Application using Hibernate offline startup tries to connect to database in DEV mode on startup

extensions/hibernate-orm/deployment/src/test/java/io/quarkus/hibernate/orm/offline/StartOfflineDevModeTest.java

@@ -0,0 +1,54 @@
+package io.quarkus.hibernate.orm.offline;
+
+import static org.assertj.core.api.Assertions.assertThat;
+import static org.hamcrest.Matchers.is;
+
+import jakarta.ws.rs.GET;
+import jakarta.ws.rs.Path;
+import jakarta.ws.rs.Produces;
+import jakarta.ws.rs.core.MediaType;
+
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.extension.RegisterExtension;
+
+import io.quarkus.hibernate.orm.MyEntity;
+import io.quarkus.test.QuarkusDevModeTest;
+import io.restassured.RestAssured;
+
+/**
+ * Test that an application is running
+ * even if the database is offline when the application starts
+ * in DEV mode
+ */
+public class StartOfflineDevModeTest {
+
+    @RegisterExtension
+    static QuarkusDevModeTest runner = new QuarkusDevModeTest()
+            .withApplicationRoot((jar) -> jar
+                    .addClass(MyEntity.class)
+                    .addClass(GreetingResource.class)
+                    .addAsResource("application-start-offline.properties", "application.properties"))
+            .setLogRecordPredicate(record -> true);
+
+    @Test
+    public void testUnitSchemaManagementStrategyIsNone() {
+        RestAssured.when().get("/hello").then()
+                .statusCode(200)
+                .body(is("DB is offline but application is running"));
+
+        assertThat(runner.getLogRecords())
+                .map(l -> l.getMessage())
+                .doesNotContain("Failed to run post-boot validation");
+    }
+
+    @Path("/hello")
+    public static class GreetingResource {
+
+        @GET
+        @Produces(MediaType.TEXT_PLAIN)
+        public String hello() {
+            return "DB is offline but application is running";
+        }
+    }
+
+}

extensions/hibernate-orm/runtime/src/main/java/io/quarkus/hibernate/orm/runtime/HibernateOrmRecorder.java

@@ -290,8 +290,10 @@ public void doValidation(String puName) {
         String schemaManagementStrategy = hibernateOrmRuntimeConfigPersistenceUnit.database().generation().generation()
                 .orElse(hibernateOrmRuntimeConfigPersistenceUnit.schemaManagement().strategy());
 
-        //if hibernate is already managing the schema we don't do this
-        if (!"none".equals(schemaManagementStrategy)) {
+        boolean startsOffline = hibernateOrmRuntimeConfigPersistenceUnit.database().startOffline();
+
+        //if hibernate is already managing the schema or if we're in offline mode we don't do this
+        if (!"none".equals(schemaManagementStrategy) || startsOffline) {
             return;
         }
         new Thread(new Runnable() {