Aaron Kimball wrote:
I'm not aware of any documentation about this particular use case for
Hadoop. I think your best bet is to look into the JNI documentation about
loading native libraries, and go from there.
- Aaron

You could also try

1. Starting the main processing app as a process on the machines -and leave it running-

2. have your mapper (somehow) talk to that running process, passing in parameters (including local filesystem filenames) to read and write.

You can use RMI or other IPC mechanisms to talk to the long-lived process.

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