[Bugs] [Bug 1365879] New: [libgfchangelog]: If changelogs are not available for the requested time range, no proper error message

[bugzilla at redhat.com]

https://bugzilla.redhat.com/show_bug.cgi?id=1365879

            Bug ID: 1365879
           Summary: [libgfchangelog]: If changelogs are not available for
                    the requested time range, no proper error message
           Product: GlusterFS
           Version: 3.8.0
         Component: changelog
          Assignee: bugs at gluster.org
          Reporter: khiremat at redhat.com
                CC: avishwan at redhat.com, bugs at gluster.org
        Depends On: 1362151, 1365877
            Blocks: 1364422



+++ This bug was initially created as a clone of Bug #1365877 +++

Description of problem:

 If changelogs are not available for the requested time range, no proper error
message is displayed. It just fails. If start time is less than min changelog
available time, then history changelog fails with -1 as any failure and no
error message is printed. Distinguishing this error will be helpful for 
the consumers to act upon it.

For example, geo-replication upon receiving this error would fallback to
xsync. 

Version-Release number of selected component (if applicable):
mainline

How reproducible:
Always

Steps to Reproduce: (For simplicity consider plain distribute setup)
This is not simple to reproduce. It might hit during replace brick scencarios.
1. Setup geo-rep between master and slave
2. Before geo-rep syncs all data from master to slave, replace the brick from
   master and write new data on master.
3. Now the replaced brick's min changelog available is much later than the
   stime (sync time) corresponding to this brick.
4. When geo-rep is started after replace brick, it would hit above case.


Actual results:
When start time is less than min available changelog, histor fails with -1 and
error is not logged.

Expected results:
It should distinguish the above error, log it and fail.


Referenced Bugs:

https://bugzilla.redhat.com/show_bug.cgi?id=1362151
[Bug 1362151] [libgfchangelog]: If changelogs are not available for the
requested time range, no proper error message
https://bugzilla.redhat.com/show_bug.cgi?id=1364422
[Bug 1364422] [libgfchangelog]: If changelogs are not available for the
requested time range, no distinguished error
https://bugzilla.redhat.com/show_bug.cgi?id=1365877
[Bug 1365877] [libgfchangelog]: If changelogs are not available for the
requested time range, no proper error message
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