Hi Alex, org.apache.hadoop.io.compress.GzipCodec is in the hadoop-core-*.jar. You don't need to add /usr/local/hadoop/hadoop-0.20.2/lib/ to the classpath since hadoop shell script does it for you. What is exactly the command you are trying to run? Can you also give the output of 'env | grep -i hadoop' and 'env | grep -i classpath'.
Alex K On Sat, Jul 31, 2010 at 1:38 AM, Alex Luya <alexander.l...@gmail.com> wrote: > Hello: > I have followed this link:http://code.google.com/p/hadoop-gpl- > compression/wiki/FAQ<http://code.google.com/p/hadoop-gpl-%0Acompression/wiki/FAQ>to > install lzo compression library,and copy > hadoop-lzo-0.4.4.jar to $HADOOP_HOME/lib,and all files under > ..lib/native/Linux-amd64-64 to $HADOOP_HOME/lib/native/Linux-amd64-64, > and run example,but got this errors: > > ---------------------------------------------------------------------------------------------------------------- > Exception in thread "main" java.lang.IllegalArgumentException: Compression > codec > org.apache.hadoop.io.compress.GzipCodec 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 > com.hadoop.compression.lzo.LzoIndex.createIndex(LzoIndex.java:202) > at > com.hadoop.compression.lzo.LzoIndexer.indexSingleFile(LzoIndexer.java:117) > at > com.hadoop.compression.lzo.LzoIndexer.indexInternal(LzoIndexer.java:98) > at com.hadoop.compression.lzo.LzoIndexer.index(LzoIndexer.java:52) > at com.hadoop.compression.lzo.LzoIndexer.main(LzoIndexer.java:137) > at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) > at > > sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) > at > > sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) > at java.lang.reflect.Method.invoke(Method.java:597) > at org.apache.hadoop.util.RunJar.main(RunJar.java:156) > Caused by: java.lang.ClassNotFoundException: > org.apache.hadoop.io.compress.GzipCodec > at java.net.URLClassLoader$1.run(URLClassLoader.java:202) > at java.security.AccessController.doPrivileged(Native Method) > at java.net.URLClassLoader.findClass(URLClassLoader.java:190) > at java.lang.ClassLoader.loadClass(ClassLoader.java:307) > at java.lang.ClassLoader.loadClass(ClassLoader.java:248) > at java.lang.Class.forName0(Native Method) > at java.lang.Class.forName(Class.java:247) > at > org.apache.hadoop.conf.Configuration.getClassByName(Configuration.java:762) > at > > org.apache.hadoop.io.compress.CompressionCodecFactory.getCodecClasses(CompressionCodecFactory.java:89) > ... 11 more > > > > ---------------------------------------------------------------------------------------------------------------- > > and then I try to add this to hadoop-env.sh: > > export > HADOOP_CLASSPATH=$HADOOP_CLASSPATH:/usr/local/hadoop/hadoop-0.20.2/lib/ > > Same problem as before,this problem is killing me,because it has surrounded > me > for one month. > > >
