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我正在練習MongoDB與Pig的集成。 的Hadoop版本 - 1.2.1 MongoDB的版本 - 2.6.11 阿帕奇豬 - 0.14在執行與MongoDB集成的Pig腳本時獲取錯誤
請檢查代碼和建議，有什麼不好？
我使用正確的兼容JAR嗎？
--Program for Connecting MongoDB with Pig
-----------------------------------------------
REGISTER /usr/local/hadoop/pig/lib/avro-1.7.5.jar
REGISTER /usr/local/hadoop/pig/lib/json-simple-1.1.jar
REGISTER /usr/local/hadoop/pig/lib/piggybank.jar
DEFINE AvroStorage org.apache.pig.piggybank.storage.avro.AvroStorage();
REGISTER /usr/local/hadoop/pig/mongo-hadoop-core_1.0.2-1.0.0.jar
REGISTER /usr/local/hadoop/pig/mongo-hadoop-pig_0.20.205.0-1.2.0.jar
REGISTER /usr/local/hadoop/pig/mongo-java-driver-2.10.1.jar
REGISTER /usr/local/hadoop/pig/hadoop-mapred-0.21.0.jar
data = LOAD 'mongodb://localhost/MongoPracs.employees'
USING com.mongodb.hadoop.pig.MongoLoader('firstName:chararray, lastName:chararray’);
EXPLAIN data;
DUMP data;
ERROR我越來越
@ubuntu:/usr/local/hadoop/pig$ pig -x local Mongo.pig
15/12/14 07:29:48 INFO pig.ExecTypeProvider: Trying ExecType : LOCAL
15/12/14 07:29:48 INFO pig.ExecTypeProvider: Picked LOCAL as the ExecType
2015-12-14 07:29:48,698 [main] INFO org.apache.pig.Main - Apache Pig version 0.14.0 (r1640057) compiled Nov 16 2014, 18:01:24
2015-12-14 07:29:48,698 [main] INFO org.apache.pig.Main - Logging error messages to: /usr/local/hadoop-1.2.1/pig-0.14.0/pig_1450058388697.log
2015-12-14 07:29:48,809 [main] INFO org.apache.pig.impl.util.Utils - Default bootup file /home/gopal/.pigbootup not found
2015-12-14 07:29:48,884 [main] INFO org.apache.pig.backend.hadoop.executionengine.HExecutionEngine - Connecting to hadoop file system at: file:///
2015-12-14 07:29:49,909 [main] INFO org.apache.pig.newplan.logical.optimizer.LogicalPlanOptimizer - {RULES_ENABLED=[AddForEach, ColumnMapKeyPrune, ConstantCalculator, GroupByConstParallelSetter, LimitOptimizer, LoadTypeCastInserter, MergeFilter, MergeForEach, PartitionFilterOptimizer, PredicatePushdownOptimizer, PushDownForEachFlatten, PushUpFilter, SplitFilter, StreamTypeCastInserter]}
#-----------------------------------------------
# New Logical Plan:
#-----------------------------------------------
data: (Name: LOStore Schema: firstName#1:chararray,lastName#2:chararray)
|
|---data: (Name: LOLoad Schema: firstName#1:chararray,lastName#2:chararray)RequiredFields:null
#-----------------------------------------------
# Physical Plan:
#-----------------------------------------------
data: Store(fakefile:org.apache.pig.builtin.PigStorage) - scope-1
|
|---data: Load(mongodb://localhost/MongoPracs.employees:com.mongodb.hadoop.pig.MongoLoader('firstName:chararray, lastName:chararray')) - scope-0
2015-12-14 07:29:50,105 [main] INFO org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.MRCompiler - File concatenation threshold: 100 optimistic? false
2015-12-14 07:29:50,143 [main] INFO org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.MultiQueryOptimizer - MR plan size before optimization: 1
2015-12-14 07:29:50,143 [main] INFO org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.MultiQueryOptimizer - MR plan size after optimization: 1
#--------------------------------------------------
# Map Reduce Plan
#--------------------------------------------------
MapReduce node scope-2
Map Plan
data: Store(fakefile:org.apache.pig.builtin.PigStorage) - scope-1
|
|---data: Load(mongodb://localhost/MongoPracs.employees:com.mongodb.hadoop.pig.MongoLoader('firstName:chararray, lastName:chararray')) - scope-0--------
Global sort: false
----------------
2015-12-14 07:29:50,161 [main] INFO org.apache.hadoop.util.NativeCodeLoader - Loaded the native-hadoop library
2015-12-14 07:29:50,188 [main] INFO org.apache.pig.tools.pigstats.ScriptState - Pig features used in the script: UNKNOWN
2015-12-14 07:29:50,197 [main] WARN org.apache.pig.data.SchemaTupleBackend - SchemaTupleBackend has already been initialized
2015-12-14 07:29:50,198 [main] INFO org.apache.pig.newplan.logical.optimizer.LogicalPlanOptimizer - {RULES_ENABLED=[AddForEach, ColumnMapKeyPrune, ConstantCalculator, GroupByConstParallelSetter, LimitOptimizer, LoadTypeCastInserter, MergeFilter, MergeForEach, PartitionFilterOptimizer, PredicatePushdownOptimizer, PushDownForEachFlatten, PushUpFilter, SplitFilter, StreamTypeCastInserter]}
2015-12-14 07:29:50,199 [main] INFO org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.MRCompiler - File concatenation threshold: 100 optimistic? false
2015-12-14 07:29:50,199 [main] INFO org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.MultiQueryOptimizer - MR plan size before optimization: 1
2015-12-14 07:29:50,200 [main] INFO org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.MultiQueryOptimizer - MR plan size after optimization: 1
2015-12-14 07:29:50,246 [main] INFO org.apache.pig.tools.pigstats.mapreduce.MRScriptState - Pig script settings are added to the job
2015-12-14 07:29:50,254 [main] INFO org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.JobControlCompiler - mapred.job.reduce.markreset.buffer.percent is not set, set to default 0.3
2015-12-14 07:29:50,331 [main] INFO org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.JobControlCompiler - Setting up single store job
2015-12-14 07:29:50,358 [main] INFO org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.MapReduceLauncher - 1 map-reduce job(s) waiting for submission.
2015-12-14 07:29:50,383 [JobControl] WARN org.apache.hadoop.mapred.JobClient - No job jar file set. User classes may not be found. See JobConf(Class) or JobConf#setJar(String).
2015-12-14 07:29:50,444 [JobControl] INFO org.apache.hadoop.mapred.JobClient - Cleaning up the staging area file:/tmp/hadoop-gopal/mapred/staging/gopal95268095/.staging/job_local95268095_0001
2015-12-14 07:29:50,448 [main] INFO org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.MapReduceLauncher - 0% complete
2015-12-14 07:29:50,452 [main] ERROR org.apache.pig.tools.grunt.Grunt - ERROR 2117: Unexpected error when launching map reduce job.
Details at logfile: /usr/local/hadoop-1.2.1/pig-0.14.0/pig_1450058388697.log
2015-12-14 07:29:50,469 [main] INFO org.apache.pig.Main - Pig script completed in 17 seconds and 77 milliseconds (17077 ms)
Pig Stack Trace
---------------
ERROR 2117: Unexpected error when launching map reduce job.
org.apache.pig.impl.logicalLayer.FrontendException: ERROR 1066: Unable to open iterator for alias data
at org.apache.pig.PigServer.openIterator(PigServer.java:935)
at org.apache.pig.tools.grunt.GruntParser.processDump(GruntParser.java:746)
at org.apache.pig.tools.pigscript.parser.PigScriptParser.parse(PigScriptParser.java:372)
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:624)
at org.apache.pig.Main.main(Main.java:170)
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:160)
Caused by: org.apache.pig.PigException: ERROR 1002: Unable to store alias data
at org.apache.pig.PigServer.storeEx(PigServer.java:1038)
at org.apache.pig.PigServer.store(PigServer.java:997)
at org.apache.pig.PigServer.openIterator(PigServer.java:910)
... 12 more
Caused by: org.apache.pig.backend.executionengine.ExecException: ERROR 2117: Unexpected error when launching map reduce job.
at org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.MapReduceLauncher.launchPig(MapReduceLauncher.java:388)
at org.apache.pig.backend.hadoop.executionengine.HExecutionEngine.launchPig(HExecutionEngine.java:280)
at org.apache.pig.PigServer.launchPlan(PigServer.java:1390)
at org.apache.pig.PigServer.executeCompiledLogicalPlan(PigServer.java:1375)
at org.apache.pig.PigServer.storeEx(PigServer.java:1034)
... 14 more
Caused by: java.lang.RuntimeException: Could not resolve error that occured when launching job: java.lang.RuntimeException: java.lang.reflect.InvocationTargetException
at org.apache.pig.backend.hadoop20.PigJobControl.mainLoopAction(PigJobControl.java:159)
at org.apache.pig.backend.hadoop20.PigJobControl.run(PigJobControl.java:134)
at java.lang.Thread.run(Thread.java:745)
at org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.MapReduceLauncher$1.run(MapReduceLauncher.java:276)
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.hadoop20.PigJobControl.mainLoopAction(PigJobControl.java:157)
... 3 more
Caused by: java.lang.IncompatibleClassChangeError: Found class org.apache.hadoop.mapreduce.JobContext, but interface was expected
at com.mongodb.hadoop.MongoInputFormat.getSplits(MongoInputFormat.java:54)
at org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.PigInputFormat.getSplits(PigInputFormat.java:265)
at org.apache.hadoop.mapred.JobClient.writeNewSplits(JobClient.java:1054)
at org.apache.hadoop.mapred.JobClient.writeSplits(JobClient.java:1071)
at org.apache.hadoop.mapred.JobClient.access$700(JobClient.java:179)
at org.apache.hadoop.mapred.JobClient$2.run(JobClient.java:983)
at org.apache.hadoop.mapred.JobClient$2.run(JobClient.java:936)
at java.security.AccessController.doPrivileged(Native Method)
at javax.security.auth.Subject.doAs(Subject.java:415)
at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1190)
at org.apache.hadoop.mapred.JobClient.submitJobInternal(JobClient.java:936)
at org.apache.hadoop.mapred.JobClient.submitJob(JobClient.java:910)
at org.apache.hadoop.mapred.jobcontrol.Job.submit(Job.java:378)
at org.apache.hadoop.mapred.jobcontrol.JobControl.startReadyJobs(JobControl.java:247)
... 8 more
at org.apache.pig.backend.hadoop.executionengine.Launcher.setJobException(Launcher.java:293)
at org.apache.pig.backend.hadoop.executionengine.Launcher$JobControlThreadExceptionHandler.uncaughtException(Launcher.java:282)
at java.lang.Thread.dispatchUncaughtException(Thread.java:1986)
Caused by: java.lang.RuntimeException: java.lang.reflect.InvocationTargetException
at org.apache.pig.backend.hadoop20.PigJobControl.mainLoopAction(PigJobControl.java:159)
at org.apache.pig.backend.hadoop20.PigJobControl.run(PigJobControl.java:134)
at java.lang.Thread.run(Thread.java:745)
at org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.MapReduceLauncher$1.run(MapReduceLauncher.java:276)
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.hadoop20.PigJobControl.mainLoopAction(PigJobControl.java:157)
... 3 more
Caused by: java.lang.IncompatibleClassChangeError: Found class org.apache.hadoop.mapreduce.JobContext, but interface was expected
at com.mongodb.hadoop.MongoInputFormat.getSplits(MongoInputFormat.java:54)
at org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.PigInputFormat.getSplits(PigInputFormat.java:265)
at org.apache.hadoop.mapred.JobClient.writeNewSplits(JobClient.java:1054)
at org.apache.hadoop.mapred.JobClient.writeSplits(JobClient.java:1071)
at org.apache.hadoop.mapred.JobClient.access$700(JobClient.java:179)
at org.apache.hadoop.mapred.JobClient$2.run(JobClient.java:983)
at org.apache.hadoop.mapred.JobClient$2.run(JobClient.java:936)
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:1190)
at org.apache.hadoop.mapred.JobClient.submitJobInternal(JobClient.java:936)
at org.apache.hadoop.mapred.JobClient.submitJob(JobClient.java:910)
at org.apache.hadoop.mapred.jobcontrol.Job.submit(Job.java:378)
at org.apache.hadoop.mapred.jobcontrol.JobControl.startReadyJobs(JobControl.java:247)
... 8 more
================================================================================
轉儲的底部是指8個「回步」，一定要檢查全日誌的根本原因。對於查找檢查時發現此帖的人[錯誤1066：無法打開別名的迭代器]（http://stackoverflow.com/questions/34495085/error-1066-unable-to-open-iterator-for-alias-在豬通用解決方案）這裏是[通用解決方案]（http://stackoverflow.com/a/34495086/983722）。 –