IZ65101: SOCKETS REMAIN IN LISTEN STATE EVEN AFTER PROCESS EXITS APPLIES TO AIX 5300-11

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• A Multithreaded application (using sockets in it's code)
  when killed can leave some sockets still open. These
  sockets remain  in LISTEN  state. These sockets may be
  holding on to a particular port and so these ports will
  not available for any application. So if any application
  is
  dependent on a particular port number to restart, will
  not
   restart.  This problem was investigated and found in aix
  with oracle oacore & oafm applications when using java
  1.6.
  
  Example:-
  one can see following socket state even after the using
  process exited.
  
  # netstat -Aan | grep 21552
  f10002000004e398 tcp4  0  0  *.21552  *.*  LISTEN
  

Local fix

• The user can check using
  
  # netstat -Ana | grep <port number>
  
  This will give the port that is still in the listen
  state.
  
  use rmsock to remove these sockets
  
  Or
  
  
  # export  XPG_SUS_ENV=ON
  

Problem summary

• Fileptr mishandling during dup2
  

Problem conclusion

• Handle interrupts return code from closex
  

Temporary fix

Comments

• 5300-08 - use AIX APAR IZ69627
  5300-09 - use AIX APAR IZ69419
  5300-10 - use AIX APAR IZ63084
  5300-11 - use AIX APAR IZ65101
  6100-04 - use AIX APAR IZ64468
  

APAR Information

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

  IZ63084

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

Fix information

• Fixed component name

  AIX 5.3

• Fixed component ID

  5765G0300

Applicable component levels

• R530 PSY U832725

     UP10/02/08 I 1000