OA42994: NFS CLIENT CONNECTION TIMEOUT.

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• Customer firewall drops NFS connection after 30 minutes of
  inactiviity.  An attempted mount takes 12 minutes to complete.
  Keepalive needs to be added to NFS Client.
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED: All z/OS NFS Client users.                   *
  ****************************************************************
  * PROBLEM DESCRIPTION: The customer has an environment with    *
  *                      firewall that silently drops inactive   *
  *                      connections after 30 minutes.           *
  *                      After connection has been dropped z/OS  *
  *                      NFS Client takes a lot of time (12+     *
  *                      minutes) to re-establish socket         *
  *                      connection.                             *
  ****************************************************************
  * RECOMMENDATION:                                              *
  ****************************************************************
  After analysis TCPIP L2 recommends to use KEEPALIVE socket
  option. If keepalive is turned on for connections then they
  would have been dropped when there is no response
  to the keepalives.
  

Problem conclusion

• GFSC0RPC::sokTcp() has to be enhanced with
  setsockopt(SO_KEEPALIVE).
  

Temporary fix

Comments

• ž**** PE14/03/10 FIX IN ERROR. SEE APAR OA44723  FOR DESCRIPTION
  

APAR Information

• APAR is sysrouted FROM one or more of the following:

• APAR is sysrouted TO one or more of the following:

  UA70451 UA70542 UA70543

Modules/Macros

• GFSC0RPC
  

Fix information

• Fixed component name

  NETWORK FILE SY

• Fixed component ID

  5695DF121

Applicable component levels

• RC1N PSY UA70451

     UP13/09/19 P F309

• RD1N PSY UA70542

     UP13/09/19 P F309

• R21N PSY UA70543

     UP13/09/19 P F309

Fix is available

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