What's the value for "io.compression.codecs" config parameter ? Thanks
On Tue, Feb 11, 2014 at 10:11 PM, Li Li <fancye...@gmail.com> wrote: > I am runing example of wordcout but encount an exception: > I googled and know lzo compression's license is incompatible with apache's > so it's not built in. > the question is I am using default configuration of hadoop 1.2.1, why > it need lzo? > anothe question is, what's Cleaning up the staging area mean? > > > ./bin/hadoop jar hadoop-examples-1.2.1.jar wordcount /lili/data.txt > /lili/test > > 14/02/12 14:06:10 INFO input.FileInputFormat: Total input paths to process > : 1 > 14/02/12 14:06:10 INFO mapred.JobClient: Cleaning up the staging area > hdfs:// > 172.19.34.24:8020/home/hadoop/dfsdir/hadoop-hadoop/mapred/staging/hadoop/.staging/job_201401080916_0216 > java.lang.IllegalArgumentException: Compression codec > com.hadoop.compression.lzo.LzoCodec not found. > at > org.apache.hadoop.io.compress.CompressionCodecFactory.getCodecClasses(CompressionCodecFactory.java:116) > at > org.apache.hadoop.io.compress.CompressionCodecFactory.<init>(CompressionCodecFactory.java:156) > at > org.apache.hadoop.mapreduce.lib.input.TextInputFormat.isSplitable(TextInputFormat.java:47) > at > org.apache.hadoop.mapreduce.lib.input.FileInputFormat.getSplits(FileInputFormat.java:258) > 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$2.run(JobClient.java:936) > at java.security.AccessController.doPrivileged(Native Method) > at javax.security.auth.Subject.doAs(Subject.java:415) > at > org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1190) > at > org.apache.hadoop.mapred.JobClient.submitJobInternal(JobClient.java:936) > at org.apache.hadoop.mapreduce.Job.submit(Job.java:550) > at org.apache.hadoop.mapreduce.Job.waitForCompletion(Job.java:580) > at org.apache.hadoop.examples.WordCount.main(WordCount.java:82) > at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) > at > sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) > at > sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) > at java.lang.reflect.Method.invoke(Method.java:601) > at > org.apache.hadoop.util.ProgramDriver$ProgramDescription.invoke(ProgramDriver.java:68) > at > org.apache.hadoop.util.ProgramDriver.driver(ProgramDriver.java:139) > at > org.apache.hadoop.examples.ExampleDriver.main(ExampleDriver.java:64) > 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:601) > at org.apache.hadoop.util.RunJar.main(RunJar.java:160) > Caused by: java.lang.ClassNotFoundException: > com.hadoop.compression.lzo.LzoCodec > at java.net.URLClassLoader$1.run(URLClassLoader.java:366) > at java.net.URLClassLoader$1.run(URLClassLoader.java:355) > at java.security.AccessController.doPrivileged(Native Method) > at java.net.URLClassLoader.findClass(URLClassLoader.java:354) > at java.lang.ClassLoader.loadClass(ClassLoader.java:423) > at java.lang.ClassLoader.loadClass(ClassLoader.java:356) > at java.lang.Class.forName0(Native Method) > at java.lang.Class.forName(Class.java:264) > at > org.apache.hadoop.conf.Configuration.getClassByName(Configuration.java:810) > at > org.apache.hadoop.io.compress.CompressionCodecFactory.getCodecClasses(CompressionCodecFactory.java:109) >
