[Bugs] [Bug 1165010] New: Regression TestFrameWork : Starting a process fails with "Port already in use" error in our regression test framework

[bugzilla at redhat.com]

https://bugzilla.redhat.com/show_bug.cgi?id=1165010

            Bug ID: 1165010
           Summary: Regression TestFrameWork : Starting a process fails
                    with "Port already in use" error in our regression
                    test framework
           Product: GlusterFS
           Version: mainline
         Component: glusterd
          Assignee: bugs at gluster.org
          Reporter: spandit at redhat.com
                CC: bugs at gluster.org, gluster-bugs at redhat.com



Description of problem:

The root cause is the way in which a new node is added to the cluster.

Now we have N1(127.1.1.1) and N2(127.1.1.2) as two nodes in the cluster, each
having a brick N1:B1 (127.1.1.1 : 49146) and N2:B2 (127.1.1.2 : 49147)

Now lets peer probe N3(127.1.1.3) from N1

1) Friend request is sent from N1 to N3. N3 added N1 in the peerinfo list i.e
N1 and its uuid say [UUID1]
2) N3 get the brick infos from N1
3) N3 tries to start the bricks
       1) N3 tries to start the brick B1 and find its not a local brick, using
the logic MY_UUID == brickinfuuid, which is false in this case,
          as the UUID of brickinfhostname (N1) is [UUID1] (as suggested by the
peerinfo list) and MY_UUID is [UUID3]. Hence doesn't start it.
       2) N3 tries to start the brick B2. Now the problem lies here. N3 uses
glusterd_resolve_brick() to resolve the UUID of B2->hostname(N2).
          In glusterd_resolve_brick(), it cannot find  N2 in the peerinfo list.
Then it checks if N2 is a local loop back address. Since N2(127.1.1.2) starts
with
          "127" it decides that its a local loop back address. Thus
glusterd_resolve_brick() fills brickinfuuid with [UUID3]. Now as brickinfuuid
== MY_UUID is
          true, N3 initiates the brick process B2 with -s 127.1.1.2 and
*-posix.glusterd-uuid=[UUID3]. This process dies off immediately, But for a
short amount of
          time it holds on to the  --brick-port, say for example 49155



Actual results:
Starting a process fails some of the times in our regression test framework


Expected results:


Additional info:

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