Also, reading some uncompressed data off the same cluster using PigStorage shows a failure to even read the data in the first place :|
-K On Tue, Mar 08, 2011 at 09:24:18PM -0500, Kris Coward wrote: > > None of the nodes have more than 20% utilization on any of their disks; > so it must be the cluster figuring that it can get away with this sort > of thing when the sysadmin's not around to set it straight.. clearly a > cluster of redundant/load-sharing sysadmins is also needed :) > > -K > > On Tue, Mar 08, 2011 at 03:24:50PM -0800, Dmitriy Ryaboy wrote: > > Check task logs. I am guessing you ran out of either hdfs or local disk on > > the nodes. > > > > Also, never let your sysadmin go on vacation, that's what makes things > > break! :) > > > > D > > > > On Tue, Mar 8, 2011 at 2:53 PM, Kris Coward <[email protected]> wrote: > > > > > > > > So I queued up a batch of jobs last night to run overnight (and into the > > > day a bit, owing to to a bottleneck on the scheduler the way that things > > > are currently implemented), made sure they were running correctly, went > > > to sleep, and when I woke up in the morning, they were failing all over > > > the place. > > > > > > Since each of these jobs was basicaly the same pig script being run with > > > a different set of parameters, I tried re-reunning it with the > > > parameters that it had run (successfully) with the night before, and it > > > also failed. So I started whittling away at steps to try and find the > > > origin of the failure, until I was even getting a failure loading the > > > initial data, and dumping it out. Basically, I've reduced things to a > > > matter of > > > > > > apa = LOAD > > > '/rawfiles/08556ecf5c6841d59eb702e9762e649a/{1296432000,1296435600,1296439200,1296442800,1296446400,1296450000,1296453600,1296457200,1296460800,1296464400,1296468000,1296471600,1296475200,1296478800,1296482400,1296486000,1296489600,1296493200,1296496800,1296500400,1296504000,1296507600,1296511200,1296514800}/*/apa' > > > USING com.twitter.elephantbird.pig.load.LzoTokenizedLoader(',') AS > > > (timestamp:long, type:chararray, appkey:chararray, uid:chararray, > > > uniq:chararray, shortUniq:chararray, profUid:chararray, addr:chararray, > > > ref:chararray); > > > dump apa; > > > > > > and after getting all the happy messages from the loader like: > > > > > > 2011-03-08 21:48:46,454 [Thread-12] INFO > > > com.twitter.elephantbird.pig.load.LzoBaseLoadFunc - Got 117 LZO slices in > > > total. > > > 2011-03-08 21:48:48,044 [main] INFO > > > org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.MapReduceLauncher > > > - 0% complete > > > 2011-03-08 21:50:17,612 [main] INFO > > > org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.MapReduceLauncher > > > - 100% complete > > > > > > It went straight to: > > > > > > 2011-03-08 21:50:17,612 [main] ERROR > > > org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.MapReduceLauncher > > > - 1 map reduce job(s) failed! > > > 2011-03-08 21:50:17,662 [main] ERROR > > > org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.MapReduceLauncher > > > - Failed to produce result in: > > > "hdfs://master.hadoop:9000/tmp/temp-2121884028/tmp-268519128" > > > 2011-03-08 21:50:17,664 [main] INFO > > > org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.MapReduceLauncher > > > - Failed! > > > 2011-03-08 21:50:17,668 [main] ERROR org.apache.pig.tools.grunt.Grunt - > > > ERROR 1066: Unable to open iterator for alias apa > > > Details at logfile: /home/kris/pig_1299620898192.log > > > > > > And looking at the stack trace in the logfile, I've got: > > > > > > Pig Stack Trace > > > --------------- > > > ERROR 1066: Unable to open iterator for alias apa > > > > > > org.apache.pig.impl.logicalLayer.FrontendException: ERROR 1066: Unable to > > > open iterator for alias apa > > > 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: java.io.IOException: Job terminated with anomalous status > > > FAILED > > > at org.apache.pig.PigServer.openIterator(PigServer.java:476) > > > ... 6 more > > > > > > ================================================================================ > > > > > > My sysadmin's off on vacation for the week, but left information on the > > > scripts to restart the cluster, so I tried that, and the problem is > > > still persisting, so I was hoping someone here might have an idea what's > > > wrong (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
