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Bug 1753865 - Start nfs-blkmap.service without blocklayoutdriver warn as blkmapd: open pipe file /var/lib/nfs/rpc_pipefs/nfs/blocklayout failed: No such file or directory
Summary: Start nfs-blkmap.service without blocklayoutdriver warn as blkmapd: open pipe...
Keywords:
Status: CLOSED WONTFIX
Alias: None
Product: Red Hat Enterprise Linux 7
Classification: Red Hat
Component: nfs-utils
Version: 7.7
Hardware: All
OS: Linux
unspecified
low
Target Milestone: rc
: ---
Assignee: Steve Dickson
QA Contact: Yongcheng Yang
URL:
Whiteboard:
Depends On:
Blocks: 1753870
TreeView+ depends on / blocked
 
Reported: 2019-09-20 06:01 UTC by Yongcheng Yang
Modified: 2021-03-20 07:30 UTC (History)
1 user (show)

Fixed In Version:
Doc Type: If docs needed, set a value
Doc Text:
Clone Of:
: 1753870 (view as bug list)
Environment:
Last Closed: 2021-03-20 07:30:45 UTC
Target Upstream Version:
Embargoed:

Attachments (Terms of Use)

Description Yongcheng Yang 2019-09-20 06:01:46 UTC 
Description of problem:
As rhel7 Bug 1563319 says, the NFS client should be able to automatically load module "blocklayoutdriver".
But seems there is always a blkmapd warning after starting nfs-blkmap.service:
"""
blkmapd[43744]: open pipe file /var/lib/nfs/rpc_pipefs/nfs/blocklayout failed: No such file or directory
"""

However, it doesn't affect the following function.

I'm not sure whether this is a real bug. But in the future may receive some complain as more customers using this scenario.


Version-Release number of selected component (if applicable):
nfs-utils-1.3.0-0.65.el7

How reproducible:
always

Steps to Reproduce:
1. modprobe -r blocklayoutdriver
2. systemctl restart nfs-blkmap.service
3. systemctl status nfs-blkmap.service

Actual results:
[05:51:28 root@ ~~]# lsmod | grep blocklayoutdriver
[05:51:28 root@ ~~]# service nfs-blkmap restart
Redirecting to /bin/systemctl restart nfs-blkmap.service
[05:51:28 root@ ~~]# service nfs-blkmap status
Redirecting to /bin/systemctl status nfs-blkmap.service
* nfs-blkmap.service - pNFS block layout mapping daemon
   Loaded: loaded (/usr/lib/systemd/system/nfs-blkmap.service; disabled; vendor preset: disabled)
   Active: active (running) since Mon 2019-09-16 05:51:28 IDT; 43ms ago
  Process: 12014 ExecStart=/usr/sbin/blkmapd $BLKMAPDARGS (code=exited, status=0/SUCCESS)
 Main PID: 12015 (blkmapd)
   CGroup: /system.slice/nfs-blkmap.service
           `-12015 /usr/sbin/blkmapd

Sep 16 05:51:28 kvm-01-guest05.rhts.eng.tlv.redhat.com systemd[1]: Starting pNFS block layout mapping daemon...
Sep 16 05:51:28 kvm-01-guest05.rhts.eng.tlv.redhat.com blkmapd[12015]: open pipe file /var/lib/nfs/rpc_pipefs/nfs/blocklayout failed: No such file or directory                 <<<<<<<<<<<<<<<<<<
Sep 16 05:51:28 kvm-01-guest05.rhts.eng.tlv.redhat.com systemd[1]: Started pNFS block layout mapping daemon.

Expected results:
No warning

Additional info:
RHEL8 also has this problem.
Comment 4 RHEL Program Management 2021-03-20 07:30:45 UTC 
After evaluating this issue, there are no plans to address it further or fix it in an upcoming release.  Therefore, it is being closed.  If plans change such that this issue will be fixed in an upcoming release, then the bug can be reopened.
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