我在CDH4中使用pig--0.11.0+28，当我运行任何pig作业时，我都会遇到这个异常。我也发生在本地模式下。有什么想法吗？
2013-07-08 13:53:44,035 [main] WARN org.apache.pig.backend.hadoop23.PigJobControl - falling back to default JobControl (not using hadoop 0.23 ?)
java.lang.NoSuchFieldException: jobsInProgress
at java.lang.Class.getDeclaredField(Class.java:1938)
at org.apache.pig.backend.hadoop23.PigJobControl.<clinit>(PigJobControl.java:58)
at org.apache.pig.backend.hadoop.executionengine.shims.HadoopShims.newJobControl(HadoopShims.java:102)
at org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.JobControlCompiler.compile(JobControlCompiler.java:285)
at org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.MapReduceLauncher.launchPig(MapReduceLauncher.java:177)
at org.apache.pig.PigServer.launchPlan(PigServer.java:1266)
at org.apache.pig.PigServer.executeCompiledLogicalPlan(PigServer.java:1251)
at org.apache.pig.PigServer.execute(PigServer.java:1241)
at org.apache.pig.PigServer.executeBatch(PigServer.java:335)
at org.apache.pig.tools.grunt.GruntParser.executeBatch(GruntParser.java:137)
at org.apache.pig.tools.grunt.GruntParser.parseStopOnError(GruntParser.java:198)
at org.apache.pig.tools.grunt.GruntParser.parseStopOnError(GruntParser.java:170)
at org.apache.pig.tools.grunt.Grunt.exec(Grunt.java:84)
at org.apache.pig.Main.run(Main.java:604)
at org.apache.pig.Main.main(Main.java:157)
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.hadoop.util.RunJar.main(RunJar.java:208)
此WARN在运行时是无害的。
Pig的设计可以与许多版本配合使用。
由于CDH4提供了带有MR1（0.20/1.x）MR框架选项的ApacheHadoop2.x，Pig在这里对预期内容感到困惑。它检测到一个2.x版本，并试图加载一个MR2风格的提交程序，但如果你使用MR1，那么它会打印这个嘈杂的WARN，然后返回到MR1，并且仍然成功地进行。错误后面跟着一条与org.apache.pig.backend.hadoop23.PigJobControl - falling back to default相同或类似的消息，指示这一点。