[Bugs] [Bug 1473968] New: rda-cache-limit filled with (null) value after use parallel-readdir

[bugzilla at redhat.com]

https://bugzilla.redhat.com/show_bug.cgi?id=1473968

            Bug ID: 1473968
           Summary: rda-cache-limit filled with (null) value after use
                    parallel-readdir
           Product: GlusterFS
           Version: 3.10
         Component: glusterd
          Assignee: bugs at gluster.org
          Reporter: lav at etersoft.ru
                CC: bugs at gluster.org



Description of problem:

Any operations failed with rda-cache-limit related error:
# gluster volume set ftp-pvt performance.rda-cache-limit 10M
volume set: failed: invalid number format "5242880(null)" in option
"rda-cache-limit"

Version-Release number of selected component (if applicable):
3.10.1, 3.10.3

How reproducible:

I did on 3.10.1
# gluster volume set ftp-pub performance.parallel-readdir on
volume set: success

After it I can't disable it:
# gluster volume set ftp-pub performance.parallel-readdir off
volume set: failed: Staging failed on euclid. Error: invalid number format
"5242880(null)" in option "rda-cache-limit"
Staging failed on asu. Error: invalid number format "5242880(null)" in option
"rda-cache-limit"
Staging failed on nun. Error: invalid number format "5242880(null)" in option
"rda-cache-limit"
Staging failed on cellar. Error: invalid number format "5242880(null)" in
option "rda-cache-limit"
Staging failed on multi. Error: invalid number format "5242880(null)" in option
"rda-cache-limit"
Staging failed on server. Error: invalid number format "5242880(null)" in
option "rda-cache-limit"


Actual results:
files like /var/lib/glusterd/vols/ftp-pub/trusted-ftp-pub.tcp-fuse.vol contains

volume ftp-pvt-readdir-ahead-0
    type performance/readdir-ahead
    option rda-cache-limit 5242880(null)
    option rda-request-size 131072
    option parallel-readdir on
    subvolumes ftp-pvt-replicate-0
end-volume



Expected results:
correct value (without (null))
    option rda-cache-limit 5242880


Additional info:

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