Updating ILM operation mode to – How to solve related issues

Opster Team

Feb-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 ” Updating ILM operation mode to ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: plugin and task.

Log Context

Log “updating ILM operation mode to {}” classname is OperationModeUpdateTask.java.
We extracted the following from Elasticsearch source code for those seeking an in-depth context :

         } else {
            newMode = currentMetadata.getOperationMode();

        if (newMode.equals(ilmMode) == false) {
            logger.info("updating ILM operation mode to {}"; newMode);
        return ClusterState.builder(currentState)
                        new IndexLifecycleMetadata(currentMetadata.getPolicyMetadatas(); newMode)))


Watch product tour

Try AutoOps to find & fix Elasticsearch problems

Analyze Your Cluster
Skip to content