这个问题该怎么排查
/Library/Java/JavaVirtualMachines/jdk1.7.0_80.jdk/Contents/Home/bin/java -Dmaven.home=/Users/smog/Documents/apache-maven-3.0.5 -Dclassworlds.conf=/Users/smog/Documents/apache-maven-3.0.5/bin/m2.conf -Didea.launcher.port=7532 "-Didea.launcher.bin.path=/Applications/IntelliJ IDEA 15.app/Contents/bin" -Dfile.encoding=UTF-8 -classpath "/Users/smog/Documents/apache-maven-3.0.5/boot/plexus-classworlds-2.4.jar:/Applications/IntelliJ IDEA 15.app/Contents/lib/idea_rt.jar" com.intellij.rt.execution.application.AppMain org.codehaus.classworlds.Launcher -Didea.version=15.0.6 org.mybatis.generator:mybatis-generator-maven-plugin:1.3.2:generate
[INFO] Scanning for projects...
[WARNING]
[WARNING] Some problems were encountered while building the effective model for com:mmall:war:1.0-SNAPSHOT
[WARNING] 'dependencies.dependency.(groupId:artifactId:type:classifier)' must be unique: redis.clients:jedis:jar -> duplicate declaration of version 2.9.0 @ line 248, column 17
[WARNING] 'build.plugins.plugin.version' for org.apache.maven.plugins:maven-compiler-plugin is missing. @ line 271, column 15
[WARNING]
[WARNING] It is highly recommended to fix these problems because they threaten the stability of your build.
[WARNING]
[WARNING] For this reason, future Maven versions might no longer support building such malformed projects.
[WARNING]
[INFO]
[INFO] ------------------------------------------------------------------------
[INFO] Building mmall Maven Webapp 1.0-SNAPSHOT
[INFO] ------------------------------------------------------------------------
[INFO]
[INFO] --- mybatis-generator-maven-plugin:1.3.2:generate (default-cli) @ mmall ---
[INFO] Connecting to the Database
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 4.305s
[INFO] Finished at: Wed Jun 21 22:07:47 PHT 2017
[INFO] Final Memory: 7M/123M
[INFO] ------------------------------------------------------------------------
[ERROR] Failed to execute goal org.mybatis.generator:mybatis-generator-maven-plugin:1.3.2:generate (default-cli) on project mmall: Communications link failure
[ERROR]
[ERROR] The last packet sent successfully to the server was 0 milliseconds ago. The driver has not received any packets from the server.
[ERROR] -> [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/MojoExecutionException
Process finished with exit code 1
