How To Solve Issues Related to Log – Error sending cluster state to

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Troubleshooting Background – start here to get the full picture       
Related Issues – selected resources on related issues  
Log Context – usefull for experts
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Troubleshooting background

To troubleshoot Elasticsearch log “Error sending cluster state to” it’s important to know common problems related to Elasticsearch concepts: cluster, discovery. See below-detailed explanations complete with common problems, examples and useful tips.

Cluster in Elasticsearch

What is it

In Elasticsearch a cluster is a collection of one or more nodes (servers / VMs). A cluster can consist of an unlimited number of nodes. The cluster provides interface for indexing and storing data and search capability across all of the data which is stored in the data nodes

Each cluster has a single master node that is elected by the master eligible nodes. In cases where the master is not available the other connected master eligible nodes elect a new master. Clusters are identified by a unique name, which defaults to “Elasticsearch”.


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 :

Failed To Send Cluster State
discuss.elastic.co/t/failed-to-send-cluster-state/4489

 

Github Issue Number 30731
github.com/elastic/elasticsearch/issues/30731

 


Log Context

Log ”Error sending cluster state to” classname is PublishClusterStateAction.java
We have extracted the following from Elasticsearch source code to get an in-depth context :

                                 sendingController.onNodeSendFailed(node; exp);
                            }
                        }
                    });
        } catch (Exception e) {
            logger.warn(() -> new ParameterizedMessage("error sending cluster state to {}"; node); e);
            sendingController.onNodeSendFailed(node; e);
        }
    }

    private void sendCommitToNode(final DiscoveryNode node; final ClusterState clusterState; final SendingController sendingController) {






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