Set locale to en_US prior to server startup

Author: wendigo

core/trino-main/src/main/java/io/trino/server/Server.java

@@ -74,6 +74,7 @@
 import java.nio.file.Paths;
 import java.util.Collection;
 import java.util.List;
+import java.util.Locale;
 import java.util.Optional;
 import java.util.Set;
 
@@ -95,6 +96,10 @@ public final void start(String trinoVersion)
 
     private void doStart(String trinoVersion)
     {
+        // Trino server behavior does not depend on locale settings.
+        // Use en_US as this is what Trino is tested with.
+        Locale.setDefault(Locale.US);
+
         long startTime = System.nanoTime();
         verifyJvmRequirements();
         verifySystemTimeIsReasonable();

core/trino-main/src/main/java/io/trino/server/testing/TestingTrinoServer.java

@@ -126,6 +126,7 @@
 import java.time.Instant;
 import java.util.HashMap;
 import java.util.List;
+import java.util.Locale;
 import java.util.Map;
 import java.util.Optional;
 import java.util.concurrent.CountDownLatch;
@@ -152,6 +153,10 @@ public class TestingTrinoServer
         Logging logging = Logging.initialize();
         logging.setLevel("io.trino.event.QueryMonitor", Level.ERROR);
         logging.setLevel("org.eclipse.jetty", Level.ERROR);
+
+        // Trino server behavior does not depend on locale settings.
+        // Use en_US as this is what Trino is tested with.
+        Locale.setDefault(Locale.US);
     }
 
     public static final String SESSION_START_TIME_PROPERTY = "session_start_time";