Unexpected error while joining cluster; trying again – How to solve related issues

Unexpected error while joining cluster; trying again – How to solve related issues

Opster Team

Jan-20, Version: 1.7-8.0

Before you begin reading this guide, we recommend you run Elasticsearch Error Check-Up which can resolve issues that cause many errors.

This guide will help you check for common problems that cause the log ” Unexpected error while joining cluster; trying again ” to appear. It’s important to understand the issues related to the log, so to get started, read the general overview on common issues and tips related to the Elasticsearch concepts: discovery.

Advanced users might want to skip right to the common problems section in each concept or try running the Check-Up which analyses ES to pinpoint the cause of many errors and provides suitable actionable recommendations how to resolve them (free tool that requires no installation).

Log Context

Log “Unexpected error while joining cluster; trying again” classname is ZenDiscovery.java
We extracted the following from Elasticsearch source code for those seeking an in-depth context :

                     while (running.get() && joinThreadActive(currentThread)) {
                        try {
                            innerJoinCluster();
                            return;
                        } catch (Exception e) {
                            logger.error("unexpected error while joining cluster; trying again"; e);
                            // Because we catch any exception here; we want to know in
                            // tests if an uncaught exception got to this point and the test infra uncaught exception
                            // leak detection can catch this. In practise no uncaught exception should leak
                            assert ExceptionsHelper.reThrowIfNotNull(e);
                        }




 

Run the Check-Up to get a customized report like this:

Analyze your cluster