PI56546: FTP IS SLOW TO CLOSE A CONNECTION WHEN THE CLIENT SENDS IN THE QUIT COMMAND.

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• FTP using SSL can have a delay up to 10 seconds for the
  connection to end when the QUIT command is sent. If using ATTLS
  or FTP in the clear there is no delay and the connection ends
  immediately.
  

Local fix

• Use ATTLS or FTP in the clear
  

Problem summary

• ****************************************************************
  * USERS AFFECTED:                                              *
  * All users of the IBM Communications Server for z/OS Version  *
  * 2 Release 1 and 2: FTP Server                                *
  ****************************************************************
  * PROBLEM DESCRIPTION:                                         *
  * FTP server takes about 10 seconds to close its connection    *
  * when the client sends a quit command.                        *
  ****************************************************************
  * RECOMMENDATION:                                              *
  * Apply PTF.                                                   *
  ****************************************************************
  The problem may be summarized as follows -
  1. A FTP connection is established between a non z/os FTP client
  and a FTP server using native SSL
  2. FTP client sends a quit command to the server and closes its
  connection. It then waits for the FTP server's FIN packet to be
  received.
  3. FTP server takes about 10 seconds to close its connection and
  send a FIN.
  

Problem conclusion

• FTP server is modified to close the parent socket before it goes
  to sleep to wait for its child to be set up.
  
  By closing the socket before the sleep the FTP client may
  complete before the server process has ended.  A new FTP
  client connection for the same USERID will create new
  processes.  If this pattern is repeated in rapid succession
  the process limit for the USERID may be reached, resulting
  in failure to create a new process and accompanied by
  the following messages:
  BPXP012I FORK SYSCALL TERMINATED DURING CHILD PROCESSING WITH
  RETURN CODE 0000009C, REASON CODE 0B250012.
  BPXP005I A FORK OR SPAWN ERROR WAS ENCOUNTERED.  RETURN CODE
  00000070 REASON CODE 0B250012
  If this occurs consider increasing the MAXPROCUSER value in your
  BPXPRMxx member, or assigning a PROCUSERMAX value to the OMVS
  segment in RACF for the USERID.
  

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:

  UI35947 UI35948

Modules/Macros

• EZAFTPPR
  

Fix information

• Fixed component name

  TCP/IP V3 MVS

• Fixed component ID

  5655HAL00

Applicable component levels

• R210 PSY UI35947

     UP16/04/12 P F604

• R220 PSY UI35948

     UP16/04/12 P F604

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.