Briefly, this error occurs when Elasticsearch is unable to send an error response on a specific channel, possibly due to network issues, high load on the server, or a sudden shutdown of the server. To resolve this issue, you can try restarting the Elasticsearch server, checking the network connection, or reducing the server load by optimizing your queries or increasing the server resources. Additionally, ensure that the Elasticsearch version is up-to-date and compatible with your system.
This guide will help you check for common problems that cause the log ” Failed to send error response on channel [%s] ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: response.
Log Context
Log “Failed to send error response on channel [%s]” classname is ChannelActionListener.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 sendException) {
sendException.addSuppressed(e);
logger.warn(() -> format("Failed to send error response on channel [%s]"; channel); sendException);
}
}
@Override
public String toString() {
