Hi, Ok, here's a bit of a bizarre issue...
How do you handle class collisions between Hadoop and your m/r job which calls other 3rd party classes. An example: Hadoop has an older version of an open source jar in its /lib directory. You're interfacing with a 3rd party OS tool that uses a later release of the same jar. You can modify the classpath, and that might work. But the better way is to create a Custom Class Loader. (Non-trivial) Looking at the Configuration class, it looks like there are a couple of methods that deal with loading a class in to the configuration so that the m/r jobs can have access to them on each node. Is this the correct intended use, or am I missing something? Has anyone done something like this? Thx -Mike Michael Segel Architect, R&D NAVTEQ 425 West Randolph Street Chicago, IL 60606 (T) +1 312-780-3432 (C) +1 312-952-8175 www.navteq.com<http://www.navteq.com/> The information contained in this communication may be CONFIDENTIAL and is intended only for the use of the recipient(s) named above. If you are not the intended recipient, you are hereby notified that any dissemination, distribution, or copying of this communication, or any of its contents, is strictly prohibited. If you have received this communication in error, please notify the sender and delete/destroy the original message and any copy of it from your computer or paper files.
