Failed to notify response handler on exception – How to solve related issues

Opster Team

Feb-20, Version: 1.7-8.0

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. To understand the issues related to this log, read the explanation below about the following 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 to analyze Elasticsearch configuration and help resolve this error.

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);
                    }


 

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