4-1 - Unsupported protocol
Possible Reason
This situation may occur in the scenario of custom Protocol. Dubbo’s SPI mechanism cannot find the Protocol specified in the URL.
Troubleshooting and resolution steps
- Make sure that the Consumer has dependencies on the Protocol used by the server.
- Make sure that the name of the SPI configuration file of the Protocol’s dependent package is correct.
see also
Protocol Extension Description
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Last modified January 3, 2023: Merge error code 3-3 to 3-8, 6-4 to 99-0. (#1796) (a687d30ae)