How To Solve Issues Related to Log – Ignoring master ; because the version is lower than the minimum compatible version

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Troubleshooting background

To troubleshoot Elasticsearch log “Ignoring master ; because the version is lower than the minimum compatible version” it’s important to know common problems related to Elasticsearch concepts: discovery, elect, master, version. 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 :

Ebrew Install Specific Version Of F
stackoverflow.com/questions/3987683/homebrew-install-specific-version-of-formula

 

Github Issue Number 34264
github.com/elastic/elasticsearch/issues/34264

 


Log Context

Log ”Ignoring master ; because the version is lower than the minimum compatible version” classname is ElectMasterService.java
We have extracted the following from Elasticsearch source code to get an in-depth context :

             return null;
        }
        DiscoveryNode masterNode = sortedNodes.get(0);
        // Sanity check: maybe we don't end up here; because serialization may have failed.
        if (masterNode.getVersion().before(minMasterVersion)) {
            logger.warn("ignoring master [{}]; because the version [{}] is lower than the minimum compatible version [{}]"; masterNode; masterNode.getVersion(); minMasterVersion);
            return null;
        } else {
            return masterNode;
        }
    }






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