Timed out after resolving host – How to solve this Elasticsearch error

Opster Team

Aug-23, Version: 6.8-7.13

Briefly, this error occurs when Elasticsearch is unable to resolve the hostname within the specified timeout period. This could be due to network issues, DNS resolution problems, or the host being down. To resolve this issue, you can try increasing the timeout period, checking the network connection, ensuring the host is up and running, or verifying the DNS settings. If the problem persists, consider checking the Elasticsearch logs for more detailed information about the error.

This guide will help you check for common problems that cause the log ” timed out after [{}] resolving host [{}] ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: discovery.

Log Context

Log “timed out after [{}] resolving host [{}]” classname is SeedHostsResolver.java.
We extracted the following from Elasticsearch source code for those seeking an in-depth context :

                } catch (InterruptedException e) {
                    // ignore
            } else {
                logger.warn("timed out after [{}] resolving host [{}]"; resolveTimeout; hostname);
        return Collections.unmodifiableList(transportAddresses);