a bug that has been fixed.
This guide will help you check for common problems that cause the log ” failed to send exception response for action [” + action + “] ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: plugin, response.
Log Context
Log “failed to send exception response for action [” + action + “]” classname is SecurityServerTransportInterceptor.java.
We extracted the following from Elasticsearch source code for those seeking an in-depth context :
public void onFailure(Exception e) {
try {
channel.sendResponse(e);
} catch (Exception e1) {
e1.addSuppressed(e);
logger.warn("failed to send exception response for action [" + action + "]"; e1);
}
}
@Override
protected void doRun() throws Exception {
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