Question

我有一个带有默认LZO压缩的日志文件和一个使用Hadoop-LZO生成的.index文件，但是当我运行一个简单的Pig文件来使用LzoPigStorage检索前100条记录时，我得到以下异常：

Message: Unexpected System Error Occured: java.lang.RuntimeException: java.lang.reflect.InvocationTargetException
    at org.apache.pig.backend.hadoop23.PigJobControl.submit(PigJobControl.java:130)
    at org.apache.pig.backend.hadoop23.PigJobControl.run(PigJobControl.java:191)
    at java.lang.Thread.run(Thread.java:724)
    at org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.MapReduceLauncher$1.run(MapReduceLauncher.java:257)
Caused by: java.lang.reflect.InvocationTargetException
    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:606)
    at org.apache.pig.backend.hadoop23.PigJobControl.submit(PigJobControl.java:128)
    ... 3 more
Caused by: java.lang.IncompatibleClassChangeError: Found interface org.apache.hadoop.mapreduce.JobContext, but class was expected
    at com.twitter.elephantbird.mapreduce.input.LzoInputFormat.listStatus(LzoInputFormat.java:55)
    at org.apache.hadoop.mapreduce.lib.input.FileInputFormat.getSplits(FileInputFormat.java:269)
    at com.twitter.elephantbird.mapreduce.input.LzoInputFormat.getSplits(LzoInputFormat.java:111)
    at org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.PigInputFormat.getSplits(PigInputFormat.java:274)
    at org.apache.hadoop.mapreduce.JobSubmitter.writeNewSplits(JobSubmitter.java:452)
    at org.apache.hadoop.mapreduce.JobSubmitter.writeSplits(JobSubmitter.java:469)
    at org.apache.hadoop.mapreduce.JobSubmitter.submitJobInternal(JobSubmitter.java:366)
    at org.apache.hadoop.mapreduce.Job$11.run(Job.java:1269)
    at org.apache.hadoop.mapreduce.Job$11.run(Job.java:1266)
    at java.security.AccessController.doPrivileged(Native Method)
    at javax.security.auth.Subject.doAs(Subject.java:415)
    at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1408)
    at org.apache.hadoop.mapreduce.Job.submit(Job.java:1266)
    at org.apache.hadoop.mapreduce.lib.jobcontrol.ControlledJob.submit(ControlledJob.java:336)

我正在运行Hadoop 2.0，Pig 0.11和elephant-bird 2.2.3

Answer 1

我不使用象鸟，所以我不完全确定这是问题。

但是看着他们的build for v2.2.3，它是针对hadoop-0.20.2和pig-0.9.2进行编译的。我在Pig上运行UDF时遇到的问题比UDF编译的版本更新。

您是否可以将elephant-bird升级到更新版本或针对正确的库重新编译？

尝试使用LzoPigStorage和elephant-bird加载索引的LZO文件

1 个答案: