AWS SQS: java.lang.NoClassDefFoundError: com/fasterxml/jackson/annotation/JsonMerge?

Question

我正尝试在我的 Java 代码中向 SQS 发送消息，如下所示：

public void pushToSQS(){

    String queueURL = "https://sqs.us-east-1.amazonaws.com/205135634997/myQueue.fifo";
    
    try {

        final AmazonSQS sqs = AmazonSQSClientBuilder.defaultClient();

        sqs.sendMessage(new SendMessageRequest(queueURL,
                "test message"));

    } catch (final AmazonServiceException e) {
        log.error("Error: " + e.getMessage());
    }
}

然而在行：final AmazonSQS sqs = AmazonSQSClientBuilder.defaultClient();

我收到错误：

java.lang.NoClassDefFoundError: com/fasterxml/jackson/annotation/JsonMerge
Caused by: java.lang.ClassNotFoundException: com.fasterxml.jackson.annotation.JsonMerge

我已将以下内容添加到我的 pom.xml：

<dependency>
            <groupId>com.amazonaws</groupId>
            <artifactId>aws-java-sdk-models</artifactId>
            <version>1.11.86</version>
        </dependency>

下面是项目中所有的jackson依赖：

在 mvn 依赖树中我可以看到：

+- org.jboss.resteasy:resteasy-multipart-provider:jar:3.0.19.Final:provided
[INFO] |  +- org.jboss.resteasy:resteasy-client:jar:3.0.19.Final:provided
[INFO] |  +- org.jboss.resteasy:resteasy-jaxb-provider:jar:2.3.5.Final:provided
[INFO] |  |  \- com.sun.xml.bind:jaxb-impl:jar:2.2.5.jboss-1:provided
[INFO] |  |     +- com.sun.istack:istack-commons-runtime:jar:2.6.1:provided
[INFO] |  |     \- com.sun.xml.txw2:txw2:jar:20110809:provided
[INFO] |  +- com.sun.mail:javax.mail:jar:1.5.5:provided
[INFO] |  \- org.apache.james:apache-mime4j:jar:0.6:provided
[INFO] \- org.jboss.resteasy:resteasy-jackson2-provider:jar:3.0.19.Final:provided
[INFO]    +- com.fasterxml.jackson.core:jackson-core:jar:2.6.3:provided
[INFO]    +- com.fasterxml.jackson.core:jackson-databind:jar:2.6.3:provided
[INFO]    +- com.fasterxml.jackson.core:jackson-annotations:jar:2.6.3:provided
[INFO]    \- com.fasterxml.jackson.jaxrs:jackson-jaxrs-json-provider:jar:2.6.3:provided
[INFO]       +- com.fasterxml.jackson.jaxrs:jackson-jaxrs-base:jar:2.6.3:provided
[INFO]       \- com.fasterxml.jackson.module:jackson-module-jaxb-annotations:jar:2.6.3:provided


[INFO] +- com.fasterxml.jackson.core:jackson-databind:jar:2.9.6:compile

导致此错误的原因是什么？

Answer 1

看起来你有两次杰克逊。考虑一下：

+- org.jboss.resteasy:resteasy-multipart-provider:jar:3.0.19.Final:provided
[INFO] \- org.jboss.resteasy:resteasy-jackson2-provider:jar:3.0.19.Final:provided
[INFO]    +- com.fasterxml.jackson.core:jackson-core:jar:2.6.3:provided
[INFO]    +- com.fasterxml.jackson.core:jackson-databind:jar:2.6.3:provided
[INFO]    +- com.fasterxml.jackson.core:jackson-annotations:jar:2.6.3:provided
[INFO]    \- com.fasterxml.jackson.jaxrs:jackson-jaxrs-json-provider:jar:2.6.3:provided
[INFO]       +- com.fasterxml.jackson.jaxrs:jackson-jaxrs-base:jar:2.6.3:provided
[INFO]       \- com.fasterxml.jackson.module:jackson-module-jaxb-annotations:jar:2.6.3:provided

还有这个：

[INFO] +- com.fasterxml.jackson.core:jackson-databind:jar:2.9.6:compile

请将顶级依赖项删除到 com.fasterxml.jackson.core:jackson-databind:jar:2.9.6 并查看它是否有效。

Answer 2

根据错误，代码正在尝试加载 'com/fasterxml/jackson/annotation/JsonMerge' 'jackson-annotations:jar:2.6.3' 中不可用.根据上面共享的 Maven 依赖项，正在引用 Jackson 库的 2.6.3 版。

但是 要求 class 存在于版本 2.9.6 中。所以建议使用2.9.6。建议在 2.9.6 版本中也使用 jackson-databind 和 jackson-core。

Answer 3

我看到 jackson-databind 和 jackson-annotations 有两个版本。在 2.9.2+ 版本中，JsonMerge 在 jackson-annotations 中可用。

使用 mvn dependency:tree 使用 Maven 依赖树查找并排除旧版本的 jackson-annotations 和 jackson:databind

AWS SQS: java.lang.NoClassDefFoundError: com/fasterxml/jackson/annotation/JsonMerge?

AWS SQS: java.lang.NoClassDefFoundError: com/fasterxml/jackson/annotation/JsonMerge?

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