我正试图从Hortonworks的"LAB 0:INGEST，ROUTE AND LAND REAL TIME EVENTS WITH APACHE NIFI"教程中构建"流模拟器"。
http://hortonworks.com/hadoop-tutorial/realtime-event-processing-nifi-kafka-storm/#stream-模拟程序lab0
为了让你大致了解这是什么，下面是Hortoworks页面上的描述："流模拟器是一个生成卡车事件数据的轻量级框架。该模拟器使用纽约市卡车路线（kml），该路线通过纬度和经度信息定义驾驶员的道路路径。模拟器使用Akka来简化并发、消息传递和继承。它有两个普通的旧Java对象（POJOS），一个用于Trucks，另一个用于生成事件的Drivers。"
当我试图在构建结束时按照最新Hortonworks Sandbox（HDP 2.4）的指示构建模拟器时，Maven报告了这个错误：
[ERROR] Failed to execute goal on project storm-kafka-0.8-plus:
Could not resolve dependencies for project net.wurstmeister.storm:
storm-kafka-0.8-plus:jar:0.4: Failed to collect dependencies at org.apache.storm:storm-core:jar:
0.9.1-incubating -> clj-time:clj-time:jar:0.4.1:
Failed to read artifact descriptor for clj-time:clj-time:jar:0.4.1:
Could not transfer artifact clj-time:clj-time:pom:0.4.1 from/to clojars (https://clojars.org/repo/):
sun.security.validator.ValidatorException: PKIX path building failed:
sun.security.provider.certpath.SunCertPathBuilderException:
unable to find valid certification path to requested target
更详细的（maven-e）揭示了这些错误细节：
...
Caused by: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
at sun.security.validator.PKIXValidator.doBuild(PKIXValidator.java:385)
at sun.security.validator.PKIXValidator.engineValidate(PKIXValidator.java:292)
at sun.security.validator.Validator.validate(Validator.java:260)
at sun.security.ssl.X509TrustManagerImpl.validate(X509TrustManagerImpl.java:326)
at sun.security.ssl.X509TrustManagerImpl.checkTrusted(X509TrustManagerImpl.java:231)
at sun.security.ssl.X509TrustManagerImpl.checkServerTrusted(X509TrustManagerImpl.java:126)
at sun.security.ssl.ClientHandshaker.serverCertificate(ClientHandshaker.java:1454)
... 74 more
Caused by: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
at sun.security.provider.certpath.SunCertPathBuilder.engineBuild(SunCertPathBuilder.java:196)
at java.security.cert.CertPathBuilder.build(CertPathBuilder.java:268)
at sun.security.validator.PKIXValidator.doBuild(PKIXValidator.java:380)
... 80 more
以下是导致构建错误的pom.xml：
<project xmlns="http://maven.apache.org/POM/4.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0
http://maven.apache.org/maven-v4_0_0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.hortonworks</groupId>
<artifactId>storm-demo</artifactId>
<packaging>pom</packaging>
<version>1.0</version>
<name>Storm Demo Parent Project</name>
<modules>
<module>transport-domain</module>
<module>stream-simulator</module>
<module>storm-streaming</module>
<module>storm-demo-webapp</module>
<module>storm-kafkaplus</module>
<!-- <module>iot-integration-tester</module> -->
</modules>
<build>
<pluginManagement>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<configuration>
<source>1.7</source>
<target>1.7</target>
</configuration>
</plugin>
</plugins>
</pluginManagement>
</build>
<dependencies>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>3.8.1</version>
<scope>test</scope>
</dependency>
</dependencies>
有什么办法解决这个问题吗？请帮忙！
更新：下一个构建错误
在修复证书问题后，我现在有下一个错误：
[INFO] ------------------------------------------------------------------------
[INFO] Building Storm Demo Parent Project 1.0
[INFO] ------------------------------------------------------------------------
Downloading: https://repo.maven.apache.org/maven2/org/apache/maven/plugins/maven-compiler-plugin/maven-metadata.xml
[WARNING] Could not transfer metadata org.apache.maven.plugins:maven-compiler-plugin/maven-metadata.xml from/to central (https://repo.maven.apache.org/maven2): sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
[INFO] ------------------------------------------------------------------------
[INFO] Reactor Summary:
[INFO]
[INFO] transport-domain ................................... SUCCESS [ 2.233 s]
[INFO] stream-simulator ................................... SUCCESS [ 3.694 s]
[INFO] storm-streaming .................................... SUCCESS [01:13 min]
[INFO] storm-demo-webapp .................................. SUCCESS [ 8.642 s]
[INFO] storm-kafka-0.8-plus ............................... SUCCESS [ 17.440 s]
[INFO] Storm Demo Parent Project .......................... FAILURE [ 0.171 s]
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 01:45 min
[INFO] Finished at: 2016-07-26T14:15:46+00:00
[INFO] Final Memory: 119M/826M
[INFO] ------------------------------------------------------------------------
[ERROR] Error resolving version for plugin 'org.apache.maven.plugins:maven-compiler-plugin' from the repositories [local (/root/.m2/repository), central (https://repo.maven.apache.org/maven2)]: Plugin not found in any plugin repository
您的maven插件正试图连接到https远程存储库，即https://clojars.org/repo/
你可以使用这篇文章中的一个解决方案：
在代理后面使用Maven和SSL的问题
我推荐的解决方案是：
（步骤可能因浏览器而异）
- 使用浏览器（使用chrome）转到https://clojars.org/repo/
- 单击锁定图标并选择"详细信息"，然后单击"查看证书"
- 转到"详细信息"选项卡并选择"复制到文件"
- 选择类型"Base 64 X.509（.CER）"并将其保存在某个位置
-
现在打开命令提示符并键入（使用您自己的路径）：
keytool -import -file C:tempmavenCert.cer -keystore C:tempmavenKeystore -
现在您可以使用参数再次运行该命令
-Djavax.net.ssl.trustStore=C:tempmavenKeystore -
在linux下使用绝对路径
-Djavax.net.ssl.trustStore=/tmp/mavenKeystore
现在您可以运行maven构建为：
/root/maven/bin/mvn clean package -Djavax.net.ssl.trustStore=C:tempmavenKeystore