如何解决 java.lang.NoClassDefFoundError: 在 Azure Blob 存储初始化期间

Question

我在尝试像这样初始化 Azure Blob 时得到这个java.lang.NoClassDefFoundError: Could not initialize class com.azure.sto rage.blob.implementation.util.ModelHelper

StorageSharedKeyCredential credential = new StorageSharedKeyCredential(ACCOUNT_NAME, ACCOUNT_KEY);
BlobServiceClient storageClient = new BlobServiceClientBuilder().endpoint(endpoint).credential(credential).buildClient();

如何解决这个问题？

2022-10-28 12:03:30,802 ERROR org.apache.catalina.core.ContainerBase.[Tomcat].[localhost].[/].[dispatcherServlet] - Servlet.service() for servlet [dispatcherServl
et] in context with path [] threw exception [Handler dispatch failed; nested exception is java.lang.NoClassDefFoundError: Could not initialize class com.azure.sto
rage.blob.implementation.util.ModelHelper] with root cause
java.lang.NoClassDefFoundError: Could not initialize class com.azure.storage.blob.implementation.util.ModelHelper
        at com.azure.storage.blob.BlobUrlParts.parse(BlobUrlParts.java:371) ~[azure-storage-blob-12.20.0.jar!/:12.20.0]
        at com.azure.storage.blob.BlobServiceClientBuilder.endpoint(BlobServiceClientBuilder.java:171) ~[azure-storage-blob-12.20.0.jar!/:12.20.0]

我的 pom.xml 有这些依赖

<!-- https://mvnrepository.com/artifact/com.azure/azure-storage-blob -->
        <dependency>
            <groupId>com.azure</groupId>
            <artifactId>azure-storage-blob</artifactId>
            <version>12.20.0</version>
        </dependency>

        <!-- Needed to avoid java.lang.ClassNotFoundException-->
        <!-- https://mvnrepository.com/artifact/com.azure/azure-core -->
        <dependency>
            <groupId>com.azure</groupId>
            <artifactId>azure-core</artifactId>
            <version>1.33.0</version>
        </dependency>

我也看到类似的失败，但有时会出现不同的错误消息

java.lang.ClassNotFoundException: com.fasterxml.jackson.databind.cfg.MapperBuilder
    at java.net.URLClassLoader.findClass(URLClassLoader.java:381) ~[?:1.8.0_111]
    at java.lang.ClassLoader.loadClass(ClassLoader.java:424) ~[?:1.8.0_111]
    at org.springframework.boot.loader.LaunchedURLClassLoader.loadClass(LaunchedURLClassLoader.java:94) ~[data-pipeline-automation-1.0.jar:0.0.1-SNAPSHOT]
    at java.lang.ClassLoader.loadClass(ClassLoader.java:357) ~[?:1.8.0_111]
    at com.azure.core.implementation.jackson.ObjectMapperShim.createHeaderMapper(ObjectMapperShim.java:135) ~[azure-core-1.33.0.jar!/:1.33.0]
    at com.azure.core.util.serializer.JacksonAdapter.<init>(JacksonAdapter.java:80) ~[azure-core-1.33.0.jar!/:1.33.0]
    at com.azure.core.util.serializer.JacksonAdapter.<init>(JacksonAdapter.java:58) ~[azure-core-1.33.0.jar!/:1.33.0]
    at com.azure.core.util.serializer.JacksonAdapter$SerializerAdapterHolder.<clinit>(JacksonAdapter.java:112) ~[azure-core-1.33.0.jar!/:1.33.0]
    at com.azure.core.util.serializer.JacksonAdapter.createDefaultSerializerAdapter(JacksonAdapter.java:121) ~[azure-core-1.33.0.jar!/:1.33.0]
    at com.azure.storage.blob.implementation.util.ModelHelper.<clinit>(ModelHelper.java:61) ~[azure-storage-blob-12.20.0.jar!/:12.20.0]
    at com.azure.storage.blob.BlobUrlParts.parse(BlobUrlParts.java:371) ~[azure-storage-blob-12.20.0.jar!/:12.20.0]
    at com.azure.storage.blob.BlobServiceClientBuilder.endpoint(BlobServiceClientBuilder.java:171) ~[azure-storage-blob-12.20.0.jar!/:12.20.0]

Answer 1

• 在这里，能够使用blobserviceclient使用以下代码在存储中创建一个容器。

DefaultAzureCredential k = new DefaultAzureCredentialBuilder().build();
BlobServiceClient blobServiceClient = new BlobServiceClientBuilder()  
        .endpoint("https://<storageaccount>.blob.core.windows.net/")  
        .credential(k)  
        .buildClient();

依赖项：

<!-- https://mvnrepository.com/artifact/com.azure/azure-storage-blob -->  
<dependency>  
 <groupId>com.azure</groupId>  
 <artifactId>azure-storage-blob</artifactId>  
 <version>12.20.0</version>  
</dependency>  
  
  
<!-- https://mvnrepository.com/artifact/com.azure/azure-core -->  
<dependency>  
 <groupId>com.azure</groupId>  
 <artifactId>azure-core</artifactId>  
 <version>1.33.0</version>  
</dependency>  
  
  
<!-- https://mvnrepository.com/artifact/com.azure/azure-identity -->  
<dependency>  
 <groupId>com.azure</groupId>  
 <artifactId>azure-identity</artifactId>  
 <version>1.7.0-beta.2</version>  
 <scope>compile</scope>  
</dependency>

• 现在让我们来看看 NoClassDefFoundError 错误，当 JVM 调用一个类并且在运行时无法找到它时，您会收到此错误。

• 也许 ModelHelper 和 MapperBuilder 类/依赖项与其他人不在同一位置。您可以做的是卸载所有内容，然后重新安装所有内容。然后重新编译项目。

Rollbar 在 NoClassDefFoundError 上引用这个 article