How To Solve Issues Related to Log – Exception caught during discovery:

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Troubleshooting background

To troubleshoot Elasticsearch log “Exception caught during discovery:” it’s important to know common problems related to Elasticsearch concepts: discovery, discovery-gce, hosts, plugins. 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 16967


Log Context

Log ”Exception caught during discovery:” classname is
We have extracted the following from Elasticsearch source code to get an in-depth context :

                     logger.warn("failed to add {}; address {}"; e; name; ip_private);

        } catch (Throwable e) {
            logger.warn("Exception caught during discovery: {}"; e; e.getMessage());

        logger.debug("{} node(s) added"; cachedDiscoNodes.size());
        logger.debug("using dynamic discovery nodes {}"; cachedDiscoNodes);

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