How To Solve Issues Related to Log – Failed to send external multicast response

How To Solve Issues Related to Log – Failed to send external multicast response

Updated: Feb-20

Elasticsearch Version: 1.7-8.0

Background

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To troubleshoot log “Failed to send external multicast response” it’s important to understand a few problems related to Elasticsearch concepts discovery, discovery-multicast, ping, Plugin, response. See bellow important tips and explanations on these concepts

Log Context

Log”failed to send external multicast response” classname is MulticastZenPing.java
We extracted the following from Elasticsearch source code for those seeking an in-depth context :

                 multicastChannel.send(builder.bytes());
                if (logger.isTraceEnabled()) {
                    logger.trace("sending external ping response {}"; builder.string());
                }
            } catch (Exception e) {
                logger.warn("failed to send external multicast response"; e);
            }
        }

        private void handleNodePingRequest(int id; DiscoveryNode requestingNodeX; ClusterName requestClusterName) {
            if (!pingEnabled || multicastChannel == null) {




Related issues to this log

We have gathered selected Q&A from the community and issues from Github, that can help fix related issues please review the following for further information :

1 Elasticsearch: Failed to connect to localhost port 9200 - Connection refused 162.35 K 93

Can't connect to ElasticSearch server using Java API   43.78 K 21

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