Hi Albert, There has been a critical bug in 0.7 release. The bug and the patch are avalaible at https://issues.apache.org/jira/browse/HADOOP-607. There should be a release soon fixing this problem.
Regards Mahadev > -----Original Message----- > From: Albert Chern [mailto:[EMAIL PROTECTED] > Sent: Thursday, October 12, 2006 7:44 PM > To: [email protected] > Subject: Classes Not Loading Correctly in MapRed 0.7 > > Hello, > > After upgrading from 0.6 to 0.7, we have experienced a strange error > with MapReduce jobs. Jobs that ran perfectly before now seem to have > trouble finding the classes from our code. The stack trace is long, > but the errors happen in MapTask.run() when it tries to get the map > output key class from the JobConf, which is probably the first time > any of our classes are loaded. Then it fails with a > ClassNotFoundException. > > The strange thing is, the error does not occur on all of the machines > in the cluster. As far as we can tell, the Hadoop installation and > configuration are the same across the machines. Downgrading to 0.6 > fixes the problem. Has anyone experienced something similar, or have > any idea what could be causing this problem? Something incorrectly > configured, maybe? > > Thanks, > Albert
