Bug 1304454

Summary: Seeing Error message in Vm log file 'libust[121880/121886]: Error: Error opening shm /lttng-ust-wait-5 (in get_wait_shm() at lttng-ust-comm.c:886)'
Product: [Red Hat Storage] Red Hat Ceph Storage Reporter: Tanay Ganguly <tganguly>
Component: RBDAssignee: Josh Durgin <jdurgin>
Status: CLOSED ERRATA QA Contact: ceph-qe-bugs <ceph-qe-bugs>
Severity: medium Docs Contact:
Priority: unspecified    
Version: 1.3.2CC: ceph-eng-bugs, hnallurv, jdillama, kdreyer, kurs, mlawrenc
Target Milestone: rc   
Target Release: 1.3.2   
Hardware: x86_64   
OS: Linux   
Whiteboard:
Fixed In Version: RHEL: ceph-0.94.5-7.el7cp Ubuntu: ceph_0.94.5-5redhat1trusty Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2016-02-29 14:46:00 UTC Type: Bug
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:

Description Tanay Ganguly 2016-02-03 16:32:29 UTC 
Description of problem:
Continuously getting the Error message in vm.log file from qemu/kvm

libust[121880/121886]: Error: Error opening shm /lttng-ust-wait-5 (in get_wait_shm() at lttng-ust-comm.c:886) 

Version-Release number of selected component (if applicable):
rpm -qa |grep ceph
ceph-common-0.94.5-4.el7cp.x86_64
ceph-osd-0.94.5-4.el7cp.x86_64
ceph-0.94.5-4.el7cp.x86_64
ceph-radosgw-0.94.5-4.el7cp.x86_64
ceph-debuginfo-0.94.5-4.el7cp.x86_64
ceph-selinux-0.94.5-4.el7cp.x86_64

selinux:
Loaded policy name:             targeted

How reproducible:
Always

Steps to Reproduce:
1. Create a RBD image, take snap and clone it.
2. Attach the same image in Qemu.
3. Create a VM on top of that RBD clone image.
4. Do some write operations of that image.

Actual results:
Seeing lots of Error in log message of the VM

Expected results:
There should not be any Error log message.

Additional info:


libust[121880/121886]: Error: Error opening shm /lttng-ust-wait-5 (in get_wait_shm() at lttng-ust-comm.c:886)
libust[121880/121886]: Error: Error opening shm /lttng-ust-wait-5 (in get_wait_shm() at lttng-ust-comm.c:886)
libust[121880/121886]: Error: Error opening shm /lttng-ust-wait-5 (in get_wait_shm() at lttng-ust-comm.c:886)
libust[121880/121886]: Error: Error opening shm /lttng-ust-wait-5 (in get_wait_shm() at lttng-ust-comm.c:886)
libust[121880/121886]: Error: Error opening shm /lttng-ust-wait-5 (in get_wait_shm() at lttng-ust-comm.c:886)
libust[121880/121886]: Error: Error opening shm /lttng-ust-wait-5 (in get_wait_shm() at lttng-ust-comm.c:886)
libust[121880/121886]: Error: Error opening shm /lttng-ust-wait-5 (in get_wait_shm() at lttng-ust-comm.c:886)
libust[121880/121886]: Error: Error opening shm /lttng-ust-wait-5 (in get_wait_shm() at lttng-ust-comm.c:886)
libust[121880/121886]: Error: Error opening shm /lttng-ust-wait-5 (in get_wait_shm() at lttng-ust-comm.c:886)
libust[121880/121886]: Error: Error opening shm /lttng-ust-wait-5 (in get_wait_shm() at lttng-ust-comm.c:886)
libust[121880/121886]: Error: Error opening shm /lttng-ust-wait-5 (in get_wait_shm() at lttng-ust-comm.c:886)
libust[121880/121886]: Error: Error opening shm /lttng-ust-wait-5 (in get_wait_shm() at lttng-ust-comm.c:886)
libust[121880/121886]: Error: Error opening shm /lttng-ust-wait-5 (in get_wait_shm() at lttng-ust-comm.c:886)
libust[121880/121886]: Error: Error opening shm /lttng-ust-wait-5 (in get_wait_shm() at lttng-ust-comm.c:886)
libust[121880/121886]: Error: Error opening shm /lttng-ust-wait-5 (in get_wait_shm() at lttng-ust-comm.c:886)
libust[121880/121886]: Error: Error opening shm /lttng-ust-wait-5 (in get_wait_shm() at lttng-ust-comm.c:886)
libust[121880/121886]: Error: Error opening shm /lttng-ust-wait-5 (in get_wait_shm() at lttng-ust-comm.c:886)
libust[121880/121886]: Error: Error opening shm /lttng-ust-wait-5 (in get_wait_shm() at lttng-ust-comm.c:886)
libust[121880/121886]: Error: Error opening shm /lttng-ust-wait-5 (in get_wait_shm() at lttng-ust-comm.c:886)
Comment 2 Ken Dreyer (Red Hat) 2016-02-03 23:05:52 UTC 
We missed some selinux patches (bz 1304455). They will be in the next spin.
Comment 6 Tanay Ganguly 2016-02-14 17:01:52 UTC 
Marking it verified.

As i do not see any further error logs from my VM.log

libust[121880/121886]: Error: Error opening shm /lttng-ust-wait-5 (in get_wait_shm() at lttng-ust-comm.c:886)


Ceph Build:
ceph-common-0.94.5-9.el7cp.x86_64
ceph-selinux-0.94.5-9.el7cp.x86_64
ceph-0.94.5-9.el7cp.x86_64
ceph-osd-0.94.5-9.el7cp.x86_64
Comment 8 errata-xmlrpc 2016-02-29 14:46:00 UTC 
Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://access.redhat.com/errata/RHBA-2016:0313