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

Opster Team

Aug-23, Version: 1.2-2.9

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Briefly, this error occurs when OpenSearch takes too long to update the mapping of an index, exceeding the set timeout limit. This could be due to heavy indexing load, slow network, or insufficient resources. To resolve this, you can increase the timeout limit, reduce the indexing load by splitting it into smaller tasks, optimize your network speed, or allocate more resources to OpenSearch. Additionally, ensure that your cluster is healthy and not suffering from any underlying issues that could slow down operations.

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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 OpenSearch concepts: recovery, mapping, indices.

Log Context

Log “timed out waiting for mapping updates ” + “(timeout [” + timeout + “])” class name is PeerRecoveryTargetService.java. We extracted the following from OpenSearch 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 OpenSearchTimeoutException("timed out waiting for mapping updates " + "(timeout [" + timeout + "])")
 final IndexMetadata indexMetadata = clusterService.state().metadata().index(request.shardId().getIndex());


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