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

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Updated: Feb-20

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Troubleshooting Background       
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Log Context
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Troubleshooting background

To troubleshoot Elasticsearch log “Failed to notify response handler on exception” it’s important to understand common problems related to Elasticsearch concepts: handler, response. See detailed explanations below 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 :

1 Github Issue Number 22551  

2 Failed To Deserialize Exception Res    


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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