JsonJacksonCoded do not override provided objectMapper settings.

pom.xml

@@ -18,7 +18,7 @@
 
     <properties>
         <maven.test.skip>true</maven.test.skip>
-        <source.version>1.6</source.version>
+        <source.version>1.8</source.version>
         <test.source.version>1.8</test.source.version>
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
     </properties>

redisson/src/main/java/org/redisson/codec/JsonJacksonCodec.java

@@ -103,9 +103,9 @@ public class JsonJacksonCodec implements Codec {
     }
 
     public JsonJacksonCodec(ObjectMapper mapObjectMapper) {
-        this.mapObjectMapper = mapObjectMapper;
+        this.mapObjectMapper = mapObjectMapper.copy();
-        init(mapObjectMapper);
+        init(this.mapObjectMapper);
-        initTypeInclusion(mapObjectMapper);
+        initTypeInclusion(this.mapObjectMapper);
     }
 
     protected void initTypeInclusion(ObjectMapper mapObjectMapper) {

redisson/src/test/java/org/redisson/codec/JsonJacksonCodecTest.java

@@ -2,6 +2,8 @@ package org.redisson.codec;
 
 import java.io.IOException;
 
+import com.fasterxml.jackson.databind.DeserializationFeature;
+import com.fasterxml.jackson.databind.ObjectMapper;
 import org.junit.Assert;
 import org.junit.Test;
 
@@ -34,4 +36,17 @@ public class JsonJacksonCodecTest {
         Assert.fail("Should not pass");
     }
 
+    @Test
+    public void shouldNotOverrideProvidedObjectMapperProperties() throws Exception {
+        ObjectMapper objectMapper = new ObjectMapper();
+        objectMapper.configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, true);
+        objectMapper.configure(DeserializationFeature.UNWRAP_ROOT_VALUE, false);
+        JsonJacksonCodec codec = new JsonJacksonCodec(objectMapper);
+
+        Assert.assertTrue(objectMapper.getDeserializationConfig().isEnabled(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES));
+        Assert.assertFalse(codec.getObjectMapper().getDeserializationConfig().isEnabled(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES));
+
+        Assert.assertFalse(objectMapper.getDeserializationConfig().isEnabled(DeserializationFeature.UNWRAP_ROOT_VALUE));
+        Assert.assertFalse(codec.getObjectMapper().getDeserializationConfig().isEnabled(DeserializationFeature.UNWRAP_ROOT_VALUE));
+    }
 }