StreamingWordCount 示例 Maven 编译时错误

Question

我在运行在云实例上编译 Google 数据流示例时遇到以下错误。我正在尝试使用以下命令运行通过名称 StreamingWordCount 的流示例

mvn compile exec:java -Dexec.mainClass=com.google.cloud.dataflow.examples.complete.StreamingWordCount.java

我做错了什么吗？感谢任何帮助。
谢谢

[INFO] Scanning for projects...
[INFO]                                                                         
[INFO] ------------------------------------------------------------------------
[INFO] Building Google Cloud Dataflow Java Examples - All manual_build
[INFO] ------------------------------------------------------------------------
[INFO] 
[INFO] --- build-helper-maven-plugin:1.10:add-source (add-java8-main-source) @ google-cloud-dataflow-java-examples-all ---
[INFO] Source directory: /home/gaurav_bareja/pipeline/DataflowJavaSDK-examples/src/main/java8 added.
[INFO] 
[INFO] --- build-helper-maven-plugin:1.10:add-test-source (add-java8-test-source) @ google-cloud-dataflow-java-exam
ples-all ---
[INFO] Test Source directory: /home/gaurav_bareja/pipeline/DataflowJavaSDK-examples/src/test/java8 added.
[INFO] 
[INFO] --- maven-resources-plugin:2.6:resources (default-resources) @ google-cloud-dataflow-java-examples-all ---
[INFO] Using 'UTF-8' encoding to copy filtered resources.
[INFO] skip non existing resourceDirectory /home/gaurav_bareja/pipeline/DataflowJavaSDK-examples/src/main/resources
[INFO] 
[INFO] --- maven-compiler-plugin:3.1:compile (default-compile) @ google-cloud-dataflow-java-examples-all ---
[INFO] Nothing to compile - all classes are up to date
[INFO] 
[INFO] --- maven-compiler-plugin:3.1:compile (java8-compile) @ google-cloud-dataflow-java-examples-all ---
[INFO] Nothing to compile - all classes are up to date
[INFO] 
[INFO] >>> exec-maven-plugin:1.1:java (default-cli) > validate @ google-cloud-dataflow-java-examples-all >>>
[INFO] 
[INFO] <<< exec-maven-plugin:1.1:java (default-cli) < validate @ google-cloud-dataflow-java-examples-all <<<
[INFO] 
[INFO] --- exec-maven-plugin:1.1:java (default-cli) @ google-cloud-dataflow-java-examples-all ---
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 3.496 s
[INFO] Finished at: 2016-03-19T13:23:56+00:00
[INFO] Final Memory: 15M/56M
[INFO] ------------------------------------------------------------------------
[ERROR] Failed to execute goal org.codehaus.mojo:exec-maven-plugin:1.1:java (default-cli) on project google-cloud-d
ataflow-java-examples-all: An exception occured while executing the Java class. com.google.cloud.dataflow.examples.
complete.StreamingWordCount.java -> [Help 1]
[ERROR] 
[ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch.
[ERROR] Re-run Maven using the -X switch to enable full debug logging.
[ERROR] 
[ERROR] For more information about the errors and possible solutions, please read the following articles:
[ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/MojoExecution

异常

Answer 1

您似乎在尝试运行 StreamingWordCount Java 的 Google Cloud Dataflow SDK 附带的示例。该名称下的示例不存在 - 因此，您看到的是异常。

您可能想要运行 WindowedWordCount，一个示例显示如何运行在流模式下的无界 PCollections 或批处理模式下的有界 PCollections 上使用相同的管道.

请按照说明进行操作here。

StreamingWordCount 示例 Maven 编译时错误

StreamingWordCount example maven compile time errors

streaming

pipeline

maven

google-bigquery

google-cloud-dataflow