[PATCH] JDK-6809322: Missing notifications from javax.management.timer.Timer

[Jaroslav Bachorik]

I am looking for a review and a sponsor.

The issue is about some javax.management.timer.Timer notifications not
being received by the listeners if the notifications are generated rapidly.

The problem is caused by ConcurrentModificationException being thrown -
the exception itself is ignored but the dispatcher logic is skipped.
Therefore the currently processed notification gets lost.

The CME is thrown due to the Timer.timerTable being iterated over while
other threads try to remove some of its elements. Fix consists of
replacing the Hashtable used for Timer.timerTable by ConcurrentHashMap
which handles such situations with grace.

The patch webrev is available @
https://jbs.oracle.com/bugs/browse/JDK-6809322

Thanks,

-JB-