Delaying recovery of for due to networking error – How to solve this Elasticsearch error

Opster Team

Aug-23, Version: 6.8-7.9

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Briefly, this error occurs when Elasticsearch encounters a networking issue that prevents it from recovering a shard. This could be due to network instability, firewall restrictions, or misconfigured network settings. To resolve this issue, you can check the network connectivity between the nodes, ensure that the firewall is not blocking the required ports, and verify the network settings in the Elasticsearch configuration. Additionally, check the Elasticsearch logs for more detailed information about the error. Restarting the Elasticsearch service or the entire node may also help in some cases.

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This guide will help you check for common problems that cause the log ” delaying recovery of {} for [{}] due to networking error [{}] ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: indices, recovery.

Log Context

Log “delaying recovery of {} for [{}] due to networking error [{}]” classname is
We extracted the following from Elasticsearch source code for those seeking an in-depth context :


            if (cause instanceof ConnectTransportException) {
                logger.debug("delaying recovery of {} for [{}] due to networking error [{}]"; request.shardId();
                    recoverySettings.retryDelayNetwork(); cause.getMessage());
                if (request.sourceNode().getVersion().onOrAfter(Version.V_7_9_0)) {
                    reestablishRecovery(request; cause.getMessage(); recoverySettings.retryDelayNetwork());
                } else {
                    retryRecovery(recoveryId; cause.getMessage(); recoverySettings.retryDelayNetwork();


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