Client-side connection error introduced in MySQL 8.0.33 signaling that the client probe could not connect to the defined source host or port.
MySQL Error 2025: CR_PROBE_SOURCE_CONNECT is a client connection failure added in MySQL 8.0.33. It appears when the client probe cannot reach the source host or port, often due to firewalls, wrong host names, or port misuse. Verify network reachability, correct connection parameters, and restart the client to fix the issue.
Error connecting to source: CR_PROBE_SOURCE_CONNECT was added in 8.0.33.
Error 2025 appears when the client library attempts an internal probe and cannot open a TCP connection to the source defined in the connection string. The error was introduced in MySQL 8.0.33 to provide clearer diagnostics for unreachable hosts.
The error fires during the initial handshake phase before authentication.
Any mismatch between client host parameters and reachable network endpoints will trigger the probe failure message.
Connection failures halt application traffic, break data pipelines, and can mask deeper infrastructure issues. Fast remediation restores service levels and prevents cascading timeouts in dependent services.
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Not always. The server may be healthy but unreachable due to firewalls or wrong DNS.
It is classified as a client error because the client library raises it when it cannot establish a socket.
Yes. Galaxy stores and shares validated connection profiles, reducing typo-induced failures and simplifying team-wide connection updates.
Versions 8.0.33 and later include the CR_PROBE_SOURCE_CONNECT enumeration.
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