How To Solve Issues Related to Log – Failed to handle exception for action ; handler

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Updated: Feb-20

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Log Context
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Troubleshooting background

To troubleshoot Elasticsearch log “Failed to handle exception for action ; handler” it’s important to understand common problems related to Elasticsearch concepts: handler. 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 15148  

2 Failed To List Shard For Shard Stor    


Log Context

Log ” failed to handle exception for action [{}]; handler [{}]” classname is TransportService.java
We have extracted the following from Elasticsearch source code to get an in-depth context :

 
        protected void processException(final TransportResponseHandler handler; final RemoteTransportException rtx) {
            try {
                handler.handleException(rtx);
            } catch (Throwable e) {
                logger.error("failed to handle exception for action [{}]; handler [{}]"; e; action; handler);
            }
        }

        
Override
        public long getRequestId() {





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