Hi Kumar, I assume you are referring to HADOOP-8192. I need to look at the code to see if the ordering matters but most likely it wouldn't. Thanks Devaraj On Mar 21, 2012, at 1:47 PM, Kumar Ravi wrote:
> > > Hello, > > We have been looking at IBM JDK junit failures on Hadoop-1.0.1 > independently and have ran into the same failures as reported in this JIRA. > I have a question based upon what I have observed below. > > We started debugging the problems in the testcase - > org.apache.hadoop.mapred.lib.TestCombineFileInputFormat > The testcase fails because the number of splits returned back from > CombineFileInputFormat.getSplits() is 1 when using IBM JDK whereas the > expected return value is 2. > > So far, we have found the reason for this difference in number of splits is > because the order in which elements in the nodeToBlocks hashmap get created > is in the reverse order that Sun JDK creates. > > The question I have at this point is -- Should there be a strict dependency > in the order in which the rackToBlocks hashmap gets populated, to determine > the number of splits that get should get created in a hadoop cluster? Is > this Working as designed? > > Regards, > Kumar > > > > Kumar Ravi > IBM Linux Technology Center
