Thanks for confirmation. So if a new executor is launched, the callback sequence will be 1. registered. 2. launchTask.
Guodong On Wed, Jun 5, 2013 at 2:51 AM, Vinod Kone <[email protected]> wrote: > if there is already a running executor with the given executor id, the > slave sends the task to the executor. otherwise, it will launch a new > executor and then send the task to it. > > > On Tue, Jun 4, 2013 at 1:56 AM, 王国栋 <[email protected]> wrote: > > > Hi guys, > > > > I find that spark only launches one mesos-executor on each slave node. > But > > hadoop will launch multiple tasktrackers on each slave node as long as > > resource is enough. > > > > I goes through the spark code. But I have some questions. > > when the scheduler launch mesos tasks, slave checks the executor info > which > > is given by scheduler. If 1. there is no executor with the given > > executorID, what will slave do? > > 2. if there is executor with the given executorID, what will slave do? > > > > I am doing some test to try to understand the detailed process of this. > > Especially the callback sequences on MesosExecutor. > > > > Can anybody explain this to me? I am looking forward to the discussion. > > > > Thanks. > > > > > > Guodong > > >
