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Quick Lists
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Bug ID:
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4175308
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Votes
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0
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Synopsis
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java.text.SimpleDateFormat is not thread safe.
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Category
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java:classes_text
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Reported Against
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1.1.6
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Release Fixed
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State
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11-Closed, duplicate of 4093418,
bug
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Priority:
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4-Low
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Related Bugs
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4093418
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Submit Date
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22-SEP-1998
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Description
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Just create a program having lots of threads
which format dates with:
dateFormatter.format(new Date());
When I use the format pattern:
[dd/MMM/yyyy:HH:mm:ss z]
I get formatted dates like the following:
[05/May/1998:14:46:33 PDT]
[05/May/1998:14:46:34 PDT]
[0005/May/1998:14:46:34 PDT]
[05/May/1998:14:46:34 PDT]
[05/May/1998:14:46:34 PDT]
[0005/May/1998:14:46:0034 PDT]
[0005/May/1998:14:46:0034 PDT]
[05/May/1998:14:46:0034 PDT]
[0005/May/1998:14:46:0034 PDT]
[0005/May/1998:14:0046:34 PDT]
[05/May/1998:14:0046:34 PDT]
(with lots of extra zeros here and there).
(Review ID: 29763)
======================================================================
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Work Around
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The workaround is to put a synchronized block
around every place where I format dates with
their common formatter:
synchronized (dateFormatter) {
dateFormatter.format(new Date());
}
Why not simply make date formatting thread safe
in the same way you've just fixed the problem
with number formatting (Bug Id 4101500).
======================================================================
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Evaluation
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N/A
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Comments
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PLEASE NOTE: JDK6 is formerly known as Project Mustang
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