PI84499: IIB PRODUCT LOG4J JARS PICKED UP INSTEAD OF SHARED-CLASSES

APAR status

• Closed as program error.

Error description

• Customers are advised to put their own jars in the
  shared-classes directory.
  
  However, if log4j*.jar is included in the
  shared-classes directory,
  this clashes with the version shipped by IIB for the
  Kafka nodes.
  
  This can result in the following Java exception:
  
    java.lang.IllegalAccessError
  

Local fix

• Customers could include their version of log4j*jar in the
  Application before deploying,
  instead of dropping it in the shared-classes.
  

Problem summary

• ****************************************************************
  USERS AFFECTED:
  All users of IBM Integration Bus 10.0.0.7 and above adding jars
  to the classpath using the shared-classes folder.
  
  
  Platforms affected:
  z/OS, MultiPlatform
  
  ****************************************************************
  PROBLEM DESCRIPTION:
  When adding a jar to the shared-classes diretory for use in
  JavaCompute node, if the classes exist in the shipped jars of
  Kafka (kafka client jar, slf4j or log4j), they will be loaded
  from there, rather than the user jars. For example, log4j jars
  are shipped for the local copy of Kafka, so any log4j jars in
  the shared-classes directory would be ignored. This can lead to
  IllegalAccessErrors as multiple versions of the log4j jars may
  be used, and the wrong one is inistialised with user classes,
  such as Appenders.
  
  This APAR is also used to fix a similar issue in the MQTT jars,
  as these suffer the same problem.
  

Problem conclusion

• Classloading has been changed for MQTT and Kafka jars, removing
  the possible conflicts from the classpath with JavaCompute
  nodes.
  
  ---------------------------------------------------------------
  The fix is targeted for delivery in the following PTFs:
  
  Version    Maintenance Level
  v10.0      10.0.0.10
  
  The latest available maintenance can be obtained from:
  http://www-01.ibm.com/support/docview.wss?rs=849&uid=swg27006041
  
  If the maintenance level is not yet available,information on
  its planned availability can be found on:
  http://www-1.ibm.com/support/docview.wss?rs=849&uid=swg27006308
  ---------------------------------------------------------------
  

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

  IIB Z/OS

• Fixed component ID

  5655AB100

Applicable component levels

• RA00 PSY

     UP