For the codecs, you can choose among org.apache.hadoop.io.compress.*Codec. LzoCodec has been moved out of Hadoop (see HADOOP-4874).
- Zhijie On Wed, Feb 12, 2014 at 10:54 AM, Ted Yu <[email protected]> wrote: > What's the value for "io.compression.codecs" config parameter ? > > Thanks > > > On Tue, Feb 11, 2014 at 10:11 PM, Li Li <[email protected]> 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) >> > > -- Zhijie Shen Hortonworks Inc. http://hortonworks.com/ -- CONFIDENTIALITY NOTICE NOTICE: This message is intended for the use of the individual or entity to which it is addressed and may contain information that is confidential, privileged and exempt from disclosure under applicable law. If the reader of this message is not the intended recipient, you are hereby notified that any printing, copying, dissemination, distribution, disclosure or forwarding of this communication is strictly prohibited. If you have received this communication in error, please contact the sender immediately and delete it from your system. Thank You.
