Khaled's Discussions

Error when excuting mapreduce

hello to alli am writing a mapreduce program, but i want to execute it it gives this errorJul 19, 2010 5:06:31 PM org.apache.hadoop.mapred.JobClient monitorAndPrintJobINFO: Task Id :…Continue

Tags: hadoop, mapreduce

Started Jul 20, 2010

starting hadoop daemons
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when i type this command to start the hadoop daemons : bin/start-all.shit make an error and say that JAVA_HOME is not seti set java_home at bash_profile but it doesn't workplease can any one help me??Continue

Started this discussion. Last reply by Marcos Ortiz Valmaseda Aug 12, 2010.

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Marcos Ortiz Valmaseda replied to Khaled's discussion 'starting hadoop daemons'

Remembe that you should execute that on the bash profile on the same user that will execute the Hadoop daemons. Regards

Aug 12, 2010

Anantha Srivathsa N replied to Khaled's discussion 'starting hadoop daemons'

Hi Khaled, Did you edit the contents in the file hadoop-env.sh? We need to set the environmental variables here and execute the file. Then your Hadoop works. This file must be modified as it clearly states the mandatory changes. Please let me know…

Jul 28, 2010

Error when excuting mapreduce

hello to alli am writing a mapreduce program, but i want to execute it it gives this errorJul 19, 2010 5:06:31 PM org.apache.hadoop.mapred.JobClient monitorAndPrintJobINFO: Task Id : attempt_201007191410_0002_m_000000_0, Status : FAILEDjava.lang.NullPointerException at org.apache.hadoop.io.serializer.SerializationFactory.getSerializer(SerializationFactory.java:73) at org.apache.hadoop.mapred.MapTask$MapOutputBuffer.<init>(MapTask.java:797) at…See More

Discussion posted by Khaled Jul 20, 2010

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