Question

使用Eclipse Mars。我已经通过安装软件从help.Iow添加了aws java sdk 1.11.123。当我运行Tomcat Server 7时，我收到此错误：

May 02, 2017 11:57:32 PM org.apache.catalina.core.StandardWrapperValve invoke SEVERE: Servlet.service() for servlet [PdsServlet] in context with path [/PdsAWS] threw exception [java.lang.NoClassDefFoundError: Could not initialize class com.amazonaws.partitions.PartitionsLoader] with root cause java.lang.NoClassDefFoundError: Could not initialize class com.amazonaws.partitions.PartitionsLoader

我也得到了

java.lang.NoSuchFieldError: ALLOW_FINAL_FIELDS_AS_MUTATORS

但是当我检查库时，我可以看到PartitionsLoader。如何解决这个问题？

更多看似相关的错误：

May 03, 2017 9:39:04 AM com.sun.jersey.spi.container.ContainerResponse mapMappableContainerException
SEVERE: The exception contained within MappableContainerException could not be mapped to a response, re-throwing to the HTTP container
java.lang.NoClassDefFoundError: Could not initialize class com.amazonaws.partitions.PartitionsLoader
	at com.amazonaws.regions.RegionMetadataFactory.create(RegionMetadataFactory.java:30)
	at com.amazonaws.regions.RegionUtils.initialize(RegionUtils.java:64)
	at com.amazonaws.regions.RegionUtils.getRegionMetadata(RegionUtils.java:52)
	at com.amazonaws.regions.RegionUtils.getRegion(RegionUtils.java:105)
	at com.amazonaws.services.s3.AmazonS3Client.createSigner(AmazonS3Client.java:3428)
	at com.amazonaws.services.s3.AmazonS3Client.invoke(AmazonS3Client.java:4156)
	at com.amazonaws.services.s3.AmazonS3Client.invoke(AmazonS3Client.java:4116)
	at com.amazonaws.services.s3.AmazonS3Client.putObject(AmazonS3Client.java:1700)
	at com.amazonaws.services.s3.AmazonS3Client.putObject(AmazonS3Client.java:1563)
	at com.tradingtechnologies.pdsawssql.aws.s3.S3HealthCheck.put(S3HealthCheck.java:83)
	at com.tradingtechnologies.pdsawssql.aws.s3.S3HealthCheck.put(S3HealthCheck.java:56)
	at com.tradingtechnologies.pdsawssql.aws.s3.S3HealthCheck.execute(S3HealthCheck.java:116)
	at com.tradingtechnologies.pdsawssql.sql.ext.HealthCheck.execute(HealthCheck.java:54)
	at com.tradingtechnologies.pdsservlet.HealthServlet.doGet(HealthServlet.java:31)
	at sun.reflect.GeneratedMethodAccessor35.invoke(Unknown Source)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:606)
	at com.sun.jersey.spi.container.JavaMethodInvokerFactory$1.invoke(JavaMethodInvokerFactory.java:60)
	at com.sun.jersey.server.impl.model.method.dispatch.AbstractResourceMethodDispatchProvider$ResponseOutInvoker._dispatch(AbstractResourceMethodDispatchProvider.java:205)
	at com.sun.jersey.server.impl.model.method.dispatch.ResourceJavaMethodDispatcher.dispatch(ResourceJavaMethodDispatcher.java:75)
	at com.sun.jersey.server.impl.uri.rules.HttpMethodRule.accept(HttpMethodRule.java:302)
	at com.sun.jersey.server.impl.uri.rules.ResourceClassRule.accept(ResourceClassRule.java:108)
	at com.sun.jersey.server.impl.uri.rules.RightHandPathRule.accept(RightHandPathRule.java:147)
	at com.sun.jersey.server.impl.uri.rules.RootResourceClassesRule.accept(RootResourceClassesRule.java:84)
	at com.sun.jersey.server.impl.application.WebApplicationImpl._handleRequest(WebApplicationImpl.java:1511)
	at com.sun.jersey.server.impl.application.WebApplicationImpl._handleRequest(WebApplicationImpl.java:1442)
	at com.sun.jersey.server.impl.application.WebApplicationImpl.handleRequest(WebApplicationImpl.java:1391)
	at com.sun.jersey.server.impl.application.WebApplicationImpl.handleRequest(WebApplicationImpl.java:1381)
	at com.sun.jersey.spi.container.servlet.WebComponent.service(WebComponent.java:416)
	at com.sun.jersey.spi.container.servlet.ServletContainer.service(ServletContainer.java:538)
	at com.sun.jersey.spi.container.servlet.ServletContainer.service(ServletContainer.java:716)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:731)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:303)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
	at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
	at com.tradingtechnologies.pdsservercommon.filters.HttpHeaderFilter.doFilter(HttpHeaderFilter.java:24)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:218)
	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:110)
	at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:506)
	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:169)
	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:103)
	at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:962)
	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:116)
	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:445)
	at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1115)
	at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:637)
	at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:316)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
	at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
	at java.lang.Thread.run(Thread.java:745)

Answer 1

java.lang.NoSuchFieldError：ALLOW_FINAL_FIELDS_AS_MUTATORS

这听起来好像是从某个地方拿起旧版杰克逊。 PartitionsLoader在初始化静态成员字段时引用MapperFeature.ALLOW_FINAL_FIELDS_AS_MUTATORS。如果在运行时选择的MapperFeature版本没有此字段，则生成的异常将导致PartitionsLoader的类初始化过程失败。然后，引用该类的后续尝试将抛出您正在看到的异常。

在2.2版中添加了ALLOW_FINAL_FIELDS_AS_MUTATORS。你选择哪个版本？

Answer 2

Tomcat有自己的依赖文件。可以在Eclipse中配置构建路径，而不是将依赖项添加到Tomcat以进行构建/部署，这可能导致Java抛出该错误。

在Eclipse中将项目重新创建为动态Web项目（如果您不熟悉，请查看有关如何执行此操作的文档）。然后在自动生成的“WEB-INF / lib”文件夹中包含任何第三方jar或lib，以及从Eclipse中的源代码运行所需的构建路径（也就是您现在的方式）。然后，当您准备好部署时，导出到war文件，并且“WEB-INF / lib”文件夹中的所有必需的库将对您的编译源可见。

Answer 3

好的，我面临同样的依赖性地狱挑战并花了很长时间进行清理。以下是我需要同步的依赖项集 -

经验法则：始终使用相同的aws sdk依赖版本（ core / s3 / ec2 等）
在项目中使其他依赖（由aws使用）保持一致。
这包括以下内容
- commons-http与AWS使用的http-client冲突
- 删除 commons-http ，使用一致的 http-client和http-core 版本
- 冲突 fasterxml.jackson 库。使用一致的verison AWS。
  - 这包括约4个罐子（ jackson-databind，core，annotations，cbor ）

Answer 4

我过去有同样的问题在我的情况下，我像上面一样设置 pom.xml 并解决问题

设置 aws-java-sdk-bom

 <repositories>
 <repository>
     <id>mvn2</id>
     <url>http://repo1.maven.org/maven2/</url>
     <releases>
         <enabled>true</enabled>
     </releases>
     <snapshots>
         <enabled>true</enabled>
     </snapshots>
 </repository>
 <repository>
     <id>egovframe</id>
     <url>http://www.egovframe.go.kr/maven/</url>
     <releases>
         <enabled>true</enabled>
     </releases>
     <snapshots>
         <enabled>false</enabled>
     </snapshots>
 </repository>
 <repository>
     <id>egovframe2</id>
     <url>http://maven.egovframe.kr:8080/maven/</url>
     <releases>
         <enabled>true</enabled>
     </releases>
     <snapshots>
         <enabled>false</enabled>
     </snapshots>
 </repository>

<块引用>

必须设置隔离dependencyManagement字段并且是第一个字段

**<dependencyManagement>
  <dependencies>
    <dependency>
      <groupId>com.amazonaws</groupId>
      <artifactId>aws-java-sdk-bom</artifactId>
      <version>1.11.837</version>
    </dependency>
</dependencies>
</dependencyManagement>**
<dependencies>
    <dependency>
        <groupId>egovframework.rte</groupId>
        <artifactId>egovframework.rte.ptl.mvc</artifactId>
        <version>${egovframework.rte.version}</version>
        <exclusions>

aws-sdk-s3，核心，kms

<块引用>

并在字段中设置 s3、core、kms 配置

<dependencies>
    <dependency>
        <groupId>egovframework.rte</groupId>
        <artifactId>egovframework.rte.ptl.mvc</artifactId>
        <version>${egovframework.rte.version}</version>
        <exclusions>
            <exclusion>

.......

<dependency>
        <groupId>commons-fileupload</groupId>
        <artifactId>commons-fileupload</artifactId>
        <version>1.2.1</version>
    </dependency>
    <dependency>
        <groupId>org.apache.commons</groupId>
        <artifactId>commons-io</artifactId>
        <version>1.3.2</version>
    </dependency>

    **<dependency>
        <groupId>com.amazonaws</groupId>
        <artifactId>aws-java-sdk-core</artifactId>
        <version>1.11.837</version>
    </dependency>
    <dependency>
        <groupId>com.amazonaws</groupId>
        <artifactId>aws-java-sdk-s3</artifactId>
        <version>1.11.837</version>
    </dependency>
    <dependency>
        <groupId>com.amazonaws</groupId>
        <artifactId>aws-java-sdk-kms</artifactId>
            <version>1.11.837</version>
    </dependency>**
</dependencies>

无法初始化类com.amazonaws.partitions.PartitionsLoader

4 个答案: