Question

我在我的Hadoop系统上配置了Pig，但是当我启动它时，我收到了与log4j相关的错误。我错过了什么吗？

谢谢！

$ pig
log4j:ERROR Could not instantiate class [org.apache.hadoop.log.metrics.EventCounter].
java.lang.ClassNotFoundException: org.apache.hadoop.log.metrics.EventCounter
        at java.net.URLClassLoader$1.run(URLClassLoader.java:217)
        at java.security.AccessController.doPrivileged(Native Method)
        at java.net.URLClassLoader.findClass(URLClassLoader.java:205)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:321)
        at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:294)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:266)
        at java.lang.Class.forName0(Native Method)
        at java.lang.Class.forName(Class.java:186)
        at org.apache.log4j.helpers.Loader.loadClass(Loader.java:179)
        ...
log4j:ERROR Could not instantiate appender named "EventCounter".
2014-02-14 10:45:46,512 [main] INFO  org.apache.pig.Main - Apache Pig version 0.11.1 (r1459641) compiled Mar 22 2013, 02:13:53
2014-02-14 10:45:46,513 [main] INFO  org.apache.pig.Main - Logging error messages to: /usr/local/hadoop/pig_1392381946511.log
2014-02-14 10:45:46,541 [main] INFO  org.apache.pig.impl.util.Utils - Default bootup file /home/hduser/.pigbootup not found
2014-02-14 10:45:46,695 [main] INFO  org.apache.pig.backend.hadoop.executionengine.HExecutionEngine - Connecting to hadoop file system at: maprfs:///
2014-02-14 10:45:46,767 [main] INFO  org.apache.hadoop.util.NativeCodeLoader - Loaded the native-hadoop library
2014-02-14 10:45:46,768 [main] INFO  org.apache.hadoop.security.JniBasedUnixGroupsMapping - Using JniBasedUnixGroupsMapping for Group resolution
2014-02-14 10:45:46,853 [main] INFO  org.apache.pig.backend.hadoop.executionengine.HExecutionEngine - Connecting to map-reduce job tracker at: maprfs:///
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Answer 1

首先尝试通过

在本地运行猪脚本

           pig -x local <filename>.pig

如果某些错误消息显示在本地运行它也尝试 www.youtube.com/watch?v=BSsVvZnGz0M设置视频，如果您使用的是ubuntu 12.04LTS，这是正确的

启动Pig时出错

1 个答案: