> ----------------Start of the message:
> > I would like Hairong to consider if she could fix the issue in 0.20
> > without the incompatible change.
> It is possible that I fix the issue in 0.20 without breaking the
> compatibility. But I am worried about the code stability if we take
> this approach. The pipeline code is such a critical and fragile part
> of HDFS. Currently I depend on the extensive pipeline fault
> injection tests created in 0.21 to build the confidence that my
> change works. If the change in 0.20 differs from that in 0.21 and
> the trunk, it becomes harder for us to ensure the pipeline code
> I would like to propose that we pull out HDFS-793 and HDFS-101 from
+1 to pull it out.
This part of the code is trick to get right and test.