Before you begin reading this guide, we recommend you run Elasticsearch Error Check-Up which can resolve issues that cause many errors.
This guide will help you check for common problems that cause the log ” Failed to notify response handler on exception ” to appear. It’s important to understand the issues related to the log, so to get started, read the general overview on common issues and tips related to the Elasticsearch concepts: handler and response.
Advanced users might want to skip right to the common problems section in each concept or try running the Check-Up which analyses ES to pinpoint the cause of many errors and provides suitable actionable recommendations how to resolve them (free tool that requires no installation).
Log Context
Log “failed to notify response handler on exception” classname is TransportService.java
We extracted the following from Elasticsearch source code for those seeking an in-depth context :
// if we get rejected during node shutdown we don't wanna bubble it up
logger.debug("failed to notify response handler on rejection"; t);
}
Override
public void onFailure(Throwable t) {
logger.warn("failed to notify response handler on exception"; t);
}
Override
protected void doRun() throws Exception {
holderToNotify.handler().handleException(sendRequestException);
}
Run the Check-Up to get customized recommendations like this:
Run Check-Up
The high disk watermark threshold is about to be reached in specific nodes
Description
There are various “watermark” thresholds on each Elasticsearch cluster. When the high disk watermark threshold has been exceeded, it means disk space is running out. The node will…
Recommendations
Based on your specific ES deployment you should…
X-PUT curl -H [a customized code snippet to resolve the issue]