IST2253I
HPRSTALL TIME EXCEEDED FOR RTP puname TO cpname

Explanation

This unsolicited message is issued when HPR has determined that an RTP pipe has encountered a stall condition that could not be alleviated in the time period specified by the HPRSTALL start option. The RTP pipe had been stalled for one of the following reasons:
  • The partner RTP requested retransmission of at least one network layer packet (NLP), but the request could not be honored. This condition is known as a data flow stall.
  • The partner RTP repeatedly requested transmission of the same NLP. This condition is known as a transmission stall.
In the message text:
puname
The name of the HPR PU.
cpname
The name of the CP at the other end of the pipe.

See the HPRSTALL start option information in z/OS Communications Server: SNA Resource Definition Reference.

System action

HPR deactivates the RTP pipe to end the hung sessions.

Operator response

For information about why the RTP pipe was stalled and to possibly prevent future stalls, refer to the related messages that were issued for the puname and cpname combination:
  • To check for a data flow stall, find an occurrence of message IST1955I that is not followed by an associated IST1957I message to indicate that the stall was alleviated.
  • To check for a transmission stall, find an occurrence of message IST2245I that is not followed by an associated IST2247I message to indicate that the stall was alleviated.

If both conditions are found, the one that occurs first caused the timeout indicated by this message.

If you no longer want VTAM® to automatically deactivate stalled RTP pipes or if you want VTAM to wait longer before doing so, use the MODIFY VTAMOPTS command to change the value of the HPRSTALL start option.

If stalls are prevalent and persistent, save the system log and request a dump for problem determination, then contact the system programmer.

System programmer response

If you no longer want VTAM to automatically deactivate stalled RTP pipes or if you want VTAM to wait longer before doing so, change the value of HPRSTALL in the appropriate ATCSTRxx start list.

User response

Not applicable.

Problem determination

If transmission stalls are prevalent and persistent, take the following actions:
  • If you have access to IBMLink, search for known problems with similar symptoms. If no similar problems are found, report the problem to IBM® by using the Electronic Technical Report (ETR) option on IBMLink.
  • If you do not have access to IBMLink, report the problem to the IBM software support center.

Source

z/OS® Communications Server SNA

Module

You can display the module that issues a SNA message in the message by setting the MSGMOD start option to YES. See Adding the originating module to the message text for more information about the MSGMOD start option.

Routing code

2

Descriptor code

4

Automation

Not applicable.

Example

IST2253I HPRSTALL TIME EXCEEDED FOR RTP CNR0002F TO NETA.SSCP1A
Parent topic: IST messages for VTAM network operators IST2000I – IST2417I