IZ72933: TRAFFICCLASS SOCKET OPTION NOT SUPPORTED WITH IPV4 ON Z/OS JAVA

APAR status

• Closed as program error.

Error description

• SDK for Java on z/OS improperly attempts to set the Traffic
  Class for an IPv4 socket when the
  java.net.Socket.setTrafficClass option is called.
  
  When attempting to set the TrafficClass option on an IPv4
  socket, the following exception will occur:
  
  java.net.SocketException: EDC8109I Protocol not available.
  
  This option is supported in IPv6 but the underlying OS does not
  support it with IPv4. The JVM should ignore this option
  for IPv4 sockets on platforms where it is not supported as per
  the Java API.
  
  This APAR will resolve the failure when using setTrafficClass
  with an IPv4 socket. It will not enable Traffic Class support
  for IPv4 sockets.
  
  KEYWORDS
  setTrafficClass TrafficClass SocketException
  

Local fix

• None
  
  IPv6 sockets are not affected by this problem and support the
  use of the TrafficClass option.
  

Problem summary

• In zOS, setTrafficClass option is not supported by the
  underlying OS for IPv4. No need to throw an error message while
  failing to set such an option as it is an expected behavior.
  

Problem conclusion

• This defect will be fixed in:
  5.0.0 SR11 FP2
  .
  The JVM has been updated to ignore the error message 'Protocol
  not available' for setTrafficClass option for IPv4.
  .
  To obtain the fix:
  Install build 20100917 or later
  

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

  JAVA 5 CLASS LI

• Fixed component ID

  620500130

Applicable component levels

• R500 PSN

     UP