Discussion:
LDM KILLING A SUN
Rawlings, Bill A
2008-08-19 15:13:49 UTC
Permalink
You guys have to excuse me, I've been working with Jini for 9 years, but
it's been 99% JavaSpace work, I'm very unfamiliar with the LUS and the
associated services.



We have an instance where the services use the LDM
(LookupDiscoveryManager). Running three services, the CPU on a big SUN
machine locks up at 100% utilization and never comes back. It appears
that it is the LDM used by these services that is causing this run on
the CPU.



My initial feeling is that since this is strictly a Unicast discovery
environment, we don't even need the LDM, but any ideas on why three
instances are killing a good sized machine?



BAR




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Bob Scheifler
2008-08-19 15:30:34 UTC
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Post by Rawlings, Bill A
Running three services, the CPU on a big SUN
machine locks up at 100% utilization and never comes back.
Have you tried getting some thread dumps?

- Bob

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Rawlings, Bill A
2008-08-19 15:50:55 UTC
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Not specifically. This is at a deployment site, and the guy who's
running the tests just isolated it to three instances of the LDM, the
services are doing nothing but sitting there. He says the three LDM's
are all that is active. All that is running is the LUS, the TM, and a
space. The three services are doing no work at all, no entries in the
space and no pending transactons and the CPU pegs at 100 and stays
there.

-----Original Message-----
From: ***@Sun.COM [mailto:***@Sun.COM]
Sent: Tuesday, August 19, 2008 8:31 AM
To: Rawlings, Bill A
Cc: JINI-***@JAVA.SUN.COM
Subject: Re: LDM KILLING A SUN
Post by Rawlings, Bill A
Running three services, the CPU on a big SUN
machine locks up at 100% utilization and never comes back.
Have you tried getting some thread dumps?

- Bob

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Bob Scheifler
2008-08-19 16:40:37 UTC
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Post by Rawlings, Bill A
Not specifically. This is at a deployment site, and the guy who's
running the tests just isolated it to three instances of the LDM, the
services are doing nothing but sitting there.
Probably hard to diagnose anything without seeing what's going
on inside the processes (thread dumps, truss, profiling, something).

- Bob

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