We have Hadoop 0.20.2 and I upgraded from Pig 0.8 to 0.8.1 and now I get the following error (downgrading to 0.8 fixed it): (Hadoop core jar does not have this class)
Backend error message --------------------- java.lang.IllegalArgumentException: Compression codec org.apache.hadoop.io.compress.DeflateCodec not found. at org.apache.hadoop.io.compress.CompressionCodecFactory.getCodecClasses(CompressionCodecFactory.java:96) at org.apache.hadoop.io.compress.CompressionCodecFactory.<init>(CompressionCodecFactory.java:134) at org.apache.hadoop.mapreduce.lib.input.LineRecordReader.initialize(LineRecordReader.java:62) at org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.PigRecordReader.initialize(PigRecordReader.java:176) at org.apache.hadoop.mapred.MapTask$NewTrackingRecordReader.initialize(MapTask.java:450) at org.apache.hadoop.mapred.MapTask.runNewMapper(MapTask.java:645) at org.apache.hadoop.mapred.MapTask.run(MapTask.java:322) at org.apache.hadoop.mapred.Child$4.run(Child.java:268) at java.security.AccessController.doPrivileged(Native Method) at javax.security.auth.Subject.doAs(Subject.java:396) at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1115) at org.apache.hadoop.mapred.Child.main(Child.java:262) Caused by: java.lang.ClassNotFoundException: org.apache.hadoop.io.compress.DeflateCodec at java.net.URLClassLoader$1.run(URLClassLoader.java:202) at java.security.AccessController.doPrivileged(Native Method) at java.net.URLClassLoader.findClass(URLClassLoader.java:190) at java.lang.ClassLoader.loadClass(ClassLoader.java:307) at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301) at java.lang.ClassLoader.loadClass(ClassLoader.java:248) at java.lang.Class.forName0(Native Method) at java.lang.Class.forName(Class.java:247) at org.apache.hadoop.conf.Configuration.getClassByName(Configuration.java:943) at org.apache.hadoop.io.compress.CompressionCodecFactory.getCodecClasses(CompressionCodecFactory.java:89) ... 11 more Pig Stack Trace --------------- ERROR 2997: Unable to recreate exception from backed error: java.lang.IllegalArgumentException: Compression codec org.apache.hadoop.io.compress.DeflateCodec not found. org.apache.pig.backend.executionengine.ExecException: ERROR 2997: Unable to recreate exception from backed error: java.lang.IllegalArgumentException: Compression codec org.apache.hadoop.io.compress.DeflateCodec not found. at org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.Launcher.getErrorMessages(Launcher.java:221) at org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.Launcher.getStats(Launcher.java:151) at org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.MapReduceLauncher.launchPig(MapReduceLauncher.java:337) at org.apache.pig.backend.hadoop.executionengine.HExecutionEngine.execute(HExecutionEngine.java:382) at org.apache.pig.PigServer.executeCompiledLogicalPlan(PigServer.java:1209) at org.apache.pig.PigServer.execute(PigServer.java:1201) at org.apache.pig.PigServer.access$100(PigServer.java:129) at org.apache.pig.PigServer$Graph.execute(PigServer.java:1528) at org.apache.pig.PigServer.executeBatchEx(PigServer.java:373) at org.apache.pig.PigServer.executeBatch(PigServer.java:340) at org.apache.pig.tools.grunt.GruntParser.executeBatch(GruntParser.java:115) at org.apache.pig.tools.grunt.GruntParser.parseStopOnError(GruntParser.java:172) at org.apache.pig.tools.grunt.GruntParser.parseStopOnError(GruntParser.java:144) at org.apache.pig.tools.grunt.Grunt.exec(Grunt.java:90) at org.apache.pig.Main.run(Main.java:500) at org.apache.pig.Main.main(Main.java:107) ================================================================================ -Ayon See My Photos on Flickr Also check out my Blog for answers to commonly asked questions.
