[Bugs] [Bug 1642488] New: ganesha-gfapi.log contain many E [dht-helper.c:90: dht_fd_ctx_set] 0-prod-dht: invalid argument: fd [Invalid argument]

[bugzilla at redhat.com]

https://bugzilla.redhat.com/show_bug.cgi?id=1642488

            Bug ID: 1642488
           Summary: ganesha-gfapi.log contain many E
                    [dht-helper.c:90:dht_fd_ctx_set] 0-prod-dht: invalid
                    argument: fd [Invalid argument]
           Product: GlusterFS
           Version: 4.1
         Component: ganesha-nfs
          Assignee: bugs at gluster.org
          Reporter: renaud.fortier at fsaa.ulaval.ca
                CC: bugs at gluster.org



Description of problem:
In ganesha-gfapi.log we have this error many times : 

[2018-10-24 13:40:51.429812] E [dht-helper.c:90:dht_fd_ctx_set]
(-->/usr/lib/x86_64-linux-gnu/glusterfs/4.1.5/xlator/cluster/replicate.so(+0x30c27)
[0x7f56a4c20c27]
-->/usr/lib/x86_64-linux-gnu/glusterfs/4.1.5/xlator/cluster/distribute.so(+0x6f46b)
[0x7f56a47a146b]
-->/usr/lib/x86_64-linux-gnu/glusterfs/4.1.5/xlator/cluster/distribute.so(+0x6e67)
[0x7f56a4738e67] ) 0-prod-dht: invalid argument: fd [Invalid argument]

We got it arround 150 time each 15 minutes. NFS-Ganesha export over NFSv4.

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

GlusterFS v4.1.5, Ganesha v2.6.3

How reproducible:

I don't know how to reproduce. It happens on production cluster during normal
operation and clients didn't report issues on usage. Mostly read small files
workload.

Actual results:


Expected results:


Additional info:

gluster volume info prod:

Volume Name: prod
Type: Replicate
Volume ID: e918bd26-3318-48b3-8902-1a3b1de4f0f3
Status: Started
Snapshot Count: 0
Number of Bricks: 1 x 3 = 3
Transport-type: tcp
Bricks:
Brick1: gluster1.local:/data/glusterfs/prod/brick1/brick
Brick2: gluster2.local:/data/glusterfs/prod/brick1/brick
Brick3: gluster3.local:/data/glusterfs/prod/brick1/brick
Options Reconfigured:
performance.nl-cache-timeout: 600
performance.client-io-threads: on
nfs.disable: on
transport.address-family: inet
performance.cache-size: 1GB
performance.parallel-readdir: on
performance.read-ahead: off
cluster.readdir-optimize: on
client.event-threads: 4
server.event-threads: 4
features.cache-invalidation: on
features.cache-invalidation-timeout: 600
performance.cache-invalidation: on
performance.md-cache-timeout: 600
network.inode-lru-limit: 200000
auth.allow: 192.168.1.99,192.168.1.98
performance.nl-cache: on
cluster.enable-shared-storage: enable

NFS-Ganesha export:
EXPORT {
  Export_Id = 3;
  Path = "/prod";
  Pseudo = "/prod";
  Access_Type = RW;
  Squash = No_root_squash;
  Disable_ACL = true;
  Protocols = "4";
  Transports = "UDP","TCP";
  SecType = "sys";
  FSAL {
    Name = "GLUSTER";
    Hostname = localhost;
    Volume = "prod";
  }
}

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