运行使用 Spark 和 Maven 的项目

Question

我正在尝试运行我的 class java 读取 GML 文件，我为此使用了 Tinkerpop 和 GMLReader，问题是当我尝试运行它与 spark 它给了我一个例外
我写了一个简单的测试代码：

 public static void main(String[] args) throws IOException {
    TinkerGraph graphs = new TinkerGraph();
    String in = "/home/salma/Desktop/celegansneural.gml";
    GMLReader.inputGraph(graphs, in);
    System.out.println(graphs);
 }

我用来运行 class 的命令：

root@salma-SATELLITE-C855-1EQ:/usr/local/spark# ./bin/spark-submit --class graph_example.WordCount --master local[2] ~/workspace/graph_example/target/graph_example-0.0.1-SNAPSHOT.jar

错误：

Exception in thread "main" java.lang.NoClassDefFoundError:
 com/tinkerpop/blueprints/impls/tg/TinkerGraph
        at graph_example.WordCount.main(WordCount.java:51)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:498)
        at org.apache.spark.deploy.SparkSubmit$.org$apache$spark$deploy$SparkSubmit$$runMain(SparkSubmit.scala:569)
        at org.apache.spark.deploy.SparkSubmit$.doRunMain(SparkSubmit.scala:166)
        at org.apache.spark.deploy.SparkSubmit$.submit(SparkSubmit.scala:189)
        at org.apache.spark.deploy.SparkSubmit$.main(SparkSubmit.scala:110)
        at org.apache.spark.deploy.SparkSubmit.main(SparkSubmit.scala)
     Caused by: java.lang.ClassNotFoundException: com.tinkerpop.blueprints.impls.tg.TinkerGraph
        at java.net.URLClassLoader.findClass(URLClassLoader.java:381)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
        ... 10 more
     Using Spark's default log4j profile: org/apache/spark/log4j-defaults.properties

Answer 1

您必须提供包含 TinkerGraph 实现的依赖项。如果我没记错的话，你需要提供this jar

然后你运行 spark-submit 像往常一样但是 --jars /some/location/blueprints-core-2.6.0.jar

在official documentation中有说明：

When using spark-submit, the application jar along with any jars included with the --jars option will be automatically transferred to the cluster.

运行使用 Spark 和 Maven 的项目

Run project with Spark and maven

java

maven

apache-spark

tinkerpop-blueprint

运行 使用 Spark 和 Maven 的项目

Run project with Spark and maven

java

maven

apache-spark

tinkerpop-blueprint

运行使用 Spark 和 Maven 的项目