JDK-7173432 : Fix issue with null key at resize of HashMap
  • Type: Bug
  • Component: core-libs
  • Sub-Component: java.util
  • Affected Version: 7-pool,8
  • Priority: P2
  • Status: Closed
  • Resolution: Fixed
  • OS: generic
  • CPU: generic
  • Submitted: 2012-06-01
  • Updated: 2012-06-25
  • Resolved: 2012-06-25
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JDK 7 JDK 8
7u6Fixed 8 b43Fixed
Description
If the key to be insterted into a HashMap is null and the table needs to be resized as part of the insertion then addEntry will try to recalculate the hash of a null key. This will fail with an NPE.

Comments
WORK AROUND http://hg.openjdk.java.net/jdk8/tl/jdk/rev/7baa22e6a6b3
01-06-2012

WORK AROUND http://hg.openjdk.java.net/jdk7u/jdk7u-dev/jdk/rev/421b71e31687
01-06-2012

SUGGESTED FIX as per evaulation
01-06-2012

EVALUATION use the same logic for calls to hash() as elsewhere: hash = (null != key) ? hash(key) : 0;
01-06-2012