Jackson databind blackbird module v2.12.1 support for Java8

Question

I recently updated my jackson-databind module from 2.11.1 to 2.12.1 and in the documentation i found that it is recommended to use blackbird module instead of afterburner. But after upgaridng i am getting this error

com.fasterxml.jackson.module.blackbird.BlackbirdModule Unable to find Java 9+ MethodHandles.privateLookupIn.  Blackbird is not performing optimally! - @ ->  
java.lang.NoSuchMethodException: no such method: java.lang.invoke.MethodHandles.privateLookupIn(Class,Lookup)Lookup/invokeStatic

So i wanted to know is there a way to use blackbird with java8.

My pom.xml entries for jackson dependencies looks like below

    <jackson.version>2.12.1</jackson.version> <!-- https://github.com/FasterXML/jackson-core/blob/master/release-notes/VERSION-2.x -->
        <jackson-databind.version>2.12.1</jackson-databind.version>    
<dependency>
                <groupId>com.fasterxml.jackson.core</groupId>
                <artifactId>jackson-databind</artifactId>
                <version>${jackson-databind.version}</version>
            </dependency>
            <dependency>
                <groupId>com.fasterxml.jackson.core</groupId>
                <artifactId>jackson-annotations</artifactId>
                <version>${jackson.version}</version>
            </dependency>
            <dependency>
                <groupId>com.fasterxml.jackson.jaxrs</groupId>
                <artifactId>jackson-jaxrs-json-provider</artifactId>
                <version>${jackson.version}</version>
            </dependency>
            <dependency>
                <groupId>com.fasterxml.jackson.datatype</groupId>
                <artifactId>jackson-datatype-jsr310</artifactId>
                <version>${jackson.version}</version>
            </dependency>
            <dependency>
                <groupId>com.fasterxml.jackson.datatype</groupId>
                <artifactId>jackson-datatype-jdk8</artifactId>
                <version>${jackson.version}</version>
            </dependency>
            <dependency>
                <groupId>com.fasterxml.jackson.module</groupId>
                <artifactId>jackson-module-blackbird</artifactId>
                <version>${jackson.version}</version>
            </dependency>
            <dependency>
                <groupId>com.fasterxml.jackson.dataformat</groupId>
                <artifactId>jackson-dataformat-xml</artifactId>
                <version>${jackson.version}</version>
            </dependency>

score 3 · Answer 1 · answered May 24 '23 at 12:10

First of all this is a warning message. Not an error and the functionality will not break. It is recommended to have java 9+ for Blackbird module because Blackbird module uses privateLookupIn method introduced in Java 9.

Even though it is compatible with Java 8, you can not get the best performance and you will get this warning message if you run in Java 8 environment.

If you want to get rid of this warning message, you need to remove Blackbird module and use the Afterburner.

score -1 · Answer 2 · edited Mar 23 '23 at 14:28

-1

I found out if you put the afterburner jar in the classpath the warning will go away.

edited Mar 23 '23 at 14:28

Yunnosch

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answered Mar 23 '23 at 14:27

Sergio Roa Espinoza

1

You generally shouldn't manually mess with the classpath's contents in a maven application. – Chry007 Mar 28 '23 at 12:33

Jackson databind blackbird module v2.12.1 support for Java8

2 Answers2