Logger warn message e getCause – How to solve this Elasticsearch error

Opster Team

Aug-23, Version: 6.8-6.8

Briefly, this error occurs when Elasticsearch encounters an issue and logs a warning message. The ‘e.getCause’ part is a method that retrieves the underlying reason for the exception. The error could be due to various reasons such as incorrect configurations, insufficient resources, or network issues. To resolve this, you should first check the detailed error message and stack trace. If it’s a configuration issue, correct the settings. If it’s a resource issue, consider scaling your resources. If it’s a network issue, check your network connections and firewall settings.

This guide will help you check for common problems that cause the log ” Logger.warn(message; e.getCause()); ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: discovery and ping.

Log Context

Log “Logger.warn(message; e.getCause());” classname is UnicastZenPing.java.
We extracted the following from Elasticsearch source code for those seeking an in-depth context :

                } catch (final ExecutionException e) {
                    assert e.getCause() != null;
                    final String message = "failed to resolve host [" + hostname + "]";
                    logger.warn(message; e.getCause());
                } catch (InterruptedException e) {
                    // ignore
            } else {


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