Fixing the «failed to connect to the destination cluster to get type information» error
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Updated at September 12, 2023
Issue description
When running a transfer, you see the following error message:
Cannot retrieve table information from the source database: failed to resolve storage: failed to connect to the destination cluster to get type information: unable to get master host: unable to create service-name service client: All hosts are unavailable
hostname resolving error (lookup host-name.mdb.yandexcloud.net on 127.0.0.1:53) failed to connect to `host=host-name.mdb.yandexcloud.net user= database=`: hostname resolving error
Solution
Most likely, the settings of the cloud subnet of the target cluster or source cluster in this transfer include addresses of third-party DNS servers. In this case, when running a transfer, you'll get the hostname resolving error.
For more information, see Network in Yandex Data Transfer in our documentation.
To fix this issue, you can either set up the third-party DNS servers to resolve the cluster's host names or add the cluster endpoint by its IP (as an external installation).