https://issues.apache.org/bugzilla/show_bug.cgi?id=50265
Jeremy Boynes <jboy...@apache.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Depends on| |32311
--- Comment #1 from Jeremy Boynes <jboy...@apache.org> 2011-01-01 15:18:25 EST
---
The caching was added to resolve 32311, which was opened due to contention
issues with DateFormat.getTimeInstance() calling Calendar.getInstance() which
was synchronized. However, the synchronized keyword was removed with Java 1.4
so this should no longer be an issue for us.
#32311 also notes that the calls to format() on the cached formatters are not
thread safe and need to be synchronized; this is missing from the current
implementation. However, in many applications the date/time patterns and Locale
are likely to be the same and the cache only holds one instance of the
formatter. By synchronizing on it we will introduce a contention point just
like the the fix was trying to avoid.
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