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-1093 Lustre <p>We had one occurence of this bug on a classified Lustre 2.1 OSS. Timeframe coincided with <a href="https://jira.whamcloud.com/browse/LU-1085" title="ASSERTION(cfs_atomic_read(&amp;exp-&gt;exp_refcount) == 0) failed" class="issue-link" data-issue-key="LU-1085"><del>LU-1085</del></a>. Like the other bugs in that window, this crash was preceded by hundreds of messages like:</p> <p>LustreError: 14210:0:(genops.c:1270:class_disconnect_stale_exports()) ls5-OST0349: disconnect stale client <span class="error">&#91;UUID&#93;</span>@&lt;unknown&gt;</p> <p>BUG: unable to handle kernel paging request at 0000000100000017<br/> IP: <span class="error">&#91;&lt;ffffffffa05ab58f&gt;&#93;</span> target_handle_connect+0x9ff/0x2220 <span class="error">&#91;ptlrpc&#93;</span></p> <p>Pid: 15974, comm: ll_ost_506<br/> machine_kexec<br/> crash_kexec<br/> oops_end<br/> no_context<br/> __bad_area_nosemaphore<br/> __do_page_fault<br/> do_page_fault<br/> page_fault<br/> <span class="error">&#91;exception RIP: target_handle_connect+2559&#93;</span><br/> dequeue_entity<br/> __switch_to<br/> ost_handle<br/> ptlrpc_main<br/> kernel_thread</p> <a href="https://github.com/chaos/lustre/commits/2.1.0-llnl">https://github.com/chaos/lustre/commits/2.1.0-llnl</a><br/> RHEL 6.2 LU-1093

unable to handle kernel paging request in target_handle_connect()

Bug Minor Resolved Duplicate Oleg Drokin Ned Bass Fri, 10 Feb 2012 17:47:05 +0000 Mon, 30 Apr 2012 11:56:59 +0000 Mon, 30 Apr 2012 11:56:59 +0000 Lustre 2.1.0 0 3 <p>The disconnect stale client message is about clients that failed to contact the server during the recovery window.<br/> Were they dead or is there some other problem at play?</p> <p>We are still trying to understand what happened, but it's hard to identify the clients because the UUIDS are all @&lt;unknown&gt;. It could be that they were BGP nodes that get rebooted between jobs. We suspect RPC traffic was not moving through the system well, but we don't know if it was due to high server load or some network or LNET router issue.</p> <p>Believed to be a duplicate of <a href="https://jira.whamcloud.com/browse/LU-1092" title="NULL pointer dereference in filter_export_stats_init()" class="issue-link" data-issue-key="LU-1092"><del>LU-1092</del></a></p> Development Rank 1|hzvhd3: Rank (Obsolete) 6462 Severity