PK75671: IHS - WHEN AN INVALID EXPECT HEADER IS RECIEVED, HTTP DOES NOT RESPOND UNTIL TIMEOUT VALUE HAS OCCURED.

APAR status

• Closed as program error.

Error description

• When a client sends an "Expect:" header that the server
  does not understand, the request is allowed to timeout
  instead of being terminated immediately with a 417 error.
  
  The length of the timeout is dictated by the TimeOut directive.
  
  https://issues.apache.org/bugzilla/show_bug.cgi?id=38123
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED: Users with custom HTTP clients that send     *
  * unrecognized Expect: headers                                 *
  ****************************************************************
  * PROBLEM DESCRIPTION: Unrecognized value of Expect: header    *
  * does not return an immediate error                           *
  ****************************************************************
  * RECOMMENDATION: Apply this fix if custom clients are timing  *
  * out when using an Expect: header other than "100-Continue"   *
  The internal environment was not initialized at an early enough
  stage to allow the 417 error to discard the rest of the request
  and return the error to the client.
  

Problem conclusion

• The HTTP input filter is loaded earlier and  is able to discard
  the request and return an immediate 417 error.
  
  
  This fix is targetted for IHS 6.0.2.35 and IHS 6.1.0.23
  (n/a for 7.0 release)
  

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

  IBM HTTP SERVER

• Fixed component ID

  5724J0801

Applicable component levels

• R60A PSN

     UP

• R60H PSN

     UP

• R60P PSN

     UP

• R60I PSN

     UP

• R60S PSN

     UP

• R60W PSN

     UP

• R60Z PSN

     UP

• R61A PSN

     UP

• R61H PSN

     UP

• R61P PSN

     UP

• R61I PSN

     UP

• R61S PSN

     UP

• R61W PSN

     UP

• R61Z PSN

     UP