Description:
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This problem block all PHP script response if trying to connect a 4D SQL Server which is stopped or called from a wrong address, even in a try catch block.

Reproduce code:
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$dbh = new PDO('4D:host=127.0.0.2', 'test', 'test');

Expected result:
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it should be stop after timedout and provide an error with an SQLSTATE like :

08S01 	Communication link failure


Actual result:
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infinite wait