[gpfsug-discuss] waiting for exclusive use of connection for sending msg

[Oesterlin, Robert]

Hi Brian

This boils down to a network contention issue – that you are maxing out the network resources and GPFS is waiting.

Now- digging deeper into why, that’s a larger issue. I’m still struggling with this myself. It takes a lot of digging into network stats, utilization, dropped packets, etc. It could be at the server/client or elsewhere in the network.

Bob Oesterlin
Sr Principal Storage Engineer, Nuance




From: <gpfsug-discuss-bounces at spectrumscale.org> on behalf of Brian Marshall <mimarsh2 at vt.edu>
Reply-To: gpfsug main discussion list <gpfsug-discuss at spectrumscale.org>
Date: Monday, December 5, 2016 at 10:01 AM
To: gpfsug main discussion list <gpfsug-discuss at spectrumscale.org>
Subject: [EXTERNAL] [gpfsug-discuss] waiting for exclusive use of connection for sending msg

Bob (and all),

I see in this post that you were tracking down a problem I am currently seeing.  Lots of waiters in deadlock with "waiting for exclusive use of connection for sending msg".

Did you ever determine a fix / cause for that?   I see your previous comments below.  We are still on 4.2.0

https://www.ibm.com/developerworks/community/forums/html/topic?id=c25e31ad-a2ae-408e-84e5-90f412806463<https://urldefense.proofpoint.com/v2/url?u=https-3A__www.ibm.com_developerworks_community_forums_html_topic-3Fid-3Dc25e31ad-2Da2ae-2D408e-2D84e5-2D90f412806463&d=DgMFaQ&c=djjh8EKwHtOepW4Bjau0lKhLlu-DxM1dlgP0rrLsOzY&r=LPDewt1Z4o9eKc86MXmhqX-45Cz1yz1ylYELF9olLKU&m=m-3oyYl8Sy9SrtXMVezKHBNvDiTeoCUnP5IlTxJtPbo&s=vtiuydi5xKAWDcNAvtqBL44rhjy1lXnPZG8RIa8KYD8&e=>


Thanks,
Brian
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