Policy must not be null – How to solve this Elasticsearch error

Opster Team

July-20, Version: 1.7-8.0

Before you begin reading this guide, we recommend you try running the Elasticsearch Error Check-Up which analyzes 2 JSON files to detect many configuration 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 ” policy must not be null ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: plugin.

Log Context

Log “policy must not be null”classname  is LifecyclePolicyUtils.java We extracted the following from Elasticsearch source code for those seeking an in-depth context :

 * Parses and validates that the source is not empty.
 private static void validate(BytesReference source) {
 if (source == null) {
 throw new ElasticsearchParseException("policy must not be null");
 try {
 XContentHelper.convertToMap(source; false; XContentType.JSON).v2();
 } catch (NotXContentException e) {


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