Question

Scala版本：2.11.7（必须升级scala verison才能使case clasess接受超过22个参数。） Spark版本：1.6.1 PFB pom.xml

尝试在intellij IDE上设置spark时出现以下错误，

<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>StreamProcess</groupId>
<artifactId>StreamProcess</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>${project.artifactId}</name>
<description>This is a boilerplate maven project to start using Spark in Scala</description>
<inceptionYear>2010</inceptionYear>

<properties>
    <maven.compiler.source>1.6</maven.compiler.source>
    <maven.compiler.target>1.6</maven.compiler.target>
    <encoding>UTF-8</encoding>
    <scala.tools.version>2.10</scala.tools.version>
    <!-- Put the Scala version of the cluster -->
    <scala.version>2.11.7</scala.version>
</properties>

<!-- repository to add org.apache.spark -->
<repositories>
    <repository>
        <id>cloudera-repo-releases</id>
        <url>https://repository.cloudera.com/artifactory/repo/</url>
    </repository>
</repositories>

<build>
    <sourceDirectory>src/main/scala</sourceDirectory>
    <testSourceDirectory>src/test/scala</testSourceDirectory>
    <plugins>
            <!-- any other plugins -->
            <plugin>
                <artifactId>maven-assembly-plugin</artifactId>
                <executions>
                    <execution>
                        <phase>package</phase>
                        <goals>
                            <goal>single</goal>
                        </goals>
                    </execution>
                </executions>
                <configuration>
                    <descriptorRefs>
                        <descriptorRef>jar-with-dependencies</descriptorRef>
                    </descriptorRefs>
                </configuration>
            </plugin>
        <plugin>
            <!-- see http://davidb.github.com/scala-maven-plugin -->
            <groupId>net.alchim31.maven</groupId>
            <artifactId>scala-maven-plugin</artifactId>
            <version>3.2.2</version>
            <executions>
                <execution>
                    <goals>
                        <goal>compile</goal>
                        <goal>testCompile</goal>
                    </goals>
                    <configuration>
                        <args>
                            <!--<arg>-make:transitive</arg>-->
                            <arg>-dependencyfile</arg>
                            <arg>${project.build.directory}/.scala_dependencies</arg>
                        </args>
                    </configuration>
                </execution>
            </executions>
        </plugin>

        <!-- "package" command plugin -->
        <plugin>
            <artifactId>maven-assembly-plugin</artifactId>
            <version>2.4.1</version>
            <configuration>
                <descriptorRefs>
                    <descriptorRef>jar-with-dependencies</descriptorRef>
                </descriptorRefs>
            </configuration>
            <executions>
                <execution>
                    <id>make-assembly</id>
                    <phase>package</phase>
                    <goals>
                        <goal>single</goal>
                    </goals>
                </execution>
            </executions>
        </plugin>
    </plugins>
</build>
<dependencies>
    <dependency>
        <groupId>org.scala-lang</groupId>
        <artifactId>scala-library</artifactId>
        <version>${scala.version}</version>
    </dependency>
    <dependency>
        <groupId>org.mongodb.mongo-hadoop</groupId>
        <artifactId>mongo-hadoop-core</artifactId>
        <version>1.4.2</version>
        <exclusions>
            <exclusion>
                <groupId>javax.servlet</groupId>
                <artifactId>servlet-api</artifactId>
            </exclusion>
        </exclusions>
    </dependency>
    <dependency>
            <groupId>org.mongodb</groupId>
            <artifactId>mongodb-driver</artifactId>
            <version>3.2.2</version>
        <exclusions>
            <exclusion>
                <groupId>javax.servlet</groupId>
                <artifactId>servlet-api</artifactId>
            </exclusion>
        </exclusions>
    </dependency>
    <dependency>
            <groupId>org.mongodb</groupId>
            <artifactId>mongodb-driver</artifactId>
            <version>3.2.2</version>
        <exclusions>
            <exclusion>
                <groupId>javax.servlet</groupId>
                <artifactId>servlet-api</artifactId>
            </exclusion>
        </exclusions>
        </dependency>
    <dependency>
        <groupId>org.apache.spark</groupId>
        <artifactId>spark-streaming_2.10</artifactId>
        <version>1.6.1</version>
    </dependency>
    <dependency>
        <groupId>org.apache.spark</groupId>
        <artifactId>spark-core_2.10</artifactId>
        <version>1.6.1</version>
    </dependency>
    <dependency>
        <groupId>org.apache.spark</groupId>
        <artifactId>spark-sql_2.10</artifactId>
        <version>1.6.1</version>
    </dependency>
    <dependency>
        <groupId>org.apache.hadoop</groupId>
        <artifactId>hadoop-hdfs</artifactId>
        <version>2.6.0</version>
    </dependency>
    <dependency>
        <groupId>org.apache.hadoop</groupId>
        <artifactId>hadoop-auth</artifactId>
        <version>2.6.0</version>
    </dependency>
    <dependency>
        <groupId>org.apache.hadoop</groupId>
        <artifactId>hadoop-common</artifactId>
        <version>2.6.0</version>
    </dependency>
    <dependency>
        <groupId>org.apache.hadoop</groupId>
        <artifactId>hadoop-core</artifactId>
        <version>1.2.1</version>
    </dependency>
</dependencies>

的pom.xml：

 <form id="testForm" onload="ChangeName()">
    <table>
        <tr>
            <td>Username: 
            </td>
            <td>
                <asp:TextBox runat="server" ID="txtUsername" name="txtUsername" required />
            </td>

        </tr>
        <tr>
            <td>Email: 
            </td>
            <td>
                <asp:TextBox runat="server" ID="txtEmail" name="txtEmail" TextMode="Email" ClientIDMode="Static" />
            </td>

        </tr>
    </table>
    <asp:Button runat="server" Text="validate" OnClientClick="ValidateForm()" />
</form>

想知道，为了让事情顺利进行，需要改变什么。

Answer 1

在POM中你有Scala版本2.11.7但是后来在依赖关系中你声明了针对2.10编译的Spark deps：

<artifactId>spark-streaming_2.10</artifactId>
<artifactId>spark-core_2.10</artifactId>
<artifactId>spark-sql_2.10</artifactId>

您必须将其更改为：

<artifactId>spark-streaming_2.11</artifactId>
<artifactId>spark-core_2.11</artifactId>
<artifactId>spark-sql_2.11</artifactId>

Answer 2

对于scala 2.12.0，您应该将以下依赖项添加到POM.xml文件中，就是这样。

<!-- https://mvnrepository.com/artifact/org.scala-lang/scala-library -->
<dependency>
    <groupId>org.scala-lang</groupId>
    <artifactId>scala-library</artifactId>
    <version>2.12.0-M1</version>
</dependency>

Answer 3

我认为您可能需要将 maven 编译器升级到 1.8

<maven.compiler.source>1.8</maven.compiler.source>
<maven.compiler.target>1.8</maven.compiler.target>

线程“main”中的Apache Spark异常java.lang.NoClassDefFoundError：scala / collection / GenTraversableOnce $ class

3 个答案: