PI40931: LOOP IN MODULE EZBTTSND PREVENTS ANY FURTHER CONNECTIONS FROM BEING ACCEPTED

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• Timing issue while sending data to the terminal causes EZBTTSND
  to loop calling the Build_IOV routine.
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED:                                              *
  * All users of the IBM Communications Server                   *
  * for z/OS Version 2 Release 2: Telnet                         *
  * Server                                                       *
  ****************************************************************
  * PROBLEM DESCRIPTION:                                         *
  * Loop in EZBTTSND after a rare                                *
  * timing issue.                                                *
  ****************************************************************
  * RECOMMENDATION:                                              *
  * Apply PTF                                                    *
  ****************************************************************
  The problem may be summarized as follows:
  1. There is a connection between the Telnet server
  and a client.
  2. Data is being sent and received.
  3. One process gets control to send data to the client.
  4. A second process updates the state of the client's
  connection.
  5. After the first process does the send, it enters a
  looping condition because of the changed state.
  

Problem conclusion

• Telnet code is updated to not allow one process to
  loop because the other process updated the state.
  

Temporary fix

Comments

APAR Information

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

  PI39792

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

  UI28245

Modules/Macros

• EZBTTSND
  

Fix information

• Fixed component name

  TCP/IP V3 MVS

• Fixed component ID

  5655HAL00

Applicable component levels

• R220 PSY UI28245

     UP15/07/01 P F506

Fix is available

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