On Thu, Oct 6, 2016, at 11:06, Mike Drob wrote: > Devs, > > Is it possible to use HTrace 3 & 4 together to get combined traces?
Unfortunately, it's currently not possible. > If I'm > developing an application that will use the latest and greatest from > HTrace > 4, but I'm tied to an older version of Hadoop that runs HTrace 3, then > what > does this integration need to look like? It is definitely a problem that the latest Apache version of Hadoop still uses HTrace 3.x. We've been waiting for the Hadoop 2.8 release for a while, to try to resolve this issue. I wonder if it we could try to backport HTrace 4.x to 2.6 or 2.7? One thing to keep in mind is that the HTrace 3.x code in Hadoop 2.6 and earlier was not fully baked-- you have to wait until the 2.8 release to get that. > I've been trying to wire them up > together, but have not had any success so far. Hmm. This would be a challenge. A lot of things changed-- the size of IDs, how libraries were handled, etc. Cheers, Colin > > Thanks, > Mike
