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Created attachment 1508260 [details]
messages and vdsm log from SPM, engine.log

Description of problem:
I run a cluster with about 15 hosts for automated testing purposes. We start to see "Data Center is being initialized" messages and disks in state "locked" or "illegal". /var/log/messages shows:

kernel: lvm[55452]: segfault at 18 ip 00007f082e700905 sp 00007ffdff4ae080 error 4 in libc-2.17.so[7f082e67e000+1c3000]

Version-Release number of selected component (if applicable):
Linux 3.10.0-862.14.4.el7.x86_64 
vdsm-4.20.43-1.el7.x86_64
lvm2-2.02.177-4.el7.x86_64
oVirt 4.2.7.4-1.el7

How reproducible:
Generate load on hosts by automatically creating vms, running vm workloads, deleting vms

Steps to Reproduce:
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Actual results:


Expected results:


Additional info:

Do you have the core file?  That might help us get to the bottom a bit quicker.