Logger.errorline – 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 analyzes 2 JSON files to detect many errors.

To easily locate the root cause and resolve this issue try AutoOps for Elasticsearch & OpenSearch. It diagnoses problems by analyzing hundreds of metrics collected by a lightweight agent and offers guidance for resolving them.

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

Log Context

Log “Logger.error(line)” classname is LicenseHeadersTask.groovy.
We extracted the following from Elasticsearch source code for those seeking an in-depth context :

             reportFile.eachLine('UTF-8') { line ->
                if (line.startsWith("*******************************")) {
                } else {
                    if (sectionNumber == 2) {
            throw new IllegalStateException("License header problems were found! Full details: " + reportFile.absolutePath)


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