PI67531: RACE CONDITION CAN CAUSE CLEARCASE REMOTE CLIENT SERVER TO REACH THE MAX CONNECTION LIMIT

Rational ClearCase Fix Pack 12 (8.0.1.12) for 8.0.1
Rational ClearCase Fix Pack 2 (9.0.0.2) for 9.0
Rational ClearCase Fix Pack 13 (8.0.1.13) for 8.0.1
Rational ClearCase Fix Pack 3 (9.0.0.3) for 9.0
Rational ClearCase Fix Pack 14 (8.0.1.14) for 8.0.1
Rational ClearCase Fix Pack 4 (9.0.0.4) for 9.0
Rational ClearCase Fix Pack 15 (8.0.1.15) for 8.0.1
Rational ClearCase Fix Pack 5 (9.0.0.5) for 9.0
Rational ClearCase Fix Pack 6 (9.0.0.6) for 9.0
Rational ClearCase Fix Pack 16 (8.0.1.16) for 8.0.1
Rational ClearCase Fix Pack 17 (8.0.1.17) for 8.0.1
Rational ClearCase Fix Pack 18 (8.0.1.18) for 8.0.1
Rational ClearCase Fix Pack 19 (8.0.1.19) for 8.0.1
Rational ClearCase Fix Pack 20 (8.0.1.20) for 8.0.1
Rational ClearCase Fix Pack 21 (8.0.1.21) for 8.0.1
Rational ClearCase Fix Pack 22 (8.0.1.22) for 8.0.1
Rational ClearCase Fix Pack 23 (8.0.1.23) for 8.0.1
Rational ClearCase Fix Pack 24 (8.0.1.24) for 8.0.1
Rational ClearCase Fix Pack 25 (8.0.1.25) for 8.0.1

APAR status

• Closed as program error.

Error description

• After a CCRC connection is allowed to expire, a race condition
  can occur when the CCRC client attempts to reconnect to the CCRC
  server. This will cause the client to use more sessions for a
  single user on the server than it should. Eventually the CCRC
  server will run out of sessions and new client connections will
  not be possible.
  
  A generic login error will be seen by the client:
  CRMAP7009: Command "Login" failed: Error: "Unable to connect to
  server at URL <url>.
  
  The CCRC server logs will contain the following message:
  CCRC WAN Server has reached maximum session capacity.
  

Local fix

• n/a
  

Problem summary

• ****************************************************************
  * USERS AFFECTED:                                              *
  * User of an IBM ClearCase CCRC WAN server.                    *
  ****************************************************************
  * PROBLEM DESCRIPTION:                                         *
  * In rare conditions when automatically re-establishing a      *
  * login session to an IBM Rational ClearCase CCRC WAN server,  *
  * a CTE, CMAPI or rcleartool client might consume all the      *
  * sessions available on a CCRC WAN server.                     *
  ****************************************************************
  * RECOMMENDATION:                                              *
  ****************************************************************
  

Problem conclusion

• A fix is available in ClearCase versions 8.0.1.12 and 9.0.0.2
  

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:

Fix information

• Fixed component name

  CLEARCASE WIN

• Fixed component ID

  5724G2900

Applicable component levels

• R801 PSY

     UP

• R900 PSY

     UP