Question

我想通过TiSpark将Spark集群连接到TIDB，但是运行Spark应用程序时出现问题，发生错误：

java.io.InvalidClassException：com.pingcap.tikv.region.TiRegion;本地类不兼容：流classdesc serialVersionUID = -3091715739322916126，本地类serialVersionUID = -3556238418089320368

我正在按照https://pingcap.com/docs/v3.0/how-to/get-started/deploy-tidb-from-binary/的指南设置TIDB集群

之后，我按照https://pingcap.com/docs/v3.0/reference/tispark/上的指南下载tispark-core-2.2.0-SNAPSHOT-jar-with-dependencies.jar并将其复制到我的Spark的jars文件夹中。

我还配置： spark.tispark.pd。地址127.0.0.1:2379 spark.sql.extensions org.apache.spark.sql.TiExtensions

这是我的pom文件：

<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.vng</groupId>
  <artifactId>testlan102</artifactId>
  <version>1.0-SNAPSHOT</version>
  <inceptionYear>2019</inceptionYear>
  <properties>
    <scala.version>2.11.12</scala.version>
    <spark.version>2.4.3</spark.version>
  </properties>

  <repositories>
    <repository>
      <id>scala-tools.org</id>
      <name>Scala-Tools Maven2 Repository</name>
      <url>http://scala-tools.org/repo-releases</url>
    </repository>
  </repositories>

  <pluginRepositories>
    <pluginRepository>
      <id>scala-tools.org</id>
      <name>Scala-Tools Maven2 Repository</name>
      <url>http://scala-tools.org/repo-releases</url>
    </pluginRepository>
  </pluginRepositories>

  <dependencies>
    <dependency>
      <groupId>org.scala-lang</groupId>
      <artifactId>scala-library</artifactId>
      <version>${scala.version}</version>
    </dependency>
    <dependency>
      <groupId>org.apache.spark</groupId>
      <artifactId>spark-core_2.11</artifactId>
      <version>2.4.3</version>
    </dependency>
    <dependency>
      <groupId>org.apache.spark</groupId>
      <artifactId>spark-sql_2.11</artifactId>
      <version>2.4.3</version>
    </dependency>
    <dependency>
      <groupId>org.scala-lang.modules</groupId>
      <artifactId>scala-xml_2.11</artifactId>
      <version>1.2.0</version>
    </dependency>

    <dependency>
      <groupId>org.apache.spark</groupId>
      <artifactId>spark-streaming_2.11</artifactId>
      <version>2.4.3</version>
      <scope>provided</scope>
    </dependency>
    <dependency>
      <groupId>org.apache.kafka</groupId>
      <artifactId>kafka-streams</artifactId>
      <version>2.3.0</version>
    </dependency>
    <dependency>
      <groupId>com.pingcap.tispark</groupId>
      <artifactId>tispark-core</artifactId>
      <version>2.1.1-spark_2.4</version>
    </dependency>
    <dependency>
      <groupId>mysql</groupId>
      <artifactId>mysql-connector-java</artifactId>
      <version>5.1.37</version>
    </dependency>

    <dependency>
      <groupId>org.scala-lang</groupId>
      <artifactId>scala-library</artifactId>
      <version>2.11.12</version>
    </dependency>
  </dependencies>

  <build>
    <sourceDirectory>src/main/scala</sourceDirectory>
    <plugins>
      <plugin>
        <groupId>org.scala-tools</groupId>
        <artifactId>maven-scala-plugin</artifactId>
        <executions>
          <execution>
            <goals>
              <goal>compile</goal>
            </goals>
          </execution>
        </executions>
        <configuration>
          <scalaVersion>${scala.version}</scalaVersion>
          <args>
            <arg>-target:jvm-1.5</arg>
          </args>
        </configuration>
      </plugin>
      <plugin>
        <groupId>org.apache.maven.plugins</groupId>
        <artifactId>maven-eclipse-plugin</artifactId>
        <configuration>
          <downloadSources>true</downloadSources>
          <buildcommands>
            <buildcommand>ch.epfl.lamp.sdt.core.scalabuilder</buildcommand>
          </buildcommands>
          <additionalProjectnatures>
            <projectnature>ch.epfl.lamp.sdt.core.scalanature</projectnature>
          </additionalProjectnatures>
          <classpathContainers>
            <classpathContainer>org.eclipse.jdt.launching.JRE_CONTAINER</classpathContainer>
            <classpathContainer>ch.epfl.lamp.sdt.launching.SCALA_CONTAINER</classpathContainer>
          </classpathContainers>
        </configuration>
      </plugin>
    </plugins>
  </build>
  <reporting>
    <plugins>
      <plugin>
        <groupId>org.scala-tools</groupId>
        <artifactId>maven-scala-plugin</artifactId>
        <configuration>
          <scalaVersion>${scala.version}</scalaVersion>
        </configuration>
      </plugin>
      <plugin>
        <groupId>org.apache.maven.plugins</groupId>
        <artifactId>maven-jar-plugin</artifactId>
        <configuration>
          <archive>
            <manifest>
              <addClasspath>true</addClasspath>
              <mainClass>fully.qualified.MainClass</mainClass>
            </manifest>
          </archive>
        </configuration>
      </plugin>
      <plugin>
        <artifactId>maven-assembly-plugin</artifactId>
        <configuration>
          <descriptorRefs>
            <descriptorRef>jar-with-dependencies</descriptorRef>
          </descriptorRefs>
        </configuration>
      </plugin>
    </plugins>
  </reporting>
</project>

我的Spark会话是：

val _spark = SparkSession.builder()
      .master("spark://127.0.0.1:7077")
      .config("spark.tispark.pd.addresses", "127.0.0.1:2379")
      .config("spark.sql.extensions","org.apache.spark.sql.TiExtensions")
      .appName("SparkApp")
      .getOrCreate()

当我对数据库调用简单查询时：

_spark.sql("use locdb")
val df = _spark.sql("select * from bang")
df.show()

我收到一个错误： java.io.InvalidClassException：com.pingcap.tikv.region.TiRegion;本地类不兼容：流classdesc serialVersionUID = -3091715739322916126，本地类serialVersionUID = -3556238418089320368

我的完整日志在这里： https://gist.github.com/lploc94/bb6bf9db14c030ee123630f6362f6160

我认为原因是我在maven pom文件中使用TiSpark 2.1.1-2.4，但是我下载并复制到jars文件夹中的Tispark jar文件是2.2.0。但我看不到任何其他版本的TiSpark，例如tispark-core-2.1.1-SNAPSHOT-jar-with-dependencies.jar

Answer 1

我是tispark的开发人员。是的，您有根据的猜测是正确的:)。运行期间有两种不同版本的tispark jars引起问题。 2.2版（在您的集群环境中）尚未正式发布到Maven回购工件。

由于您已经在集群中部署了tispark jar，因此只需删除pom中的tispark依赖项即可。在大多数情况下，除非您使用旧版本（<2.0），并且您仍然可以直接查询tidb，则不需要tispark的任何特殊api。

或者您可以删除集群环境中的所有jar，然后依靠pom中的tispark（如果是，请打包依赖项）。

java.io.InvalidClassException：com.pingcap.tikv.region.TiRegion-本地类不兼容

1 个答案: