DY47739: LINUX FAST PATH DOES NOT HANDLE ETIMEDOUT CORRECTLY. THIS MAY CAUSE A LOOP IN THE SOCKET APPLICATION

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• When Linux Fast path receives an ETIMEDOUT error during
  receiving of data, this is not correctly indicated to the socket
  application. It may cause that SELECT reports the socket as
  ready, but a subsequent RECV does not have anything to receive.
  This may cause a loop in a socket application working with
  non-blocking sockets.
  

Local fix

• Avoid ETIMEDOUT errors by enabling keep-alive on the TCP level.
  

Problem summary

• ****************************************************************
  * USERS AFFECTED: All Linux Fast Path users.                   *
  ****************************************************************
  * PROBLEM DESCRIPTION: Linux Fast Path does not handle error   *
  *                      ETIMEDOUT crorrectly. This may cause    *
  *                      a loop in the socket application        *
  ****************************************************************
  * RECOMMENDATION: Install this PTF.                            *
  ****************************************************************
  Linux Fast Path does not handle error ETIMEDOUT crorrectly.
  This may cause a loop in the socket application.
  

Problem conclusion

• The code has been changed to correctly handle the ETIMEDOUT
  situation.
  

Temporary fix

Comments

APAR Information

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

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

  DY47740 UD54265

Modules/Macros

• IJBODEV  IJBODEVB IJBOENTR IJBOSOCK
  

Fix information

• Fixed component name

  VSE/AF MACROS

• Fixed component ID

  5686CF906

Applicable component levels

• R52C PSY UD54265

     UP17/12/01 I 1000

Fix is available

• Select the PTF appropriate for your component level. You will be required to sign in. Distribution on physical media is not available in all countries.