Assertion failure – How to solve this Elasticsearch error

Opster Team

Aug-23, Version: 6.8-8.9

Briefly, this error occurs when Elasticsearch encounters an unexpected condition or a violation of an invariant in the code. This is usually due to a bug in the code or incorrect usage of an API. To resolve this issue, you can try the following: 1) Check the Elasticsearch logs for more detailed information about the error. 2) Ensure that you are using the correct version of Elasticsearch and that your queries are compatible. 3) If the error persists, consider reporting it to the Elasticsearch community as it may be a bug.

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

Log Context

Log “^^^ Assertion failure ^^^” classname is
We extracted the following from Elasticsearch source code for those seeking an in-depth context :

        } catch (AssertionError ae) {
            if (logger != null && {
      "^^^ Assertion failure ^^^");
            throw ae;