Hi Nick,
Thanks for your response. I am very new to Hadoop. I was trying to execute the "AggregateWordCount" example program provided by Hadoop in the distribution from the linux but was having the issue as stated in my earlier email. I have also tried executing the MultiFetch example with no success. If this example program needs the input file to be a sequence file. how should I create one, please advice? Thank You, Shravan Kumar. M Catalytic Software Ltd. [SEI-CMMI Level 5 Company] ----------------------------- This email and any files transmitted with it are confidential and intended solely for the use of the individual or entity to whom they are addressed. If you have received this email in error please notify the system administrator - <mailto:netopshelpd...@catalytic.com> netopshelpd...@catalytic.com _____ From: Nick Cen [mailto:cenyo...@gmail.com] Sent: Wednesday, June 17, 2009 6:50 PM To: core-user@hadoop.apache.org; shravan.mahank...@catalytic.com Subject: Re: not a SequenceFile? I guest you have set SequenceFileFormat as your inputformat in the configuration object, but the file you provide is not a sequence file. 2009/6/17 Shravan Mahankali <shravan.mahank...@catalytic.com> Hi Group, I have trouble running couple of examples provided by Hadoop. Below are the error messages I have from the console, could you please advise what could be the problem and probable solution? 09/06/17 16:30:29 INFO mapred.FileInputFormat: Total input paths to process : 1 09/06/17 16:30:29 INFO mapred.FileInputFormat: Total input paths to process : 1 09/06/17 16:30:29 INFO mapred.JobClient: Running job: job_200906171601_0009 09/06/17 16:30:30 INFO mapred.JobClient: map 0% reduce 0% 09/06/17 16:30:38 INFO mapred.JobClient: Task Id : attempt_200906171601_0009_m_000000_0, Status : FAILED java.io.IOException: hdfs://localhost:9000/user/root/words not a SequenceFile at org.apache.hadoop.io.SequenceFile$Reader.init(SequenceFile.java:1458) at org.apache.hadoop.io.SequenceFile$Reader.<init>(SequenceFile.java:1431) at org.apache.hadoop.io.SequenceFile$Reader.<init>(SequenceFile.java:1420) at org.apache.hadoop.io.SequenceFile$Reader.<init>(SequenceFile.java:1415) at org.apache.hadoop.mapred.SequenceFileRecordReader.<init>(SequenceFileRecordR eader.java:43) at org.apache.hadoop.mapred.SequenceFileInputFormat.getRecordReader(SequenceFil eInputFormat.java:54) at org.apache.hadoop.mapred.MapTask.run(MapTask.java:219) at org.apache.hadoop.mapred.TaskTracker$Child.main(TaskTracker.java:2198) 09/06/17 16:30:39 INFO mapred.JobClient: Task Id : attempt_200906171601_0009_r_000000_0, Status : FAILED java.lang.RuntimeException: java.lang.ClassNotFoundException: org.apache.hadoop.examples.AggregateWordCount$WordCountPlugInClass at org.apache.hadoop.mapred.lib.aggregate.UserDefinedValueAggregatorDescriptor. createInstance(UserDefinedValueAggregatorDescriptor.java:57) at org.apache.hadoop.mapred.lib.aggregate.UserDefinedValueAggregatorDescriptor. createAggregator(UserDefinedValueAggregatorDescriptor.java:64) at org.apache.hadoop.mapred.lib.aggregate.UserDefinedValueAggregatorDescriptor. <init>(UserDefinedValueAggregatorDescriptor.java:76) at org.apache.hadoop.mapred.lib.aggregate.ValueAggregatorJobBase.getValueAggreg atorDescriptor(ValueAggregatorJobBase.java:54) at org.apache.hadoop.mapred.lib.aggregate.ValueAggregatorJobBase.getAggregatorD escriptors(ValueAggregatorJobBase.java:65) at org.apache.hadoop.mapred.lib.aggregate.ValueAggregatorJobBase.initializeMySp ec(ValueAggregatorJobBase.java:74) at org.apache.hadoop.mapred.lib.aggregate.ValueAggregatorJobBase.configure(Valu eAggregatorJobBase.java:42) at org.apache.hadoop.util.ReflectionUtils.setConf(ReflectionUtils.java:58) at org.apache.hadoop.util.ReflectionUtils.newInstance(ReflectionUtils.java:82) at org.apache.hadoop.mapred.ReduceTask.run(ReduceTask.java:240) at org.apache.hadoop.mapred.TaskTracker$Child.main(TaskTracker.java:2198) Caused by: java.lang.ClassNotFoundException: org.apache.hadoop.examples.AggregateWordCount$WordCountPlugInClass at java.net.URLClassLoader$1.run(URLClassLoader.java:200) at java.security.AccessController.doPrivileged(Native Method) at java.net.URLClassLoader.findClass(URLClassLoader.java:188) at java.lang.ClassLoader.loadClass(ClassLoader.java:306) at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:268) at java.lang.ClassLoader.loadClass(ClassLoader.java:251) at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:319) at java.lang.Class.forName0(Native Method) at java.lang.Class.forName(Class.java:242) at org.apache.hadoop.mapred.lib.aggregate.UserDefinedValueAggregatorDescriptor. createInstance(UserDefinedValueAggregatorDescriptor.java:52) ... 10 more Thank You, Shravan Kumar. M Catalytic Software Ltd. [SEI-CMMI Level 5 Company] ----------------------------- This email and any files transmitted with it are confidential and intended solely for the use of the individual or entity to whom they are addressed. If you have received this email in error please notify the system administrator - <mailto:netopshelpd...@catalytic.com> netopshelpd...@catalytic.com -- http://daily.appspot.com/food/
