Polish "Set Lettuce shutdown timeout properly"

Closes gh-9526

spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/data/redis/RedisAutoConfigurationTests.java

@@ -73,14 +73,14 @@ public class RedisAutoConfigurationTests {
 	@Test
 	public void testOverrideRedisConfiguration() {
 		load("spring.redis.host:foo", "spring.redis.database:1",
-				"spring.redis.lettuce.shutdown-timeout:100");
+				"spring.redis.lettuce.shutdown-timeout:500");
 		LettuceConnectionFactory cf = this.context
 				.getBean(LettuceConnectionFactory.class);
 		assertThat(cf.getHostName()).isEqualTo("foo");
 		assertThat(cf.getDatabase()).isEqualTo(1);
 		assertThat(cf.getPassword()).isNull();
 		assertThat(cf.isUseSsl()).isFalse();
-		assertThat(cf.getShutdownTimeout()).isEqualTo(100);
+		assertThat(cf.getShutdownTimeout()).isEqualTo(500);
 	}
 
 	@Test
@@ -121,16 +121,16 @@ public class RedisAutoConfigurationTests {
 				"spring.redis.lettuce.pool.max-idle:4",
 				"spring.redis.lettuce.pool.max-active:16",
 				"spring.redis.lettuce.pool.max-wait:2000",
-				"spring.redis.lettuce.shutdown-timeout:100");
+				"spring.redis.lettuce.shutdown-timeout:1000");
 		LettuceConnectionFactory cf = this.context
 				.getBean(LettuceConnectionFactory.class);
-		assertThat(cf.getShutdownTimeout()).isEqualTo(100);
 		assertThat(getDefaultLettucePool(cf).getHostName()).isEqualTo("foo");
 		assertThat(getDefaultLettucePool(cf).getPoolConfig().getMinIdle()).isEqualTo(1);
 		assertThat(getDefaultLettucePool(cf).getPoolConfig().getMaxIdle()).isEqualTo(4);
 		assertThat(getDefaultLettucePool(cf).getPoolConfig().getMaxTotal()).isEqualTo(16);
 		assertThat(getDefaultLettucePool(cf).getPoolConfig().getMaxWaitMillis())
 				.isEqualTo(2000);
+		assertThat(cf.getShutdownTimeout()).isEqualTo(1000);
 	}
 
 	@Test

spring-boot-docs/src/main/asciidoc/appendix-application-properties.adoc

@@ -886,7 +886,7 @@ content into your application; rather pick only the properties that you need.
 	spring.redis.lettuce.pool.max-idle=8 # Max number of "idle" connections in the pool. Use a negative value to indicate an unlimited number of idle connections.
 	spring.redis.lettuce.pool.max-wait=-1 # Maximum amount of time (in milliseconds) a connection allocation should block before throwing an exception when the pool is exhausted. Use a negative value to block indefinitely.
 	spring.redis.lettuce.pool.min-idle=0 # Target for the minimum number of idle connections to maintain in the pool. This setting only has an effect if it is positive.
-	spring.redis.lettuce.shutdown-timeout=2000 # Shutdown timeout in milliseconds.
+	spring.redis.lettuce.shutdown-timeout=100 # Shutdown timeout in milliseconds.
 	spring.redis.password= # Login password of the redis server.
 	spring.redis.port=6379 # Redis server port.
 	spring.redis.sentinel.master= # Name of Redis server.