<html>#1609: CarpetIOHDF5 incorrectly recovers grid scalars and arrays with DISTRIB=CONSTANT
<table style='border-spacing: 1ex 0pt; '>
<tr><td style='text-align:right'> Reporter:</td><td>Roland Haas</td></tr>
<tr><td style='text-align:right'> Status:</td><td>resolved</td></tr>
<tr><td style='text-align:right'>Milestone:</td><td></td></tr>
<tr><td style='text-align:right'> Version:</td><td>development version</td></tr>
<tr><td style='text-align:right'> Type:</td><td>bug</td></tr>
<tr><td style='text-align:right'> Priority:</td><td>minor</td></tr>
<tr><td style='text-align:right'>Component:</td><td>Carpet</td></tr>
</table>
<p>Changes (by Roland Haas):</p>
<p><table>
<tr><td>status:</td><td>resolved (was open)</td></tr>
</table></p>
<p>Due to the way that grid variables with DISTRIB=constant are handled, a recent change to Carpet (which is required to run on larger core counts) caused these variables to not be correctly recovered (the change was to add a new dimension rather than extend an existing one).</p>
<p>There were two things missing: grid scalars are handled as zero dimensional arrays in the flesh but as 1d arrays with 1 element in the driver, restoring variables (arrays or scalars) did not take the new way of handling DISTRIB=constant into account. </p>
<p>Since I have already committed fixes before and now have fixes for the fixes (sorry), it would be good if someone was to review them.</p>
<p>The typical failure mode is that grid scalars/arrays are not fully recovered which in the case of grid scalars is silent (since the whole variable is missing which we silently ignore) leaving them with undefined values.</p>
<p><strong>Keyword:</strong></p>
<p>Comment (by Roland Haas):</p>
<p>6 years an no recurrence of this seems to make the test case not that important.</p>
<p>--<br/>
Ticket URL: <a href='https://bitbucket.org/einsteintoolkit/tickets/issues/1609/carpetiohdf5-incorrectly-recovers-grid'>https://bitbucket.org/einsteintoolkit/tickets/issues/1609/carpetiohdf5-incorrectly-recovers-grid</a></p>
</html>