[IPython-dev] ipcluster(LSF): some engines do not start

MinRK benjaminrk@gmail....
Sat Aug 24 02:03:44 CDT 2013


This is a bug, but it is a consequence of the connection file not existing
when the engine starts. It suggests your engines are starting too early.


On Fri, Aug 23, 2013 at 5:24 PM, Florian M. Wagner <wagnerfl@student.ethz.ch
> wrote:

>  Dear all,
>
> I am starting an IPython Cluster using LSF. Sometimes all engines startup
> as expected, other times a few engines are missing. So it might depend on
> the clusters load? The ipengine error logs yield:
>
> 2013-08-23 16:58:27.855 [IPEngineApp] Using existing profile dir:
> u'/cluster/home02/erdw/wagnerfl/.ipython/profile_cluster'
> 2013-08-23 16:58:27.881 [IPEngineApp] ERROR | Couldn't start the Engine
> Traceback (most recent call last):
>   File
> "/cluster/home02/erdw/wagnerfl/.local/lib64/python2.7/site-packages/IPython/parallel/apps/ipengineapp.py",
> line 342, in init_engine
>     connection_info=self.connection_info,
> AttributeError: 'IPEngineApp' object has no attribute 'connection_info'
>
>  Other engines are interrupted after missing four heartbeats (3010 ms).
>
> My changes from the default settings are:
>
> c.IPClusterStart.delay = 5.0
> c.IPClusterStart.early_shutdown = 90
> c.IPEngineApp.wait_for_url_file = 60
> c.EngineFactory.timeout = 20
>
> Anything else you would recommend to tweak?
>
> Thank you!
> Florian
>
>
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>
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>
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>
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