Cluster service was closed while waiting for mapping updates – How to solve this Elasticsearch exception

Opster Team

August-23, Version: 7.16-8.9

Briefly, this error occurs when Elasticsearch is trying to update the mapping of an index, but the cluster service gets closed during the process. This could be due to a sudden shutdown or a network issue. To resolve this, you can try restarting the Elasticsearch service. If the problem persists, check the cluster’s health and network connectivity. Also, ensure that the mapping update doesn’t exceed the cluster’s capacity, as this could cause the service to close. If necessary, consider optimizing your mappings or increasing the cluster’s resources.

This guide will help you check for common problems that cause the log ” cluster service was closed while waiting for mapping updates ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: mapping, recovery, indices, cluster.

Log Context

Log “cluster service was closed while waiting for mapping updates” class name is We extracted the following from Elasticsearch source code for those seeking an in-depth context :

 }  @Override
 public void onClusterServiceClose() {
 listener.onFailure(new ElasticsearchException("cluster service was closed while waiting for mapping updates"));
 }  @Override
 public void onTimeout(TimeValue timeout) {
 // note that we do not use a timeout (see comment above)


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