PH34197: ICU4J ILLEGALARGUMENTEXCEPTION ON DEC 31 OF A LEAP YEAR

APAR status

• Closed as program error.

Error description

• An application using the ICU4J library included with WebSphere
  Application Server might encounter the following error on Dec
  31 of a leap year.
  
  Error:
  ====
  Caused by:
  java.lang.IllegalArgumentException: DAY_OF_YEAR=366,
  valid
  range=1..365
  at
  com.ibm.icu.util.Calendar.validateField(Calendar.java:4733)
  at
  com.ibm.icu.util.Calendar.validateField(Calendar.java:4708)
  at
  com.ibm.icu.util.Calendar.validateFields(Calendar.java:4686)
  at
  com.ibm.icu.util.Calendar.computeTime(Calendar.java:4746)
  at
  com.ibm.icu.util.Calendar.updateTime(Calendar.java:4276)
  at
  com.ibm.icu.util.Calendar.getTimeInMillis(Calendar.java:1979)
  at
  com.ibm.icu.util.Calendar.getTime(Calendar.java:1957)
  

Local fix

• Customers intended to use ICU4J with their application are
  recomended to use their own copy of the jar from open source
  and pacakage with application or confgure isolated shared
  library and place the ICU4J jars in the shared library.
  

Problem summary

• ****************************************************************
  * USERS AFFECTED:  All users of IBM WebSphere Application      *
  *                  Server v8.5.5 who have an application which *
  *                  uses ICU4J and uses class-loader mode       *
  *                  parent first                                *
  ****************************************************************
  * PROBLEM DESCRIPTION: On Dec 31 of a leap year, the ICU4J     *
  *                      method, Calendar.getTime(), might       *
  *                      return IllegalArgumentException         *
  ****************************************************************
  * RECOMMENDATION:  Any application needing to use ICU4J        *
  *                  should include the ICU4J library with       *
  *                  the application at the version required by  *
  *                  the application.  If for some reason you    *
  *                  need to use class-loader mode parent        *
  *                  first, your ICU4J library should be set as  *
  *                  an isolated shared library. This will       *
  *                  avoid inadvertently using the ICU4J         *
  *                  library included with WebSphere             *
  *                  Application Server.                         *
  *                  To learn more about isolated shared         *
  *                  libraries see                               *
  *                  http://ibmurl.hursley.ibm.com/OXUJ          *
  ****************************************************************
  Improper validation of dates was performed in ICU4J
  versions prior to 4.8.2, but only on December 31 of a leap
  year.
  This does not affect any known functions in WebSphere
  Application Server.  However, an application using the
  com.ibm.icu.jar which is included in WebSphere Application
  Server v8.5.5 might encounter the problem.
  

Problem conclusion

• The problem is resolved in ICU4J v4.8.2 by ticket ICU-7089 (ICU
  Calendar produces incorrect result after heavy use).  See
  https://unicode-org.atlassian.net/browse/ICU-7089
  
  The problem, as reported to ICU4J, was not related to leap
  year.  However, the leap year problem was fixed as a side
  effect.
  
  The ICU4J library included with WebSphere Application Server
  v8.5.5, com.ibm.icu.jar v4.4.2, now includes the fix.
  
  WebSphere Application Server version 9.0 is not affected as it
  includes ICU4J 54.1 which already includes the fix.
  
  The fix for this APAR is targeted for inclusion in fix pack
  8.5.5.20. For more information, see 'Recommended Updates for
  WebSphere Application Server':
  https://www.ibm.com/support/pages/node/715553
  

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

  WEBS APP SERV N

• Fixed component ID

  5724H8800

Applicable component levels

• R850 PSY

     UP