Exception – How to solve this Elasticsearch error

Opster Team

Aug-23, Version: 6.8-8.3

Briefly, this error occurs when Elasticsearch encounters an unexpected situation or fails to execute a specific operation. The error message is generic and can be caused by various issues such as incorrect configurations, insufficient resources, or network problems. To resolve this, you can check the Elasticsearch logs for more detailed error messages. Ensure that your configurations are correct and that your system has enough resources (CPU, memory, disk space). Also, verify that your network settings are correct and that there are no connectivity issues.

This guide will help you check for common problems that cause the log ” Exception ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: bootstrap.

Log Context

Log “Exception” classname is Bootstrap.java.
We extracted the following from Elasticsearch source code for those seeking an in-depth context :

                    logger.error("Guice Exception: {}"; os.toString(StandardCharsets.UTF_8));
                } else if (e instanceof NodeValidationException) {
                    logger.error("node validation exception\n{}"; e.getMessage());
                } else {
                    // full exception
                    logger.error("Exception"; e);

            throw e;


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