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POLoading data from HDFS does not work with Elephantbird
 

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  1. POLoading data from HDFS does not work with Elephantbird
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    <p>I am trying to process data with elephantbird in pig but I don't succeed in loading the data. Here is my pig script:</p> <pre><code>register 'lib/elephant-bird-core-3.0.9.jar'; register 'lib/elephant-bird-pig-3.0.9.jar'; register 'lib/google-collections-1.0.jar'; register 'lib/json-simple-1.1.jar'; twitter = LOAD 'statuses.log.2013-04-01-00' USING com.twitter.elephantbird.pig.load.JsonLoader('-nestedLoad'); DUMP twitter; </code></pre> <p>The output I get is</p> <pre><code>[main] INFO org.apache.pig.Main - Apache Pig version 0.11.0-cdh4.3.0 (rexported) compiled May 27 2013, 20:48:21 [main] INFO org.apache.pig.Main - Logging error messages to: /home/hadoop1/twitter_test/pig_1374834826168.log [main] INFO org.apache.pig.impl.util.Utils - Default bootup file /home/hadoop1/.pigbootup not found [main] INFO org.apache.pig.backend.hadoop.executionengine.HExecutionEngine - Connecting to hadoop file system at: hdfs://master.hadoop:8020 [main] INFO org.apache.pig.backend.hadoop.executionengine.HExecutionEngine - Connecting to map-reduce job tracker at: master.hadoop:8021 [main] INFO org.apache.pig.tools.pigstats.ScriptState - Pig features used in the script: UNKNOWN [main] INFO org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.MRCompiler - File concatenation threshold: 100 optimistic? false [main] INFO org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.MultiQueryOptimizer - MR plan size before optimization: 1 [main] INFO org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.MultiQueryOptimizer - MR plan size after optimization: 1 [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.&lt;clinit&gt;(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.storeEx(PigServer.java:933) at org.apache.pig.PigServer.store(PigServer.java:900) at org.apache.pig.PigServer.openIterator(PigServer.java:813) at org.apache.pig.tools.grunt.GruntParser.processDump(GruntParser.java:696) at org.apache.pig.tools.pigscript.parser.PigScriptParser.parse(PigScriptParser.java:320) at org.apache.pig.tools.grunt.GruntParser.parseStopOnError(GruntParser.java:194) 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) [main] INFO org.apache.pig.tools.pigstats.ScriptState - Pig script settings are added to the job [main] INFO org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.JobControlCompiler - mapred.job.reduce.markreset.buffer.percent is not set, set to default 0.3 [main] INFO org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.JobControlCompiler - Using reducer estimator: org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.InputSizeReducerEstimator [main] INFO org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.InputSizeReducerEstimator - BytesPerReducer=1000000000 maxReducers=999 totalInputFileSize=656085089 [main] INFO org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.JobControlCompiler - Setting Parallelism to 1 [main] INFO org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.JobControlCompiler - creating jar file Job6015425922938886053.jar [main] INFO org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.JobControlCompiler - jar file Job6015425922938886053.jar created [main] INFO org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.JobControlCompiler - Setting up single store job [main] INFO org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.MapReduceLauncher - 1 map-reduce job(s) waiting for submission. [JobControl] WARN org.apache.hadoop.mapred.JobClient - Use GenericOptionsParser for parsing the arguments. Applications should implement Tool for the same. [JobControl] INFO org.apache.hadoop.mapreduce.lib.input.FileInputFormat - Total input paths to process : 1 [JobControl] INFO org.apache.pig.backend.hadoop.executionengine.util.MapRedUtil - Total input paths (combined) to process : 5 [main] INFO org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.MapReduceLauncher - 0% complete [main] INFO org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.MapReduceLauncher - HadoopJobId: job_201307261031_0050 [main] INFO org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.MapReduceLauncher - Processing aliases twitter [main] INFO org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.MapReduceLauncher - detailed locations: M: twitter[10,10] C: R: [main] INFO org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.MapReduceLauncher - More information at: http://master.hadoop:50030/jobdetails.jsp?jobid=job_201307261031_0050 [main] WARN org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.MapReduceLauncher - Ooops! Some job has failed! Specify -stop_on_failure if you want Pig to stop immediately on failure. [main] INFO org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.MapReduceLauncher - job job_201307261031_0050 has failed! Stop running all dependent jobs [main] INFO org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.MapReduceLauncher - 100% complete [main] ERROR org.apache.pig.tools.pigstats.SimplePigStats - ERROR 2997: Unable to recreate exception from backed error: Error: Found interface org.apache.hadoop.mapreduce.Counter, but class was expected [main] ERROR org.apache.pig.tools.pigstats.PigStatsUtil - 1 map reduce job(s) failed! [main] INFO org.apache.pig.tools.pigstats.SimplePigStats - Script Statistics: HadoopVersion PigVersion UserId StartedAt FinishedAt Features 2.0.0-cdh4.3.0 0.11.0-cdh4.3.0 hadoop1 2013-07-26 12:33:48 2013-07-26 12:34:23 UNKNOWN Failed! Failed Jobs: JobId Alias Feature Message Outputs job_201307261031_0050 twitter MAP_ONLY Message: Job failed! hdfs://master.hadoop:8020/tmp/temp971280905/tmp1376631504, Input(s): Failed to read data from "hdfs://master.hadoop:8020/user/hadoop1/statuses.log.2013-04-01-00" Output(s): Failed to produce result in "hdfs://master.hadoop:8020/tmp/temp971280905/tmp1376631504" Counters: Total records written : 0 Total bytes written : 0 Spillable Memory Manager spill count : 0 Total bags proactively spilled: 0 Total records proactively spilled: 0 Job DAG: job_201307261031_0050 [main] INFO org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.MapReduceLauncher - Failed! [main] ERROR org.apache.pig.tools.grunt.Grunt - ERROR 2997: Unable to recreate exception from backed error: Error: Found interface org.apache.hadoop.mapreduce.Counter, but class was expected Details at logfile: /home/hadoop1/twitter_test/pig_1374834826168.log </code></pre> <p>The file exists and is accessible:</p> <pre><code>$ hdfs dfs -ls /user/hadoop1/statuses.log.2013-04-01-00 Found 1 items -rw-r--r-- 3 hadoop1 supergroup 656085089 2013-07-26 11:53 /user/hadoop1/statuses.log.2013-04-01-00 </code></pre> <p>This seems to be a general problem with the pig version shipped with Cloudera 4.6.0: the problem seems to be the line that says </p> <pre><code>[main] ERROR org.apache.pig.tools.pigstats.SimplePigStats - ERROR 2997: Unable to recreate exception from backed error: Error: Found interface org.apache.hadoop.mapreduce.Counter, but class was expected </code></pre> <p>I got a similar error when running another user defined function for loading data:</p> <pre><code>[main] ERROR org.apache.pig.tools.pigstats.SimplePigStats - ERROR 2997: Unable to recreate exception from backed error: Error: Found interface org.apache.hadoop.mapreduce.TaskAttemptContext, but class was expected </code></pre> <p>When I force pig to local mode (''-x local'') I get the more obvious error</p> <pre><code>Caused by: java.lang.IncompatibleClassChangeError: Found interface org.apache.hadoop.mapreduce.TaskAttemptContext, but class was expected </code></pre> <p>So the version of Hadoop pig uses seems to be incompatible with the one shipped with Cloudera, I guess. </p>
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