java.lang.NoClassDefFoundError: org/apache/http/conn/SchemePortResolver 与 AmazonHttpClient
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java.lang.NoClassDefFoundError: org/apache/http/conn/SchemePortResolver with AmazonHttpClient
提问by user3277841
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I am running into this error in my project when I updated aws library to the latest 1.11.3.
当我将 aws 库更新到最新的 1.11.3 时，我在我的项目中遇到了这个错误。
Caused by:
造成的：
java.lang.NoClassDefFoundError: org/apache/http/conn/SchemePortResolver
at com.amazonaws.http.apache.client.impl.ApacheHttpClientFactory.<init>(ApacheHttpClientFactory.java:40)
at com.amazonaws.http.AmazonHttpClient.<clinit>(AmazonHttpClient.java:97)
at com.amazonaws.AmazonWebServiceClient.<init>(AmazonWebServiceClient.java:145)
at com.amazonaws.services.s3.AmazonS3Client.<init>(AmazonS3Client.java:393)
at com.amazonaws.services.s3.AmazonS3Client.<init>(AmazonS3Client.java:373)
at com.amazonaws.services.s3.AmazonS3Client.<init>(AmazonS3Client.java:355)
at com.amazonaws.services.s3.AmazonS3Client.<init>(AmazonS3Client.java:339)
in my pom.xml
在我的 pom.xml
<dependency>
<groupId>com.amazonaws</groupId>
<artifactId>aws-java-sdk-core</artifactId>
<version>1.11.3</version>
</dependency>
<dependency>
<groupId>com.amazonaws</groupId>
<artifactId>aws-java-sdk-s3</artifactId>
<version>1.11.3</version>
</dependency>
<dependency>
<groupId>com.amazonaws</groupId>
<artifactId>aws-java-sdk-kms</artifactId>
<version>1.11.3</version>
</dependency>
<dependency>
<groupId>org.bouncycastle</groupId>
<artifactId>bcprov-ext-jdk15on</artifactId>
<version>1.54</version>
</dependency>
<dependency>
<groupId>com.amazonaws</groupId>
<artifactId>aws-encryption-sdk-java</artifactId>
<version>0.0.1-SNAPSHOT</version>
</dependency>
Anyone know what I did wrong?
有谁知道我做错了什么？
thanks
谢谢
回答by eidolon1138
I had a similar issue with my grails application. In my case the ClassNotFoundException was being thrown from a deploy script. For me the reason SchemePortResolver wasn't being resolved implicitly was because it wasn't required at compile time, it was needed at runtime. Here's what I added to my BuildConfig.groovy to fix it:
我的 grails 应用程序也有类似的问题。在我的情况下， ClassNotFoundException 是从部署脚本中抛出的。对我来说，SchemePortResolver 没有被隐式解析的原因是因为它在编译时不需要，在运行时需要。这是我添加到 BuildConfig.groovy 中以修复它的内容：
runtime 'org.apache.httpcomponents:httpclient:4.5.2' //Required by BeanstalkDeploy.groovy at runtime
Since the OP's question was for Maven, here's the equivalent include:
由于 OP 的问题是针对 Maven 的，因此等效的包括：
<dependency>
<groupId>org.apache.httpcomponents</groupId>
<artifactId>httpclient</artifactId>
<version>4.5.2</version>
<scope>runtime</scope>
</dependency>
回答by user1902945
If you add,
如果添加，
<dependency>
<groupId>org.apache.httpcomponents</groupId>
<artifactId>httpclient</artifactId>
<version>4.5.2</version>
</dependency>
,it should work ok as it contains the missing class definitions.
，它应该可以正常工作，因为它包含缺少的类定义。
回答by PaoloC
A common cause would be a Maven dependency conflict. In the example below (pom.xmlas viewed in Eclipse's Dependency Hierarchytab), the POM explicitly includes v4.1 of httpclient, which forces Maven to omit the v4.5.5 that aws-java-sdk-core requires (and thus, causes the similar error java.lang.NoClassDefFoundError: org/apache/http/conn/DnsResolver at com.amazonaws.http.apache.client.impl.ApacheHttpClientFactory...):
一个常见的原因是 Maven 依赖冲突。在下面的示例中（pom.xml在 Eclipse 的Dependency Hierarchy选项卡中查看），POM 明确包含 v4.1 of httpclient，这强制 Maven 省略 aws-java-sdk-core 所需的 v4.5.5（因此，导致类似的错误java .lang.NoClassDefFoundError: org/apache/http/conn/DnsResolver at com.amazonaws.http.apache.client.impl.ApacheHttpClientFactory...):
回答by Arun Prajapati
In my case I delete the .meta file in eclipse workplace then import the project again thereafter it work like a charm. Could not know where the problem exactly. Before delete .meta I add all files from aws-java-sdk-1.11.606\third-party\lib
在我的情况下，我删除了 eclipse 工作区中的 .meta 文件，然后再次导入该项目，它就像一个魅力。不知道问题究竟出在哪里。在删除 .meta 之前，我添加了 aws-java-sdk-1.11.606\third-party\lib 中的所有文件
