How To Solve Issues Related to Log – Failed to notify response handler on exception

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Troubleshooting Background – start here to get the full picture       
Related Issues – selected resources on related issues  
Log Context – usefull for experts
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Troubleshooting background

To troubleshoot Elasticsearch log “Failed to notify response handler on exception” it’s important to know common problems related to Elasticsearch concepts: handler, response. See below-detailed explanations complete with common problems, examples and useful tips.


To help troubleshoot related issues we have gathered selected Q&A from the community and issues from Github , please review the following for further information :

Github Issue Number 22551
github.com/elastic/elasticsearch/issues/22551

 

Failed To Deserialize Exception Res
discuss.elastic.co/t/failed-to-deserialize-exception-response-from-stream/12286

 


Log Context

Log ”Failed to notify response handler on exception” classname is TransportService.java
We have extracted the following from Elasticsearch source code to get 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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