Can you try this ? Pick a class like WordCount from your package and execute this command:
javap -classpath <path to your jar> -verbose org.myorg.Wordcount | grep version. For e.g. here's what I get for my class: $ javap -verbose WCMapper | grep version minor version: 0 major version: 50 Please paste the output of this - we can verify what the problem is. Thanks Hemanth On Sat, Feb 23, 2013 at 4:45 PM, Fatih Haltas <fatih.hal...@nyu.edu> wrote: > Hi again, > > Thanks for your help but now, I am struggling with the same problem on a > machine. As the preivous problem, I just decrease the Java version by Java > 6, but this time I could not solve the problem. > > those are outputs that may explain the situation: > > --------------------------------------------------------------------------------------------------------------------------------------------- > 1. I could not run my own code, to check the system I just tried to run > basic wordcount example without any modification, except package info. > ************************************************** > COMMAND EXECUTED: hadoop jar my.jar org.myorg.WordCount NetFlow NetFlow.out > Warning: $HADOOP_HOME is deprecated. > > Exception in thread "main" java.lang.UnsupportedClassVersionError: > org/myorg/WordCount : Unsupported major.minor version 51.0 > at java.lang.ClassLoader.defineClass1(Native Method) > at java.lang.ClassLoader.defineClass(ClassLoader.java:634) > at > java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142) > at java.net.URLClassLoader.defineClass(URLClassLoader.java:277) > at java.net.URLClassLoader.access$000(URLClassLoader.java:73) > at java.net.URLClassLoader$1.run(URLClassLoader.java:212) > at java.security.AccessController.doPrivileged(Native Method) > at java.net.URLClassLoader.findClass(URLClassLoader.java:205) > at java.lang.ClassLoader.loadClass(ClassLoader.java:321) > at java.lang.ClassLoader.loadClass(ClassLoader.java:266) > at java.lang.Class.forName0(Native Method) > at java.lang.Class.forName(Class.java:266) > at org.apache.hadoop.util.RunJar.main(RunJar.java:149) > > ************************************************************************************** > 2. Java version: > ******************************** > COMMAND EXECUTED: java -version > java version "1.6.0_24" > OpenJDK Runtime Environment (IcedTea6 1.11.6) > (rhel-1.33.1.11.6.el5_9-x86_64) > OpenJDK 64-Bit Server VM (build 20.0-b12, mixed mode) > ********************************** > 3. JAVA_HOME variable: > ********************************** > COMMAND EXECUTED: echo $JAVA_HOME > /usr/lib/jvm/jre-1.6.0-openjdk.x86_64 > ******************************************** > 4. HADOOP version: > ******************************************* > COMMAND EXECUTED: hadoop version > Warning: $HADOOP_HOME is deprecated. > > Hadoop 1.0.4 > Subversion > https://svn.apache.org/repos/asf/hadoop/common/branches/branch-1.0 -r > 1393290 > Compiled by hortonfo on Wed Oct 3 05:13:58 UTC 2012 > From source with checksum fe2baea87c4c81a2c505767f3f9b71f4 > ******************************************************** > > Are these still incompatible with eachother? (Hadoop version and java > version) > > > Thank you very much. > > > On Tue, Feb 19, 2013 at 10:26 PM, Fatih Haltas <fatih.hal...@nyu.edu>wrote: > >> Thank you all very much >> >> 19 Şubat 2013 Salı tarihinde Harsh J adlı kullanıcı şöyle yazdı: >> >>> Oops. I just noticed Hemanth has been answering on a dupe thread as >>> well. Lets drop this thread and carry on there :) >>> >>> On Tue, Feb 19, 2013 at 11:14 PM, Harsh J <ha...@cloudera.com> wrote: >>> > Hi, >>> > >>> > The new error usually happens if you compile using Java 7 and try to >>> > run via Java 6 (for example). That is, an incompatibility in the >>> > runtimes for the binary artifact produced. >>> > >>> > On Tue, Feb 19, 2013 at 10:09 PM, Fatih Haltas <fatih.hal...@nyu.edu> >>> wrote: >>> >> Thank you very much Harsh, >>> >> >>> >> Now, as I promised earlier I am much obliged to you. >>> >> >>> >> But, now I solved that problem by just changing the directories then >>> again >>> >> creating a jar file of org. but I am getting this error: >>> >> >>> >> 1.) What I got >>> >> >>> ------------------------------------------------------------------------------ >>> >> [hadoop@ADUAE042-LAP-V flowclasses_18_02]$ hadoop jar flow19028pm.jar >>> >> org.myorg.MapReduce /home/hadoop/project/hadoop-data/NetFlow 19_02.out >>> >> Warning: $HADOOP_HOME is deprecated. >>> >> >>> >> Exception in thread "main" java.lang.UnsupportedClassVersionError: >>> >> org/myorg/MapReduce : Unsupported major.minor version 51.0 >>> >> at java.lang.ClassLoader.defineClass1(Native Method) >>> >> at java.lang.ClassLoader.defineClass(ClassLoader.java:634) >>> >> at >>> >> >>> java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142) >>> >> at >>> java.net.URLClassLoader.defineClass(URLClassLoader.java:277) >>> >> at java.net.URLClassLoader.access$000(URLClassLoader.java:73) >>> >> at java.net.URLClassLoader$1.run(URLClassLoader.java:212) >>> >> at java.security.AccessController.doPrivileged(Native Method) >>> >> at java.net.URLClassLoader.findClass(URLClassLoader.java:205) >>> >> at java.lang.ClassLoader.loadClass(ClassLoader.java:321) >>> >> at java.lang.ClassLoader.loadClass(ClassLoader.java:266) >>> >> at java.lang.Class.forName0(Native Method) >>> >> at java.lang.Class.forName(Class.java:266) >>> >> at org.apache.hadoop.util.RunJar.main(RunJar.java:149) >>> >> >>> >> 2.) How I create my jar >>> >> >>> ------------------------------------------------------------------------------------- >>> >> [hadoop@ADUAE042-LAP-V flowclasses_18_02]$ jar cvf flow19028pm.jar >>> org >>> >> added manifest >>> >> adding: org/(in = 0) (out= 0)(stored 0%) >>> >> adding: org/myorg/(in = 0) (out= 0)(stored 0%) >>> >> adding: org/myorg/MapReduce$FlowPortReducer.class(in = 1661) (out= >>> >> 690)(deflated 58%) >>> >> adding: org/myorg/MapReduce.class(in = 1587) (out= 903)(deflated 43%) >>> >> adding: org/myorg/MapReduce$FlowPortMapper.class(in = 1874) (out= >>> >> 823)(deflated 56%) >>> >> >>> >> 3.) Content of my jar file >>> >> >>> --------------------------------------------------------------------------------------- >>> >> [hadoop@ADUAE042-LAP-V flowclasses_18_02]$ jar tf flow19028pm.jar >>> >> META-INF/ >>> >> META-INF/MANIFEST.MF >>> >> org/ >>> >> org/myorg/ >>> >> org/myorg/MapReduce$FlowPortReducer.class >>> >> org/myorg/MapReduce.class >>> >> org/myorg/MapReduce$FlowPortMapper.class >>> >> >>> ----------------------------------------------------------------------------------------- >>> >> >>> >> >>> >> Thank you very much. >>> >> >>> >> >>> >> On Tue, Feb 19, 2013 at 8:20 PM, Harsh J <ha...@cloudera.com> wrote: >>> >>> >>> >>> Your point (4) explains the problem. The jar packed structure should >>> >>> look like the below, and not how it is presently (one extra top level >>> >>> dir is present): >>> >>> >>> >>> META-INF/ >>> >>> META-INF/MANIFEST.MF >>> >>> org/ >>> >>> org/myorg/ >>> >>> org/myorg/WordCount.class >>> >>> org/myorg/WordCount$TokenizerMapper.class >>> >>> org/myorg/WordCount$IntSumReducer.clas-- >>> Harsh J >>> >> >
