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-6346 Lustre <p>Trying to read a specific file (fort.1261) hangs from a client but is ok from other clients. I got debug trace from the client side fid <span class="error">&#91;0x20009104a:0x79c0:0x0&#93;</span></p> <p>I can upload the mds debug logs to the ftp site if needed.</p> LU-6346

reading a file for a client hangs but is ok from others clients

Bug Major Resolved Not a Bug Zhenyu Xu Mahmoud Hanafi Fri, 6 Mar 2015 18:41:00 +0000 Fri, 13 Mar 2015 16:43:08 +0000 Fri, 13 Mar 2015 16:43:08 +0000 Lustre 2.4.3 0 5 <p>uploaded mds debug to /uploads/LU6346/mdsdebug.out.gz</p> <p>Bobijam</p> <p>Could you please advise on this issue?</p> <p>Thanks</p> <p>Peter</p> <p>Do the other "ok" clients has the same lustre/kernel version as the problematic client?</p> <p>Can you get the stack trace of the hung process?</p> <p>it looks like a process is stuck trying to open the file </p> <div class="code panel" style="border-width: 1px;"><div class="codeContent panelContent"> <pre class="code-java">0]kdb&gt; btp 6718 Stack traceback <span class="code-keyword">for</span> pid 6718 0xffff8809acffc2c0 6718 63813 0 11 D 0xffff8809acffc930 read [&lt;ffffffff8147356b&gt;] thread_return+0x0/0x295 [&lt;ffffffff81475725&gt;] rwsem_down_failed_common+0xb5/0x160 [&lt;ffffffff81273e44&gt;] call_rwsem_down_read_failed+0x14/0x30 [&lt;ffffffff81474a1e&gt;] down_read+0xe/0x10 [&lt;ffffffffa0cc16cb&gt;] ll_glimpse_size+0x2b/0x70 [lustre] [&lt;ffffffffa0cc6b88&gt;] ll_inode_revalidate_it+0x198/0x1a0 [lustre] [&lt;ffffffffa0cc6bce&gt;] ll_getattr_it+0x3e/0x160 [lustre] [&lt;ffffffffa0cc6d1f&gt;] ll_getattr+0x2f/0x40 [lustre] [&lt;ffffffff81161dc7&gt;] vfs_fstat+0x37/0x60 [&lt;ffffffff81161e0f&gt;] sys_newfstat+0x1f/0x50 [&lt;ffffffff8147d792&gt;] system_call_fastpath+0x16/0x1b [&lt;00007fffed1a2d84&gt;] 0x7fffed1a2d84 </pre> </div></div> <p>and doing a ls -lr got stuck the same.</p> <div class="code panel" style="border-width: 1px;"><div class="codeContent panelContent"> <pre class="code-java">[0]kdb&gt; btp 65618 Stack traceback <span class="code-keyword">for</span> pid 65618 0xffff880937de6080 65618 62532 0 23 D 0xffff880937de66f0 ls [&lt;ffffffff8147356b&gt;] thread_return+0x0/0x295 [&lt;ffffffff81475725&gt;] rwsem_down_failed_common+0xb5/0x160 [&lt;ffffffff81273e44&gt;] call_rwsem_down_read_failed+0x14/0x30 [&lt;ffffffff81474a1e&gt;] down_read+0xe/0x10 [&lt;ffffffffa0cc16cb&gt;] ll_glimpse_size+0x2b/0x70 [lustre] [&lt;ffffffffa0cc6b88&gt;] ll_inode_revalidate_it+0x198/0x1a0 [lustre] [&lt;ffffffffa0cc6bce&gt;] ll_getattr_it+0x3e/0x160 [lustre] [&lt;ffffffffa0cc6d1f&gt;] ll_getattr+0x2f/0x40 [lustre] [&lt;ffffffff81161b77&gt;] vfs_fstatat+0x67/0xb0 [&lt;ffffffff81161c4f&gt;] sys_newlstat+0x1f/0x50 [&lt;ffffffff8147d792&gt;] system_call_fastpath+0x16/0x1b [&lt;00007fffece04df5&gt;] 0x7fffece04df5 </pre> </div></div> <p>Can you upload the backtrace of all processes? </p> <p>Found the issue. It was a single OST connective issue with the client. Please close this ticket.</p> <p>ok - thanks Mahmoud!</p> Development Rank 1|hzx7vr: Rank (Obsolete) 17763 Severity