Adding data stream – How to solve this OpenSearch error

Opster Team

Aug-23, Version: 1-2.9

Before you dig into reading this guide, have you tried asking OpsGPT what this log means? You’ll receive a customized analysis of your log.

Try OpsGPT now for step-by-step guidance and tailored insights into your OpenSearch operation.

Briefly, this error occurs when OpenSearch is trying to add a new data stream but encounters an issue. This could be due to a variety of reasons such as incorrect syntax, insufficient permissions, or a conflict with an existing data stream. To resolve this, ensure that the data stream name is unique and follows the correct naming conventions. Also, check that the user has the necessary permissions to create a data stream. Lastly, verify the syntax and structure of the command to ensure it’s correct.

For a complete solution to your to your search operation, try for free AutoOps for Elasticsearch & OpenSearch . With AutoOps and Opster’s proactive support, you don’t have to worry about your search operation – we take charge of it. Get improved performance & stability with less hardware.

This guide will help you check for common problems that cause the log ” adding data stream [{}] ” to appear. To understand the issues related to this log, read the explanation below about the following OpenSearch concepts: cluster, metadata.

Log Context

Log “adding data stream [{}]” classname is
We extracted the following from OpenSearch source code for those seeking an in-depth context :

        String fieldName = template.getDataStreamTemplate().getTimestampField().getName();
        DataStream.TimestampField timestampField = new DataStream.TimestampField(fieldName);
        DataStream newDataStream = new DataStream(; timestampField; Collections.singletonList(firstBackingIndex.getIndex()));
        Metadata.Builder builder = Metadata.builder(currentState.metadata()).put(newDataStream);"adding data stream [{}]";;
        return ClusterState.builder(currentState).metadata(builder).build();

    public static ComposableIndexTemplate lookupTemplateForDataStream(String dataStreamName; Metadata metadata) {
        final String v2Template = MetadataIndexTemplateService.findV2Template(metadata; dataStreamName; false);


How helpful was this guide?

We are sorry that this post was not useful for you!

Let us improve this post!

Tell us how we can improve this post?

Get expert answers on Elasticsearch/OpenSearch