Oracle ZFS Storage Appliance: NFS client 'showmount' command returns "... rpc mount export: RPC: Timed out"

Asset ID:	1-72-2003160.1
Update Date:	2018-05-04
Keywords:

Solution Type Problem Resolution Sure

Solution 2003160.1 : Oracle ZFS Storage Appliance: NFS client 'showmount' command returns "... rpc mount export: RPC: Timed out"

Related Items


Sun ZFS Storage 7420
 Oracle ZFS Storage ZS5-2
 Oracle ZFS Storage ZS3-2
 Sun Storage 7110 Unified Storage System
 Sun Storage 7210 Unified Storage System
 Oracle ZFS Storage ZS4-4
 Sun Storage 7410 Unified Storage System
 Oracle ZFS Storage ZS5-4
 Sun ZFS Storage 7120
 Oracle ZFS Storage ZS3-4
 Sun Storage 7310 Unified Storage System
 Sun ZFS Storage 7320
 Oracle ZFS Storage ZS3-BA

Related Categories


PLA-Support>Sun Systems>DISK>ZFS Storage>SN-DK: 7xxx NAS

In this Document

Symptoms

Changes

Cause

Solution

References

Created from <SR 3-9935952241>

Applies to:

Sun ZFS Storage 7420 - Version All Versions and later
Sun ZFS Storage 7320 - Version All Versions and later
Sun ZFS Storage 7120 - Version All Versions and later
Oracle ZFS Storage ZS3-4 - Version All Versions and later
Oracle ZFS Storage ZS3-2 - Version All Versions and later
7000 Appliance OS (Fishworks)

Symptoms

The NFS client servers are not able to create any volumes on the guest vServers. The program is failing with an error message: 'Unable to access file system at 192.xxx.xxx.xxx: rpc mount export: RPC: Timed out'.

On the nodes, "showmount -e x.x.x.x", works with the direct IP address of the active storage NAS head - but, it does not work with the 'floating' IP address of the storage 192.xxx.xxx.xxx

In the ZFS BUI, Configuration -> Network -> 192.xxx.xxx.xxx is Green.

[root@ 01 ~]# showmount -e 192..x.x.x
rpc mount export: RPC: Timed out
[root@a 01 ~]# showmount -e 10.x.x.x
rpc mount export: RPC: Timed out

Changes

Cause

In this example, we do not see any RPC timeout errors logged on the NAS Appliance.

Solution

Tests run with dig -x commands show that the DNS servers of the customer are slow to respond to requests.

The DNS servers did not have any reverse lookup data for the IP addresses that the customer was using.

Once the 'reverse lookup' DNS SRV records were added, the RPC time out messages disappeared and the customer's applications (in this case, Exadata) work without errors.

*** Check for Relevancy - 04-May-2018 ***

References

<NOTE:1388907.1> - Why ZFS Appliance Makes RPC Calls to Clients with NFS protocol in Exalogic
<NOTE:1922158.1> - Sun Storage 7000 Unified Storage System: BUI Error - call for param #1 to array.create failed: event missing required elt: fault-list
<NOTE:1409693.1> - Sun Storage 7000 Unified Storage System: NFSv4 clients cannot mount shares if NFSv4 identity domains do not match

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