PM27570: SERVLET RENDERING RETURN A BLANK PAGE INTERMITTENTLY

APAR status

• Closed as program error.

Error description

• This is caused by a bug of the base cache. The 304 response was
  cached by the base cache. And browser which haven't render the
  content will display a blank page. Steps to reproduce
  1. Disable basic cache, set
  connect.businesslogic.defaultcache=false
  2. Restart server
  3. Clear browser-1 cache
  4. Request item from browser-1
  5. Enable basic cache, set
  connect.businesslogic.defaultcache=true
  6. Restart server
  7. Request item from browser-1 (IMPORTANT DON"T CLEAR CACHE)
  8. This should cause a 304 response to be cached in the Basic
  cache
  9. Clear browser-2 cache
  10. Request item from browser-2
  11. You should get a blank response in browser-2
  

Local fix

• There is a workaround for this issue. Switching to advance cache
  should work fine.
  With the fix, 304 response won't be cached any more.
  

Problem summary

• Servlet rendering return a blank page intermittently.
  This is caused by a bug of the base cache. The 304 response was
  cached by the base cache. And browser which haven't render the
  content will display a blank page. Steps to reproduce
  1. Disable basic cache, set
  connect.businesslogic.defaultcache=false
  2. Restart server
  3. Clear browser-1 cache
  4. Request item from browser-1
  5. Enable basic cache, set
  connect.businesslogic.defaultcache=true
  6. Restart server
  7. Request item from browser-1 (IMPORTANT DON"T CLEAR CACHE)
  8. This should cause a 304 response to be cached in the Basic
  cache
  9. Clear browser-2 cache
  10. Request item from browser-2
  11. You should get a blank response in browser-2
  

Problem conclusion

• There is a workaround for this issue. Switching to advance cache
  should work fine.
  With the fix, 304 response won't be cached any more.
  

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

  LOTUS WEB CONT

• Fixed component ID

  5724I2900

Applicable component levels

• R610 PSY

     UP

• R615 PSY

     UP

• R61A PSY

     UP

• R61B PSY

     UP

• R61C PSY

     UP