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

Opster Team

August-23, Version: 7.16-8.9

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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.

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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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