diff --git a/core-test/pom.xml.versionsBackup b/core-test/pom.xml.versionsBackup
deleted file mode 100644
index e51b76439..000000000
--- a/core-test/pom.xml.versionsBackup
+++ /dev/null
@@ -1,394 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<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/xsd/maven-4.0.0.xsd">
-    <modelVersion>4.0.0</modelVersion>
-    <parent>
-        <groupId>com.pingcap.tispark</groupId>
-        <artifactId>tispark-parent</artifactId>
-        <version>3.1.3</version>
-        <relativePath>../pom.xml</relativePath>
-    </parent>
-
-    <artifactId>tispark-core-test</artifactId>
-    <packaging>jar</packaging>
-    <name>TiSpark Project Core Test</name>
-    <url>http://github.copm/pingcap/tispark</url>
-
-    <dependencies>
-        <dependency>
-            <groupId>com.pingcap.tispark</groupId>
-            <artifactId>tispark-core-internal</artifactId>
-            <version>${project.parent.version}</version>
-            <exclusions>
-                <exclusion>
-                    <groupId>org.apache.spark</groupId>
-                    <artifactId>spark-core_${scala.binary.version}</artifactId>
-                </exclusion>
-                <exclusion>
-                    <groupId>org.apache.spark</groupId>
-                    <artifactId>spark-catalyst_${scala.binary.version}</artifactId>
-                </exclusion>
-                <exclusion>
-                    <groupId>org.apache.spark</groupId>
-                    <artifactId>spark-sql_${scala.binary.version}</artifactId>
-                </exclusion>
-                <exclusion>
-                    <groupId>org.apache.spark</groupId>
-                    <artifactId>spark-hive_${scala.binary.version}</artifactId>
-                </exclusion>
-                <exclusion>
-                    <groupId>org.apache.spark</groupId>
-                    <artifactId>spark-hive-thriftserver_${scala.binary.version}</artifactId>
-                </exclusion>
-                <exclusion>
-                    <groupId>org.apache.spark</groupId>
-                    <artifactId>spark-unsafe_${scala.binary.version}</artifactId>
-                </exclusion>
-            </exclusions>
-        </dependency>
-        <dependency>
-            <groupId>com.pingcap.tikv</groupId>
-            <artifactId>tikv-client</artifactId>
-            <version>${project.parent.version}</version>
-        </dependency>
-        <dependency>
-            <groupId>com.pingcap.tispark</groupId>
-            <artifactId>db-random-test</artifactId>
-            <version>${project.parent.version}</version>
-            <scope>test</scope>
-        </dependency>
-        <dependency>
-            <groupId>org.scalaj</groupId>
-            <artifactId>scalaj-http_${scala.binary.version}</artifactId>
-            <version>${scalaj.version}</version>
-            <exclusions>
-                <exclusion>
-                    <groupId>org.scala-lang</groupId>
-                    <artifactId>scala-library</artifactId>
-                </exclusion>
-            </exclusions>
-        </dependency>
-        <dependency>
-            <groupId>org.apache.logging.log4j</groupId>
-            <artifactId>log4j-api</artifactId>
-            <version>2.17.2</version>
-        </dependency>
-        <dependency>
-            <groupId>org.apache.logging.log4j</groupId>
-            <artifactId>log4j-core</artifactId>
-            <version>2.17.2</version>
-        </dependency>
-        <dependency>
-            <groupId>org.apache.spark</groupId>
-            <artifactId>spark-core_${scala.binary.version}</artifactId>
-            <version>${spark.version.test}</version>
-            <exclusions>
-                <exclusion>
-                    <groupId>org.apache.logging.log4j</groupId>
-                    <artifactId>log4j-api</artifactId>
-                </exclusion>
-                <exclusion>
-                    <groupId>org.apache.logging.log4j</groupId>
-                    <artifactId>log4j-core</artifactId>
-                </exclusion>
-            </exclusions>
-        </dependency>
-        <dependency>
-            <groupId>org.apache.spark</groupId>
-            <artifactId>spark-catalyst_${scala.binary.version}</artifactId>
-            <version>${spark.version.test}</version>
-        </dependency>
-        <dependency>
-            <groupId>org.apache.spark</groupId>
-            <artifactId>spark-sql_${scala.binary.version}</artifactId>
-            <version>${spark.version.test}</version>
-        </dependency>
-        <dependency>
-            <groupId>org.apache.spark</groupId>
-            <artifactId>spark-hive_${scala.binary.version}</artifactId>
-            <version>${spark.version.test}</version>
-            <exclusions>
-                <exclusion>
-                    <groupId>org.apache.hadoop</groupId>
-                    <artifactId>hadoop-client</artifactId>
-                </exclusion>
-            </exclusions>
-        </dependency>
-        <dependency>
-            <groupId>org.apache.spark</groupId>
-            <artifactId>spark-hive-thriftserver_${scala.binary.version}</artifactId>
-            <version>${spark.version.test}</version>
-        </dependency>
-        <dependency>
-            <groupId>org.apache.spark</groupId>
-            <artifactId>spark-unsafe_${scala.binary.version}</artifactId>
-            <version>${spark.version.test}</version>
-        </dependency>
-        <dependency>
-            <groupId>org.apache.hadoop</groupId>
-            <artifactId>hadoop-client</artifactId>
-            <version>2.7.2</version>
-            <exclusions>
-                <exclusion>
-                    <groupId>org.slf4j</groupId>
-                    <artifactId>slf4j-log4j12</artifactId>
-                </exclusion>
-            </exclusions>
-        </dependency>
-        <dependency>
-            <groupId>com.google.guava</groupId>
-            <artifactId>guava</artifactId>
-            <version>29.0-android</version>
-        </dependency>
-        <!-- For tests -->
-        <dependency>
-            <groupId>org.scalatest</groupId>
-            <artifactId>scalatest_${scala.binary.version}</artifactId>
-            <version>${scalatest.version}</version>
-            <scope>test</scope>
-        </dependency>
-        <dependency>
-            <groupId>mysql</groupId>
-            <artifactId>mysql-connector-java</artifactId>
-            <version>${mysql.connector.version}</version>
-            <scope>test</scope>
-        </dependency>
-    </dependencies>
-
-    <build>
-        <resources>
-            <resource>
-                <directory>src/main/resources</directory>
-                <filtering>true</filtering>
-            </resource>
-        </resources>
-        <extensions>
-            <extension>
-                <groupId>kr.motd.maven</groupId>
-                <artifactId>os-maven-plugin</artifactId>
-                <version>1.4.1.Final</version>
-            </extension>
-        </extensions>
-        <plugins>
-            <plugin>
-                <groupId>net.alchim31.maven</groupId>
-                <artifactId>scala-maven-plugin</artifactId>
-                <version>4.3.0</version>
-                <executions>
-                    <execution>
-                        <id>compile-scala</id>
-                        <phase>compile</phase>
-                        <goals>
-                            <goal>add-source</goal>
-                            <goal>compile</goal>
-                        </goals>
-                    </execution>
-                    <execution>
-                        <id>test-compile-scala</id>
-                        <phase>test-compile</phase>
-                        <goals>
-                            <goal>add-source</goal>
-                            <goal>testCompile</goal>
-                        </goals>
-                    </execution>
-                    <execution>
-                        <id>attach-javadocs</id>
-                        <goals>
-                            <goal>doc-jar</goal>
-                        </goals>
-                    </execution>
-                </executions>
-                <configuration>
-                    <scalaVersion>${scala.version}</scalaVersion>
-                </configuration>
-            </plugin>
-            <!-- Resource Plug-in -->
-            <plugin>
-                <groupId>org.apache.maven.plugins</groupId>
-                <artifactId>maven-resources-plugin</artifactId>
-                <version>2.5</version>
-                <configuration>
-                    <encoding>UTF-8</encoding>
-                </configuration>
-            </plugin>
-            <!-- Compiler Plug-in -->
-            <plugin>
-                <groupId>org.codehaus.mojo</groupId>
-                <artifactId>exec-maven-plugin</artifactId>
-                <version>1.6.0</version>
-                <configuration>
-                    <skip>${skipFetchTestData}</skip>
-                </configuration>
-                <executions>
-                    <execution>
-                        <id>version imprint</id>
-                        <configuration>
-                            <executable>${basedir}/scripts/version.sh</executable>
-                        </configuration>
-                        <phase>validate</phase>
-                        <goals>
-                            <goal>exec</goal>
-                        </goals>
-                    </execution>
-                    <execution>
-                        <id>test data fetch</id>
-                        <phase>validate</phase>
-                        <configuration>
-                            <executable>${basedir}/scripts/fetch-test-data.sh</executable>
-                        </configuration>
-                        <goals>
-                            <goal>exec</goal>
-                        </goals>
-                    </execution>
-                </executions>
-            </plugin>
-            <plugin>
-                <groupId>org.apache.maven.plugins</groupId>
-                <artifactId>maven-compiler-plugin</artifactId>
-                <version>3.8.1</version>
-                <configuration>
-                    <source>1.8</source>
-                    <target>1.8</target>
-                    <encoding>UTF-8</encoding>
-                    <showWarnings>true</showWarnings>
-                    <showDeprecation>true</showDeprecation>
-                </configuration>
-            </plugin>
-            <!-- Jar Plug-in -->
-            <plugin>
-                <groupId>org.apache.maven.plugins</groupId>
-                <artifactId>maven-jar-plugin</artifactId>
-                <version>2.3.2</version>
-                <configuration>
-                    <archive>
-                        <addMavenDescriptor>false</addMavenDescriptor>
-                    </archive>
-                </configuration>
-            </plugin>
-            <!-- Source Plug-in -->
-            <plugin>
-                <groupId>org.apache.maven.plugins</groupId>
-                <artifactId>maven-source-plugin</artifactId>
-                <version>3.0.1</version>
-                <executions>
-                    <execution>
-                        <id>attach-sources</id>
-                        <goals>
-                            <goal>jar-no-fork</goal>
-                        </goals>
-                    </execution>
-                </executions>
-            </plugin>
-            <!-- Clean Plug-in -->
-            <plugin>
-                <groupId>org.apache.maven.plugins</groupId>
-                <artifactId>maven-clean-plugin</artifactId>
-                <version>2.4.1</version>
-            </plugin>
-            <!-- Javadoc Plug-in -->
-            <plugin>
-                <groupId>org.apache.maven.plugins</groupId>
-                <artifactId>maven-javadoc-plugin</artifactId>
-                <version>2.9.1</version>
-                <configuration>
-                    <skip>${javadoc.skip}</skip>
-                </configuration>
-                <executions>
-                    <execution>
-                        <id>attach-javadocs</id>
-                        <goals>
-                            <goal>jar</goal>
-                        </goals>
-                        <configuration> <!-- add this to disable checking -->
-                            <additionalparam>-Xdoclint:none</additionalparam>
-                        </configuration>
-                    </execution>
-                </executions>
-            </plugin>
-            <plugin>
-                <groupId>org.apache.maven.plugins</groupId>
-                <artifactId>maven-surefire-plugin</artifactId>
-                <configuration>
-                    <trimStackTrace>false</trimStackTrace>
-                    <useFile>false</useFile>
-                    <skipTests>true</skipTests>
-                </configuration>
-            </plugin>
-            <!-- Scala Format Plug-in -->
-            <plugin>
-                <groupId>org.antipathy</groupId>
-                <artifactId>mvn-scalafmt_${scala.binary.version}</artifactId>
-                <version>1.0.3</version>
-                <configuration>
-                    <skipSources>${scalafmt.skip}</skipSources>
-                    <skipTestSources>${scalafmt.skip}</skipTestSources>
-                    <sourceDirectories> <!-- (Optional) Paths to source-directories. Overrides ${project.build.sourceDirectory} -->
-                        <sourceDirectory>${project.basedir}/src/main/scala</sourceDirectory>
-                    </sourceDirectories>
-                    <testSourceDirectories> <!-- (Optional) Paths to test-source-directories. Overrides ${project.build.testSourceDirectory} -->
-                        <param>${project.basedir}/src/test/scala</param>
-                    </testSourceDirectories>
-                </configuration>
-            </plugin>
-            <!-- Scalatest runs all Scala tests -->
-            <plugin>
-                <groupId>org.scalatest</groupId>
-                <artifactId>scalatest-maven-plugin</artifactId>
-                <version>2.0.0</version>
-                <!-- Note config is repeated in surefire config -->
-                <configuration>
-                    <reportsDirectory>${project.build.directory}/surefire-reports</reportsDirectory>
-                    <junitxml>.</junitxml>
-                    <filereports>SparkTestSuite.txt</filereports>
-                    <argLine>-ea -Xmx6g -Xss4m -XX:ReservedCodeCacheSize=${CodeCacheSize} -Dfile.encoding=UTF-8 -Duser.timezone=GMT+8 -Dio.netty.leakDetection.level=paranoid -Dio.netty.tryReflectionSetAccessible=true</argLine>
-                    <stderr/>
-                    <environmentVariables>
-                        <JAVA_HOME>${test.java.home}</JAVA_HOME>
-                    </environmentVariables>
-                    <systemProperties>
-                        <log4j.configuration>file:src/test/resources/log4j.properties</log4j.configuration>
-                    </systemProperties>
-                    <tagsToExclude>${test.exclude.tags}</tagsToExclude>
-                    <tagsToInclude>${test.include.tags}</tagsToInclude>
-                </configuration>
-                <executions>
-                    <execution>
-                        <id>test</id>
-                        <goals>
-                            <goal>test</goal>
-                        </goals>
-                    </execution>
-                </executions>
-            </plugin>
-            <plugin>
-                <groupId>org.apache.maven.plugins</groupId>
-                <artifactId>maven-shade-plugin</artifactId>
-                <version>3.2.1</version>
-                <executions>
-                    <execution>
-                        <phase>package</phase>
-                        <goals>
-                            <goal>shade</goal>
-                        </goals>
-                        <configuration>
-                            <transformers>
-                                <transformer implementation="org.apache.maven.plugins.shade.resource.ServicesResourceTransformer"/>
-                            </transformers>
-                            <relocations>
-                                <relocation>
-                                    <pattern>com.google.common</pattern>
-                                    <shadedPattern>com.pingcap.com.google.common</shadedPattern>
-                                </relocation>
-                            </relocations>
-                            <artifactSet>
-                                <includes>
-                                    <include>com.google.guava:*</include>
-                                </includes>
-                            </artifactSet>
-                        </configuration>
-                    </execution>
-                </executions>
-            </plugin>
-        </plugins>
-    </build>
-</project>