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fix: retry with SSL on IOException when sslMode=ALLOW - #3973
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When sslMode=ALLOW, the driver tries plaintext first and upgrades to SSL if the server rejects the connection. On Windows, PostgreSQL may reset the connection (IOException) instead of sending a FATAL auth error (SQLException with INVALID_AUTHORIZATION_SPECIFICATION). This caused the ALLOW flow to fail instead of upgrading to SSL. Extract tryConnectWithSsl helper (mirrors tryConnectWithoutSsl) and handle IOException for ALLOW in the same catch block as PREFER. Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
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When
sslMode=ALLOW, the driver tries plaintext first and upgrades to SSL if the server rejects the connection. On Windows, PostgreSQL may reset the connection (IOException) instead of sending a FATAL auth error (SQLExceptionwithINVALID_AUTHORIZATION_SPECIFICATION). This caused theALLOWflow to fail instead of upgrading to SSL.Extract
tryConnectWithSslhelper (mirrorstryConnectWithoutSsl) and handleIOExceptionforALLOWin the same catch block asPREFER.