RE: Error: java.lang.NullPointerException at java.util.concurrent.ConcurrentHashMap.get

2010-07-19 Thread Chinni, Ravi
The problem got fixed by using ip-address in all hadoop configuration files and also in /etc/hosts file. Anyway, thanks Ted. To partially answer your question - line ReduceTask.java:2683 is 'List loc = mapLocations.get(host);' From: Ted Yu [mailto:yuzhih...@gmail.com] Sent: Sunday, J

error when executing mapreduce program

2010-07-19 Thread Khaled BEN BAHRI
Hello :) I developped my first mapreduce program with eclipse. when i want to execute it i have this error i tried to solve it but i failed : Jul 19, 2010 5:06:37 PM org.apache.hadoop.mapred.JobClient monitorAndPrintJob INFO: Task Id : attempt_201007191410_0002_m_01_1, Status : FAILED jav