Kris, Check the pig log file. Often "unable to create input slice" is caused by errors such as not being able to find your loader class, or some dependency of your loader class.
D On Tue, Mar 1, 2011 at 1:48 PM, Kris Coward <[email protected]> wrote: > > I get the output: > > rw-r--r-- 2 kris supergroup 172694 2011-02-25 01:59 > /path/to/file/item/ex/subdir > > -K > > On Tue, Mar 01, 2011 at 12:46:31PM -0800, Dmitriy Ryaboy wrote: > > What happens when you "hadoop fs -lsr" those paths? > > > > D > > > > On Sun, Feb 27, 2011 at 7:47 PM, Kris Coward <[email protected]> wrote: > > > > > > > > So I finally got a couple of test scripts running on my cluster to take > > > a sample data file, load it, do a little processing, store it, load it, > > > do a little more processing, and dump the results. > > > > > > Once these were working, I set to parsing and storing some real data, > > > but when got an "Unable to create input slice" error when trying to > load > > > this data back out again. This happened with each of: > > > > > > foo = LOAD '/path/to/file/{item,list,glob}/*/subdir' USING > > > com.twitter.elephantbird.pig.load.LzoTokenizedLoader(',') AS > (schema:...); > > > foo = LOAD '/path/to/file/item/*/subdir' USING > > > com.twitter.elephantbird.pig.load.LzoTokenizedLoader(',') AS > (schema:...); > > > foo = LOAD '/path/to/file/item/ex/subdir' USING > > > com.twitter.elephantbird.pig.load.LzoTokenizedLoader(',') AS > (schema:...); > > > > > > and yielded the error (the same each time, except for the name/glob > > > used): > > > > > > ERROR 2997: Unable to recreate exception from backend error: > > > org.apache.pig.backend.executionengine.ExecException: ERROR 2118: > Unable to > > > create input slice for: > > > hdfs://master.hadoop:9000//path/to/file/item/ex/subdir > > > org.apache.pig.impl.logicalLayer.FrontendException: ERROR 1066: Unable > to > > > open iterator for alias foo > > > at org.apache.pig.PigServer.openIterator(PigServer.java:482) > > > at > > > > org.apache.pig.tools.grunt.GruntParser.processDump(GruntParser.java:539) > > > at > > > > org.apache.pig.tools.pigscript.parser.PigScriptParser.parse(PigScriptParser.java:241) > > > at > > > > org.apache.pig.tools.grunt.GruntParser.parseStopOnError(GruntParser.java:168) > > > at > > > > org.apache.pig.tools.grunt.GruntParser.parseStopOnError(GruntParser.java:144) > > > at org.apache.pig.tools.grunt.Grunt.run(Grunt.java:75) > > > at org.apache.pig.Main.main(Main.java:352) > > > Caused by: org.apache.pig.backend.executionengine.ExecException: ERROR > > > 2997: Unable to recreate exception from backend error: > > > org.apache.pig.backend.executionengine.ExecException: ERROR 2118: > Unable to > > > create input slice for: > > > hdfs://master.hadoop:9000/path/to/file/item/ex/subdir > > > at > > > > org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.Launcher.getStats(Launcher.java:176) > > > at > > > > org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.MapReduceLauncher.launchPig(MapReduceLauncher.java:253) > > > at > > > > org.apache.pig.backend.hadoop.executionengine.HExecutionEngine.execute(HExecutionEngine.java:249) > > > at > > > org.apache.pig.PigServer.executeCompiledLogicalPlan(PigServer.java:781) > > > at org.apache.pig.PigServer.store(PigServer.java:529) > > > at org.apache.pig.PigServer.openIterator(PigServer.java:465) > > > ... 6 more > > > > > > > > > Anyone have any suggestions why this may be happening and how to fix > it? > > > > > > Thanks, > > > Kris > > > > > > -- > > > Kris Coward > http://unripe.melon.org/ > > > GPG Fingerprint: 2BF3 957D 310A FEEC 4733 830E 21A4 05C7 1FEB 12B3 > > > > > -- > Kris Coward http://unripe.melon.org/ > GPG Fingerprint: 2BF3 957D 310A FEEC 4733 830E 21A4 05C7 1FEB 12B3 >
