使用java azure客户端的警告消息

Question

使用azure-storage-blob-client，我看到了以下内容：

10:46:38 [main] WARN  JacksonVersion - Could not find version of 'jackson-annotations'. 
10:46:38 [main] ERROR JacksonVersion - Version 'unknown' of package 'jackson-annotations' is not supported (older than earliest supported version - `2.10.0`), please upgrade. 
10:46:38 [main] WARN  JacksonVersion - Could not find version of 'jackson-core'. 
10:46:38 [main] ERROR JacksonVersion - Version 'unknown' of package 'jackson-core' is not supported (older than earliest supported version - `2.10.0`), please upgrade. 
10:46:38 [main] WARN  JacksonVersion - Could not find version of 'jackson-databind'. 
10:46:38 [main] ERROR JacksonVersion - Version 'unknown' of package 'jackson-databind' is not supported (older than earliest supported version - `2.10.0`), please upgrade. 
10:46:38 [main] INFO  JacksonVersion - Package versions: jackson-annotations=unknown, jackson-core=unknown, jackson-databind=unknown, jackson-dataformat-xml=2.12.5, jackson-datatype-jsr310=2.12.5, azure-core=1.21.0 
10:46:38 [main] DEBUG MemberNameConverterImpl - Failed to retrieve MethodHandles used to get naming strategy. Falling back to BeanUtils. 
java.lang.ClassNotFoundException: com.fasterxml.jackson.databind.introspect.AccessorNamingStrategy.Provider
    at java.net.URLClassLoader.findClass(URLClassLoader.java:382)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:418)
    at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:352)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:351)
    at java.lang.Class.forName0(Native Method)
    at java.lang.Class.forName(Class.java:264)
    at com.azure.core.implementation.jackson.MemberNameConverterImpl.<clinit>(MemberNameConverterImpl.java:55)
    at com.azure.core.implementation.jackson.ObjectMapperShim.<init>(ObjectMapperShim.java:139)
    at com.azure.core.implementation.jackson.ObjectMapperShim.createHeaderMapper(ObjectMapperShim.java:127)
    at com.azure.core.util.serializer.JacksonAdapter.<init>(JacksonAdapter.java:75)
    at com.azure.core.util.serializer.JacksonAdapter.<init>(JacksonAdapter.java:53)
    at com.azure.core.util.serializer.JacksonAdapter.createDefaultSerializerAdapter(JacksonAdapter.java:111)
    at com.azure.storage.blob.implementation.util.ModelHelper.<clinit>(ModelHelper.java:53)
    at com.azure.storage.blob.BlobUrlParts.parse(BlobUrlParts.java:371)
    at com.azure.storage.blob.BlobServiceClientBuilder.endpoint(BlobServiceClientBuilder.java:147)
    at com.azure.storage.blob.BlobServiceClientBuilder.connectionString(BlobServiceClientBuilder.java:286)

为什么我会收到这些警告消息？

Answer 1

事实证明，我的一个依赖项是包含jackson组件的"shaded jar“。这个着色过程显然从jar中剥离了某种版本信息，即定义了jackson的哪个版本。它可以被安全地忽略。