While verifying 6992841 I noticed that the necessary new testname is missing from the 5.0u27-b01 source archive:

nightsvr $ ls /net/koori.sfbay/onestop/jdk/5.0u27/promoted/fcs/b01/j4b/ws/j2se/test/sun/nio/ch
Basic.java SelProvider.java TempBuffer.java
nightsvr $

It is present in the revision it synced from:
nightsvr $ ls /net/koori.sfbay/onestop/jdk/5.0u26/promoted/rev/b04/j4b/ws/j2se/test/sun/nio/ch
6645197.java Basic.java ClosedSelectorTest.java SelProvider.java TempBuffer.java
nightsvr $


ClosedSelectorTest.java is missing from 5.0u27-b01 source.
Note: As per 6992841, 6645197.java is supposed to be missing now