https://jira.whamcloud.com This file is an XML representation of an issue en-us 9.4.14 940014 05-12-2023 https://jira.whamcloud.com/browse/LU-17265 Lustre <p>This issue was created by maloo for Arshad &lt;arshad.hussain@aeoncomputing.com&gt;</p> <p>This issue relates to the following test suite run: <a href="https://testing.whamcloud.com/test_sets/873c927b-d963-40fa-830f-f3caea45a955" class="external-link" target="_blank" rel="nofollow noopener">https://testing.whamcloud.com/test_sets/873c927b-d963-40fa-830f-f3caea45a955</a></p> <p>test_39r failed with the following error:</p> <div class="preformatted panel" style="border-width: 1px;"><div class="preformattedContent panelContent"> <pre>atime on client 1699192823 != ost 0x65479ff6 </pre> </div></div> <p>Test session details:<br/> clients: <a href="https://build.whamcloud.com/job/lustre-reviews/100162" class="external-link" target="_blank" rel="nofollow noopener">https://build.whamcloud.com/job/lustre-reviews/100162</a> - 4.18.0-477.21.1.el8_8.aarch64<br/> servers: <a href="https://build.whamcloud.com/job/lustre-reviews/100162" class="external-link" target="_blank" rel="nofollow noopener">https://build.whamcloud.com/job/lustre-reviews/100162</a> - 4.18.0-477.21.1.el8_lustre.x86_64</p> <p>&lt;&lt;Please provide additional information about the failure here&gt;&gt;</p> <p>VVVVVVV DO NOT REMOVE LINES BELOW, Added by Maloo for auto-association VVVVVVV<br/> sanity test_39r - atime on client 1699192823 != ost 0x65479ff6</p> LU-17265

sanity test_39r: atime on client 1699192823 != ost 0x65479ff6

Bug Minor Resolved Fixed Arshad Hussain Maloo Mon, 6 Nov 2023 06:53:06 +0000 Wed, 20 Dec 2023 17:56:03 +0000 Wed, 29 Nov 2023 22:55:26 +0000 0 4 <p> </p> <div class="preformatted panel" style="border-width: 1px;"><div class="preformattedContent panelContent"> <pre>atime on client 1699192823 != ost 0x65479ff6</pre> </div></div> <p>Two obervations here:</p> <p> </p> <ul class="alternate" type="square"> <li>Compression is done between decimal vs hex. Which is not wrong. Maybe bringing it to same unit would not be wrong</li> </ul> <ul class="alternate" type="square"> <li>The drift is just  1 second. (Time on server is 1 second early than what was read on client)</li> </ul> <p>The comparisons are done within "$((...))" so there is hex-to-decimal conversion, but it is a bit confusing in the error message. </p> <p>Lustre should never be using the server timestamps when storing attributes on the servers. That avoids problems like NFS where the client gets tons of errors during a build when the client and server have different timestamps. </p> <p>That said, it seems possible that there is a race between when the client is <b>sending</b> the read RPCs for "dd" and when the client VFS updates the attributes on the local inode. We do not send another RPC to the OST to update the timestamps, so it might be a second outdated, but shouldn't be 10s outdated (ie. didn't get updated at all).</p> <p>So it seems the test should be lenient for a 1s (or 2s?) difference in the timestamps, and that will still achieve the goals of the test. </p> <p>Arshad, any chance you can push a fix for this, it should just be a one-line test script fix. </p> <p>Sure. I have assigned it to my name and thanks for explaination on the problem.</p> <p>"Arshad Hussain &lt;arshad.hussain@aeoncomputing.com&gt;" uploaded a new patch: <a href="https://review.whamcloud.com/c/fs/lustre-release/+/53035" class="external-link" target="_blank" rel="nofollow noopener">https://review.whamcloud.com/c/fs/lustre-release/+/53035</a><br/> Subject: <a href="https://jira.whamcloud.com/browse/LU-17265" title="sanity test_39r: atime on client 1699192823 != ost 0x65479ff6" class="issue-link" data-issue-key="LU-17265"><del>LU-17265</del></a> tests: Add 2s (leniency) in comparing timestamps<br/> Project: fs/lustre-release<br/> Branch: master<br/> Current Patch Set: 1<br/> Commit: a166c6aed4dc3b1114969d1b3eb8ce5ce26a4370</p> <p>"Oleg Drokin &lt;green@whamcloud.com&gt;" merged in patch <a href="https://review.whamcloud.com/c/fs/lustre-release/+/53035/" class="external-link" target="_blank" rel="nofollow noopener">https://review.whamcloud.com/c/fs/lustre-release/+/53035/</a><br/> Subject: <a href="https://jira.whamcloud.com/browse/LU-17265" title="sanity test_39r: atime on client 1699192823 != ost 0x65479ff6" class="issue-link" data-issue-key="LU-17265"><del>LU-17265</del></a> tests: allow margin for sanity/39r<br/> Project: fs/lustre-release<br/> Branch: master<br/> Current Patch Set: <br/> Commit: c5aa16db172afc9cbf0d4fd2c85261fef1a40d7b</p> <p>Landed for 2.16</p> Duplicate LU-16421 Related LU-13578 LU-14091 Development Rank 1|i040qn: Rank (Obsolete) 9223372036854775807 Severity