hadoop - 无法打开别名-Pig的迭代器

Question

我试图在Pig中使用XMLLoader(Piggybank)加载XML文件，但出现一条错误消息“无法为别名B打开迭代器”。
我写了以下代码:

REGISTER /home/hdfs/spig/trunk/contrib/piggybank/java/piggybank.jar
A = LOAD '/core-site.xml'using org.apache.pig.piggybank.storage.XMLLoader('property') as (x:chararray);
B = foreach A GENERATE FLATTEN(REGEX_EXTRACT_ALL(x,'<property>\\s*<name>(.*)  </name>\\s*<value>(.*)</value>\\s*<description>(.*)</description>\\s*</property>'));
dump B;

以下是日志文件:

pig 栈痕迹

ERROR 1066: Unable to open iterator for alias A

org.apache.pig.impl.logicalLayer.FrontendException: ERROR 1066: Unable to open iterator for alias A at org.apache.pig.PigServer.openIterator(PigServer.java:935) at org.apache.pig.tools.grunt.GruntParser.processDump(GruntParser.java:754) at org.apache.pig.tools.pigscript.parser.PigScriptParser.parse(PigScriptParser.java:376) at org.apache.pig.tools.grunt.GruntParser.parseStopOnError(GruntParser.java:230) at org.apache.pig.tools.grunt.GruntParser.parseStopOnError(GruntParser.java:205) at org.apache.pig.tools.grunt.Grunt.exec(Grunt.java:81) at org.apache.pig.Main.run(Main.java:631) at org.apache.pig.Main.main(Main.java:177) 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.run(RunJar.java:221) at org.apache.hadoop.util.RunJar.main(RunJar.java:136) Caused by: java.io.IOException: Job terminated with anomalous status FAILED at org.apache.pig.PigServer.openIterator(PigServer.java:927) ... 13 more

Answer 1

您的工作之一似乎已失败。

Caused by: java.io.IOException: Job terminated with anomalous status FAILED