<html>#2234: trouble in the tutorial server
<table style='border-spacing: 1ex 0pt; '>
<tr><td style='text-align:right'> Reporter:</td><td>Bill Gabella</td></tr>
<tr><td style='text-align:right'> Status:</td><td>open</td></tr>
<tr><td style='text-align:right'>Milestone:</td><td>ET_2019_02</td></tr>
<tr><td style='text-align:right'> Version:</td><td></td></tr>
<tr><td style='text-align:right'> Type:</td><td>bug</td></tr>
<tr><td style='text-align:right'> Priority:</td><td>major</td></tr>
<tr><td style='text-align:right'>Component:</td><td>Other</td></tr>
</table>
<p>Comment (by Roland Haas):</p>
<p>More issues. I am now getting error message like this</p>
<div class="codehilite"><pre><span></span>[ekohaes8:26785] Read -1, expected 313632, errno = 1
</pre></div>
<p>by the hundreds (this is using Ubuntu 18.04 rather than 16.04 so may only happen for new versions of OpenMPI. The OpenMPI ticke referenced below mentions this to happen on at least OpenMPI 4.0 and 3.1.3). This is apparently known: <a href="https://github.com/open-mpi/ompi/issues/4948" rel="nofollow" class="ap-connect-link">https://github.com/open-mpi/ompi/issues/4948</a> with the workaround being to set an env variables (or setting in the .conf file in $HOME):</p>
<div class="codehilite"><pre><span></span>export OMPI_MCA_btl_vader_single_copy_mechanism=none
</pre></div>
<p>This can also depend on the docker version used it would seem as <code>docker run --cap-add=SYS_PTRACE ...</code> is offered as a host-side workaround.</p>
<p>--<br/>
Ticket URL: <a href='https://bitbucket.org/einsteintoolkit/tickets/issues/2234/trouble-in-the-tutorial-server'>https://bitbucket.org/einsteintoolkit/tickets/issues/2234/trouble-in-the-tutorial-server</a></p>
</html>