Timed out waiting for mapping updates timeout timeout – How to solve this Elasticsearch exception

Opster Team

August-23, Version: 7.16-8.9

Briefly, this error occurs when Elasticsearch takes longer than the specified timeout period to update the mapping. This could be due to heavy indexing load, slow disk I/O, or insufficient resources. To resolve this issue, you can increase the timeout value, reduce the indexing load, optimize your disk I/O operations, or scale up your Elasticsearch cluster to provide more resources. Additionally, ensure that your mappings are not overly complex, as this can also slow down updates.

This guide will help you check for common problems that cause the log ” timed out waiting for mapping updates ” + “(timeout [” + timeout + “]) ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: mapping, recovery, indices.

Log Context

Log “timed out waiting for mapping updates ” + “(timeout [” + timeout + “])” class name is PeerRecoveryTargetService.java. We extracted the following from Elasticsearch source code for those seeking an in-depth context :

 public void onTimeout(TimeValue timeout) {
 // note that we do not use a timeout (see comment above)
 new ElasticsearchTimeoutException("timed out waiting for mapping updates " + "(timeout [" + timeout + "])")
 final IndexMetadata indexMetadata = clusterService.state().metadata().index(request.shardId().getIndex());


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