Folks,
Hadoop 0.19.1 is now available with the file append feature disabled.
It's time to talk about a Hadoop 0.20.0 release.
Hadoop 0.20.0 feature freeze date was almost 3 months ago. The last
few blockers are now almost fixed (should be next week) except for
HADOOP-4379. HADOOP-4379 is work that is needed to properly implement
file append.
*** I propose we move HADOOP-4379 off to release 0.21.0 and apply the
same disabling of file append in Hadoop 0.20.0 that we put in place to
get 0.19.1 released (HADOOP-5224 and HADOOP-5225).
I will call a vote for 0.20.0 when blockers are fixed.
Cheers,
Nigel
Folks,
Some Hadoop deployments have upgraded to 0.19.0. Clearly, the 0.19
branch has issues and a 0.19.1 release is needed.
Quality issues in the changes made for the file append feature have
prevented some from deploying Hadoop 0.19. One of these changes
(sync) has now been "fixed" by reducing its semantics in Hadoop
0.18.3 (HADOOP-4997). This was necessary to stabilize the 0.18
branch.
I would like to propose that we apply this same "fix" to sync in
0.19.1 and 0.20.0. Since append requires the full semantics of
sync, I propose we also disable append (perhaps throw
UnsupportedOperationException from API?). Yes, this would
unfortunately be an incompatible change between 0.19.0 and 0.19.1.
We can then take the time needed to fix append properly in 0.21.0.
I will call a vote for 0.19.1 and 0.20.0 when blockers are fixed.
Nigel
