This is good news!
I found SureLogic stack useful for finding bugs.
It was especially helpful in detecting synchronization issues.
Good that the licensing issues are cleared out.
Thanks, Cos.
--Konstantin
On 5/14/2010 12:59 PM, Konstantin Boudnik wrote:
Here's an update from SureLogic on the licensing of the software to the
broader contributors community.
1) For now we should be able to use 'committers' license (the one we already
have)
to share with contributors on per case basis (a contributor needs to ask
for it and after
a consideration by a designated committer it can be send our to the
requester)
2) in the future i.e. past 10/31/2010 when the current license will expire and
be updated, we'll provide a POC so that our contributors can ask for a
license to be given to them (similar to #1 above).
Right now, SureLogic works on license auto-update feature where new license
will be automatically retrieved by the tools upon the expiration of an old
one. Thus #2) will be moving to that "self-renewing" license mechanism to
avoid having to pass out new licenses each year.
So, I think this all seems very reasonable and we can effectively close the
'license' issue.
On the other hand, I got the word that CLI interfaces for their tools are in
the testing phase right now, so we should be able to try them out shortly.
Do we have any other concerns at this point?
Cos
On Mon, May 10, 2010 at 04:37PM, Konstantin Boudnik wrote:
This is very valid concern Todd. I am talking with SureLogic at the moment to
find out if they will be willing to provide the license to all Hadoop
contributors.
On the other hand not including such type of validation into standard patch
validation process poses a danger of code degradation as time passes. E.g. we
can add SureLogic validation into secondary build but then Hadoop committers
will have to make sure that no new SureLogic's warnings were added in the
last week or so and fix them immediately or at least open a JIRA to track such
issues. Certainly there some other ways.
I believe we might need to make an effort here to help SureLogic to limit the
distribution of the license by Hadoop contributors crowd. I am not sure if this
is
Ok to ask contributors to fill some kind of legal form where they agree not to
use the copy of the license for any projects not hosted by ASF or something?
Similar to what we fill for our the contributions to ASF? But first let's hear
SureLogic take on the license ;)
Cos
On Fri, May 07, 2010 at 04:35PM, Todd Lipcon wrote:
Hi Cos,
This looks great, and I'm excited to have more ways of finding these tricky
bugs. Are there any examples of bugs found already by these techniques?
The one concern I have about the proposal is with this:
SureLogic analysis is going to be included to the test-patch process. This
said new patches are required not to raise SureLogic warnings level (similar
to the requirements about FindBugs or javac).
This is slightly worrisome since the SureLogic license is only available to
committers. For non-committers, I think this may prove to be difficult since
they won't have any local means of checking for warnings and verifying that
they've fixed them.
Thanks
-Todd
2010/5/5 Konstantin Boudnik<c...@yahoo-inc.com>
Hello.
As some of you might know we have the license for great concurrency
analysis
software from SureLogic.
SureLogic engineers gave some run for HDFS, MR, and Zookeeper code at the
end
of last year. The tools seem very promising and supposedly bring us the
value (linked from the page below).
Please read this Wiki page to get more information about the tool and to
get some understanding how it works
http://wiki.apache.org/hadoop/HowToUseConcurrencyAnalysisTools
Here's the additional information on how to install/upgrade to the latest
release: http://surelogic.com/static/eclipse/install.html
There's also a couple of JIRAs w/ patches (HDFS-801, MAPREDUCE-1259) to
integrate annotations into our current source code base. The annotations
are
represented as a jar file with some interface classes. They are
redistributed
under Apache license. The retention policy of annotations are 'compile
time',
i.e. this jar isn't required for the runtime of Hadoop.
It'd be great to hear community thoughts on this so we can make some
decision
about this toolset.
Please comment. Thanks
Cos
--
Todd Lipcon
Software Engineer, Cloudera
