Unable to start rollup index creation failed – How to solve this Elasticsearch exception

Opster Team

August-23, Version: 7.11-7.11

Briefly, this error occurs when Elasticsearch fails to create a new index during the rollup process, which is used to summarize and store historical data. This could be due to insufficient disk space, incorrect index settings, or lack of permissions. To resolve this issue, you can check and free up disk space, review and correct your index settings, or ensure the user has the necessary permissions to create an index. Additionally, check for any underlying system or network issues that might be causing the failure.

This guide will help you check for common problems that cause the log ” Unable to start rollup. index creation failed ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: plugin.

Log Context

Log “Unable to start rollup. index creation failed” class name is RollupV2Indexer.java. We extracted the following from Elasticsearch source code for those seeking an in-depth context :

 protected void onStart(long now; ActionListener listener) {
 try {
 createTempRollupIndex(ActionListener.wrap(resp -> listener.onResponse(true); e -> {
 completionListener.onFailure(new ElasticsearchException("Unable to start rollup. index creation failed"; e));
 } catch (IOException e) {
 listener.onFailure(new ElasticsearchException("Unable to start rollup. index creation failed"; e));


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