Failed to refresh-mapping in cluster state types – How to solve this Elasticsearch error

Opster Team

Aug-23, Version: 1.7-1.7

Briefly, this error occurs when Elasticsearch is unable to update the mapping of indices in the cluster state. This could be due to a variety of reasons such as insufficient permissions, network issues, or a heavy load on the cluster. To resolve this issue, you can try the following: 1) Check and adjust the user permissions, 2) Verify the network connectivity between nodes, 3) Reduce the load on the cluster by optimizing queries or increasing resources, and 4) Ensure that the cluster state is not exceeding the maximum size limit.

In addition we recommend you run the Elasticsearch Template Optimizer to fix problems in your data modeling.

It will analyze your templates to detect issues and improve search performance, reduce indexing bottlenecks and optimize storage utilization. The Template Optimizer is free and requires no installation.

Log Context

Log “[{}] failed to refresh-mapping in cluster state; types [{}]” classname is
We extracted the following from Elasticsearch source code for those seeking an in-depth context :


                    logger.warn("[{}] re-syncing mappings with cluster state for types [{}]"; index; updatedTypes);
                    dirty = true;
                } catch (Throwable t) {
                    logger.warn("[{}] failed to refresh-mapping in cluster state; types [{}]"; index; refreshTask.types);
            } else if (task instanceof UpdateTask) {
                UpdateTask updateTask = (UpdateTask) task;
                try {
                    String type = updateTask.type;


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