hive udaf 用maven打包執行create temporary function 時報錯

用maven打包寫好的jar，在放到hive中做臨時函數時報錯。

錯誤信息以下：

hive> create temporary function maxvalue as "com.leaf.data.Maximum";
java.lang.SecurityException: Invalid signature file digest for Manifest main attributes
        at sun.security.util.SignatureFileVerifier.processImpl(SignatureFileVerifier.java:240)
        at sun.security.util.SignatureFileVerifier.process(SignatureFileVerifier.java:193)
        at java.util.jar.JarVerifier.processEntry(JarVerifier.java:305)
        at java.util.jar.JarVerifier.update(JarVerifier.java:216)
        at java.util.jar.JarFile.initializeVerifier(JarFile.java:341)
        at java.util.jar.JarFile.getInputStream(JarFile.java:406)
        at sun.misc.URLClassPath$JarLoader$2.getInputStream(URLClassPath.java:752)
        at sun.misc.Resource.cachedInputStream(Resource.java:77)
        at sun.misc.Resource.getByteBuffer(Resource.java:160)
        at java.net.URLClassLoader.defineClass(URLClassLoader.java:436)
        at java.net.URLClassLoader.access$100(URLClassLoader.java:71)
        at java.net.URLClassLoader$1.run(URLClassLoader.java:361)
        at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
        at java.security.AccessController.doPrivileged(Native Method)
        at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:423)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:356)
        at java.lang.Class.forName0(Native Method)
        at java.lang.Class.forName(Class.java:264)
        at org.apache.hadoop.hive.ql.exec.FunctionTask.getUdfClass(FunctionTask.java:137)
        at org.apache.hadoop.hive.ql.exec.FunctionTask.createFunction(FunctionTask.java:87)
        at org.apache.hadoop.hive.ql.exec.FunctionTask.execute(FunctionTask.java:65)
        at org.apache.hadoop.hive.ql.exec.Task.executeTask(Task.java:151)
        at org.apache.hadoop.hive.ql.exec.TaskRunner.runSequential(TaskRunner.java:65)
        at org.apache.hadoop.hive.ql.Driver.launchTask(Driver.java:1414)
        at org.apache.hadoop.hive.ql.Driver.execute(Driver.java:1192)
        at org.apache.hadoop.hive.ql.Driver.runInternal(Driver.java:1020)
        at org.apache.hadoop.hive.ql.Driver.run(Driver.java:888)
        at org.apache.hadoop.hive.cli.CliDriver.processLocalCmd(CliDriver.java:259)
        at org.apache.hadoop.hive.cli.CliDriver.processCmd(CliDriver.java:216)
        at org.apache.hadoop.hive.cli.CliDriver.processLine(CliDriver.java:413)
        at org.apache.hadoop.hive.cli.CliDriver.executeDriver(CliDriver.java:781)
        at org.apache.hadoop.hive.cli.CliDriver.run(CliDriver.java:675)
        at org.apache.hadoop.hive.cli.CliDriver.main(CliDriver.java:614)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:601)
        at org.apache.hadoop.util.RunJar.main(RunJar.java:212)
FAILED: Execution Error, return code -101 from org.apache.hadoop.hive.ql.exec.FunctionTask

這是由於在使用Maven打包的時候致使某些包的重複引用，以致於打包以後的META-INF的目錄下多出了一些*.SF,*.DSA,*.RSA文件所致

咱們能夠在jar包找到META-INF目錄，刪除掉以.SF結尾的文件便可。

或者咱們能夠在打包時剔除這些文件

<configuration>
    <filters>
        <filter>
            <artifact>*:*</artifact>
            <excludes>
                <exclude>META-INF/*.SF</exclude>
                <exclude>META-INF/*.DSA</exclude>
                <exclude>META-INF/*.RSA</exclude>
            </excludes>
        </filter>
    </filters>
</configuration>