[LANG-1086] Remove busy wait from AtomicSafeInitializer.get()

• Type: Improvement
• Status: Reopened
• Priority: Major
• Resolution: Unresolved
• Fix Version/s: Discussion
• Component/s: lang.concurrent.*
• Labels: github
• Assignee: Benedikt Ritter
• Reporter: Benedikt Ritter
• Created: 23/Feb/15 19:57
• Updated: 28/Mar/15 12:16

Description

Placeholder ticket for https://github.com/apache/commons-lang/pull/46

Remove the busy wait from AtomicSafeInitializer.get().

Also ensure waiting threads do not wait indefinitely after initialize() throws an exception, instead throwing the same exception, re-wrapped, for each requester.

Brought the unit tests up to 100% coverage on AtomicSafeInitializer. Eliminated race condition on verifying at least one thread waiting for initialize() to complete in another thread.