This error is caused by older versions of Hadoop distributions shipping with a very old version of Jackson JSON parser. This issue was tracked via HADOOP-7470 and fixed in Hadoop 1.0.1. Therefore if you're using a Hadoop version older than 1.0.1 you are very likely to run into this problem as well. Hadoop 1.0.1 shipped on Feb 2012, and we strongly recommend that you upgrade your deployment to a more recent version.
If upgrading is not an option, then you can fix this issue by following these steps: