PK66784: FAILED RESPONSES (>500) AND NOT-MODIFIED RESPONSES (304) FROM WCM CAN BE CACHED BY SERVLET CACHING

APAR status

• Closed as program error.

Error description

• If servlet caching is enabled then sometimes failed HTTP
  responses (ie. those with a response code of greater than 500)
  and not-modified HTTP responses (ie. those with a response code
  of 304) will be cached within the servlet cache. This causes a
  problem because dynacache will then send back these invalid
  responses to other users instead of asking WCM to perform these
  requests again.
  

Local fix

• WCM wasn't forcibly disabling the servlet cache when sending
  back failed and non-modified responses.The WCM servlet was
  modified to disable servlet caching when sending back failed and
  non-modified responses.
  

Problem summary

• Users affected: All IWWCM users
  
  Detailed Problem Description:
  
  If servlet caching is enabled then sometimes failed HTTP
  responses (ie. those with a response code of greater than 500)
  and not-modified HTTP responses (ie. those with a response code
  of 304) will be cached within the servlet cache. This causes a
  problem because dynacache will then send back these invalid
  responses to other users instead of asking WCM to perform these
  requests again.
  

Problem conclusion

• Problem Analysis:
  
  WCM wasn't forcibly disabling the servlet cache when sending
  back failed and non-modified responses
  
  
  Failing Module: WCM - Web Content Management (General)
  
  Problem Solution:
  
  The WCM servlet was modified to disable servlet caching when
  sending back failed and non-modified responses
  

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

  WRKPLC WEB CON

• Fixed component ID

  5724I2900

Applicable component levels

• R60G PSY

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