IV07506: ABSTRACTCOLLECTION.TOARRAY THROWS ARRAYINDEXOUTOFBOUNDSEXCEPTION IN CONCURRENT ENVIRONMENT

APAR status

• Closed as program error.

Error description

• Error Message: ArrayIndexOutOfBoundsException in
  AbstractCollection.toArray() because the toArray
  method is not designed to handle a concurrent problem.
  .
  Stack Trace: Exception in thread "Thread-17"
  java.lang.ArrayIndexOutOfBoundsException
          at
  java.util.AbstractCollection.toArray(AbstractCollection.java:353
  )
          at CHMTest$ArrayRunnable.run(CHMTest.java:26)
          at java.lang.Thread.run(Thread.java:736)
  .
  

Local fix

• N/A
  

Problem summary

• The problem is caused by using AbstractCollection.toArray in
  concurrent environment.
  

Problem conclusion

• This defect will be fixed in:
  6.0.1 SR1
  6.0.0 SR10
  .
  When there are two or more threads, it is possible a collection
  grows during toArray is called. The original design doesn't
  handle this case and the returned array
  is not long enough to contain all the items in collection,
  as result, indexoutofbound exception is thrown.
  toArray is changed to handle concurrent "add/remove"
  cases.
  .
  To obtain the fix:
  Install build 20110925 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 CLASS LIBS

• Fixed component ID

  620700130

Applicable component levels

• R600 PSY

     UP