PIG-2405: some unit test case failed with open JDK
Review Request #7898 - Created Nov. 6, 2012 and updated
For PIG-2405, fix 3 UTs:TestDataModel, TestMRCompiler, and TestPruneColumn
The 3 UTs passed in both sun and opensource JDK. test-commit passed. test-patch failed, but the failure isn't introduced by the patch. There are [javadoc] 38 warnings in original trunk branch.[PIG-3033] [exec] -1 overall. [exec] [exec] +1 @author. The patch does not contain any @author tags. [exec] [exec] +1 tests included. The patch appears to include 12 new or modified tests. [exec] [exec] -1 javadoc. The javadoc tool appears to have generated 1 warning messages. [exec] [exec] +1 javac. The applied patch does not increase the total number of javac compiler warnings. [exec] [exec] +1 findbugs. The patch does not introduce any new Findbugs warnings. [exec] [exec] +1 release audit. The applied patch does not increase the total number of release audit warnings.