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我試圖使用JSonLoader形式的大象 - 鳥 - 豬包。
我的劇本很簡單：從大象 - 鳥 - 豬使用JsonLoader時出錯
register elephant-bird-pig-4.5.jar
register elephant-bird-hadoop-compat-4.5.jar
A = load '1_record_2.json' USING com.twitter.elephantbird.pig.load.JsonLoader('-nestedLoad');
DUMP A
我得到一個錯誤：
2014-09-30 16:15:32,439 [main] INFO org.apache.hadoop.conf.Configuration.deprecation - fs.default.name is deprecated. Instead, use fs.defaultFS
2014-09-30 16:15:32,447 [main] INFO org.apache.pig.tools.pigstats.ScriptState - Pig features used in the script: UNKNOWN
2014-09-30 16:15:32,448 [main] INFO org.apache.pig.newplan.logical.optimizer.LogicalPlanOptimizer - {RULES_ENABLED=[AddForEach, ColumnMapKeyPrune, GroupByConstParallelSetter, LimitOptimizer, LoadTypeCastInserter, MergeFilter, MergeForEach, NewPartitionFilterOptimizer, PartitionFilterOptimizer, PushDownForEachFlatten, PushUpFilter, SplitFilter, StreamTypeCastInserter], RULES_DISABLED=[FilterLogicExpressionSimplifier]}
2014-09-30 16:15:32,449 [main] INFO org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.MRCompiler - File concatenation threshold: 100 optimistic? false
2014-09-30 16:15:32,450 [main] INFO org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.MultiQueryOptimizer - MR plan size before optimization: 1
2014-09-30 16:15:32,450 [main] INFO org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.MultiQueryOptimizer - MR plan size after optimization: 1
2014-09-30 16:15:32,464 [main] INFO org.apache.hadoop.yarn.client.RMProxy - Connecting to ResourceManager at hadoop1.unx.t-mobile.pl/10.242.8.131:8050
2014-09-30 16:15:32,466 [main] INFO org.apache.pig.tools.pigstats.ScriptState - Pig script settings are added to the job
2014-09-30 16:15:32,466 [main] INFO org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.JobControlCompiler - mapred.job.reduce.markreset.buffer.percent is not set, set to default 0.3
2014-09-30 16:15:32,467 [main] ERROR org.apache.pig.tools.grunt.Grunt - ERROR 2998: Unhandled internal error. com/twitter/elephantbird/util/HadoopCompat
Details at logfile: pig_1412081068149.log
我不知道什麼是失蹤。你能提出一些建議嗎？
文件pig_1412081068149.log包含：
Pig Stack Trace
---------------
ERROR 2998: Unhandled internal error. com/twitter/elephantbird/util/HadoopCompat
java.lang.NoClassDefFoundError: com/twitter/elephantbird/util/HadoopCompat
at com.twitter.elephantbird.pig.load.LzoBaseLoadFunc.setLocation(LzoBaseLoadFunc.java:93)
at org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.JobControlCompiler.getJob(JobControlCompiler.java:477)
at org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.JobControlCompiler.compile(JobControlCompiler.java:298)
at org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.MapReduceLauncher.launchPig(MapReduceLauncher.java:191)
at org.apache.pig.PigServer.launchPlan(PigServer.java:1324)
at org.apache.pig.PigServer.executeCompiledLogicalPlan(PigServer.java:1309)
at org.apache.pig.PigServer.storeEx(PigServer.java:980)
at org.apache.pig.PigServer.store(PigServer.java:944)
at org.apache.pig.PigServer.openIterator(PigServer.java:857)
at org.apache.pig.tools.grunt.GruntParser.processDump(GruntParser.java:774) etc...
缺少什麼類（java.lang.NoClassDefFoundError）？我應該添加哪些庫？
感謝
帕維爾
NoClassDefFoundError通常表示您有不兼容的JAR文件。 – 2014-10-09 12:30:15