This is a catch-all for issues running the channels and buffers tests in samevm mode in JPRT. It covers:

1. Many tests leave channels or selectors open, causing subsequent tests to fail because the process runs out of file descriptors or socket buffers.

2. Tests using memory-mapped files cannot run in samevm mode on Windows because the file mappings remain after the test has completed.

3. A couple of tests use Runtime.exec to run a second VM assuming the current working directory contains the test classes.

4. Not strictly samevm related but the adapter tests makes assumptions on how it takes to connect or receive packets from some hosts. These timeouts make the tests too fragile when running in JPRT.

5. The FileChannel/Transfer.java runs with a timeout that is insufficient for Windows when running in JPRT.

6. Several tests need to be "dialed-down" so that they consume less resources and run quicker. Many of the Selector tests are actually mini-stress tests.