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

Florian M. Wagner wagnerfl at student.ethz.ch
Fri Aug 23 11:24:39 EDT 2013

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:
    2013-08-23 16:58:27.881 [IPEngineApp] ERROR | Couldn't start the Engine
    Traceback (most recent call last):
    line 342, in init_engine
    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!

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