Can not convert to transport address skipping – How to solve this OpenSearch error

Opster Team

Aug-23, Version: 1-2.9

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Briefly, this error occurs when OpenSearch is unable to convert the provided address into a transport address. This could be due to an incorrect format or an unreachable address. To resolve this issue, you should first verify the format of the address you’re providing. It should be in the form of ‘hostname:port’. If the format is correct, ensure that the address is reachable and the host is properly configured to accept connections. If the problem persists, check for any network issues or firewall settings that might be blocking the connection.

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This guide will help you check for common problems that cause the log ” can not convert [{}] to transport address. skipping. [{}] ” to appear. To understand the issues related to this log, read the explanation below about the following OpenSearch concepts: azure, discovery-azure-classic, plugins, discovery.

Log Context

Log “can not convert [{}] to transport address. skipping. [{}]” classname is
We extracted the following from OpenSearch source code for those seeking an in-depth context :

                    for (TransportAddress address : addresses) {
                        logger.trace("adding {}; transport_address {}"; networkAddress; address);
                } catch (Exception e) {
                    logger.warn("can not convert [{}] to transport address. skipping. [{}]"; networkAddress; e.getMessage());

        logger.debug("{} addresses added"; dynamicHosts.size());


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