PH36601: The z/OS Connect EE build toolkit fails with "java.lang.OutOfMemoryError: Requested array size exceeds VM limit".

APAR status

• Closed as unreproducible in next release.

Error description

• When running the z/OS Connect EE build toolkit (zconbt)
  against a Swagger document to create an artifact file, the
  following error occurs in the Java Virtual Machine (JVM):
  
  Exception in thread "main"
  java.lang.OutOfMemoryError: Requested array size exceeds VM
  limit
  at java.util.ArrayList.<init>(ArrayList.java:153)
  ......
  
  Additional search words: OOM BAQB0012W msgBAQB0012W BAQB0012
  msgBAQB0012
  

Local fix

• Reduce the maxItems size
  

Problem summary

• ****************************************************************
  * USERS AFFECTED: All users of the z/OS Connect EE build       *
  *                 toolkit generating API requester artifacts   *
  *                 (ARAs).                                      *
  ****************************************************************
  * PROBLEM DESCRIPTION: The z/OS Connect EE build toolkit fails *
  *                      with "java.lang.OutOfMemoryError:       *
  *                      Requested array size exceeds VM limit". *
  ****************************************************************
  In the Swagger document, the maxItems for each array type object
  is 2147483647 (Integer.MAX_VALUE in Java). When parsing the
  document, the z/OS Connect EE build toolkit code generated Java
  arrays exceeding the JVM's array capacity for a single array.
  Array elements are referenced using an integer index so the
  theoretical array size limit is 2147483647 elements.  However
  JVM implementations can retain space for array metadata meaning
  arrays cannot be defined with a length close to
  Integer.MAXVALUE.
  

Problem conclusion

Temporary fix

Comments

• The z/OS Connect EE build toolkit has been changed to report the
  following message if the the value for the maxItems property
  exceeds the allowed value:
  
  BAQB0012W: The definition for array <array_name> contains a
             value <value> for property <property_name> that
             exceeds the maximum value of <maximum_value>
  
  
  The maximum value for the array size is 2147483391 elements and
  is not configurable.
  
  The fix for this APAR is expected to be delivered by the PTF for
  z/OS Connect EE V3.0.50.0 (PH40632).
  

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

  Z/OS CONNECT EE

• Fixed component ID

  5655CE300

Applicable component levels