PI61708: CONNECTION PROBLEMS IN WEB BROWSER CLIENT AFTER LONG PERIODS OF INACTIVITY

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• If a user comes back to using the CAE web client after a long
  period of inactivity, they can experience various kinds of
  connection problems such as:
  1. Long periods of waiting for a result
  2. Network errors in datasharing requests.
  This problem occurs when something in the network
  infrastructure (e.g., a firewall) is configured to close
  inactive connections). CAE Server keeps open connections with
  CAE Agents even if there is no activity between CAE Server
  and Agent (no requests from Activity Browser, no requests
  from ISPF client). If these connections are closed by 3rd
  party applications (for example, firewall) due to inactivity
  then this causes unexpected delays when user starts using
  CAE Server again, and sometimes error messages in datasharing
  requests.
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED: Users of IBM DB2 Query Monitor z/OS.         *
  ****************************************************************
  * PROBLEM DESCRIPTION: If a user comes back to using the CAE   *
  *                      web client after a long period of       *
  *                      inactivity, they can experience         *
  *                      various kinds of connection problems    *
  *                      such as:                                *
  *                      1. Long periods of waiting for a        *
  *                       result                                 *
  *                      2. Network errors in datasharing        *
  *                       requests.                              *
  *                      This problem occurs when something in   *
  *                      the network infrastructure (e.g., a     *
  *                      firewall) is configured to close        *
  *                      inactive connections. CAE Server        *
  *                      keeps open connections with  CAE        *
  *                      Agents even if there is no activity     *
  *                      between CAE Server and Agent (no        *
  *                      requests from Activity Browser, no      *
  *                      requests from ISPF client). If these    *
  *                      connections are closed by 3rd party     *
  *                      applications (for example, firewall)    *
  *                      due to inactivity then this causes      *
  *                      unexpected delays when user starts      *
  *                      using CAE Server again, and sometimes   *
  *                      error messages in datasharing           *
  *                      requests.                               *
  ****************************************************************
  * RECOMMENDATION: APPLY the PTF.                               *
  ****************************************************************
  Code has been changed to correct this condition.
  

Problem conclusion

• APPLY the PTF.
  

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:

  UI39768

Modules/Macros

• CQMBLOB  CQMCAE   CQMCAEPT CQMCAPI  CQMJAR
  

Fix information

• Fixed component name

  DB2 QUERY MONIT

• Fixed component ID

  5655E6701

Applicable component levels

• R320 PSY UI39768

     UP16/08/03 P F608

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.