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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:Calibri">Hi Brian<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:Calibri"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:Calibri">This boils down to a network contention issue – that you are maxing out the network resources and GPFS is waiting.
<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:Calibri"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:Calibri">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.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:Calibri"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-family:Calibri">Bob Oesterlin<br>
Sr Principal Storage Engineer, Nuance<br>
<br>
<o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:Calibri"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:Calibri"><o:p> </o:p></span></p>
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<p class="MsoNormal"><b><span style="font-family:Calibri;color:black">From: </span>
</b><span style="font-family:Calibri;color:black"><gpfsug-discuss-bounces@spectrumscale.org> on behalf of Brian Marshall <mimarsh2@vt.edu><br>
<b>Reply-To: </b>gpfsug main discussion list <gpfsug-discuss@spectrumscale.org><br>
<b>Date: </b>Monday, December 5, 2016 at 10:01 AM<br>
<b>To: </b>gpfsug main discussion list <gpfsug-discuss@spectrumscale.org><br>
<b>Subject: </b>[EXTERNAL] [gpfsug-discuss] waiting for exclusive use of connection for sending msg<o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">Bob (and all), <o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">I see in this post that you were tracking down a problem I am currently seeing. Lots of waiters in deadlock with "<span style="font-family:"Helvetica Neue";color:#444444">waiting for exclusive use of connection for sending msg</span>".<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">Did you ever determine a fix / cause for that? I see your previous comments below. We are still on 4.2.0<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"><a href="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=">https://www.ibm.com/developerworks/community/forums/html/topic?id=c25e31ad-a2ae-408e-84e5-90f412806463</a><o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">Thanks,<o:p></o:p></p>
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<p class="MsoNormal">Brian<o:p></o:p></p>
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