[LOG4J2-1268] FixedDateFormat is incorrect for formats having MMM with the French locale

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.6
• Fix Version/s: 2.6
• Component/s: Core

Environment

French Windows 10, Java 8

• Assignee: Remko Popma
• Reporter: Ludovic HOCHET
• Created: 10/Feb/16 23:49
• Updated: 14/Feb/16 11:28
• Resolved: 12/Feb/16 14:21

Description

While verifying LOG4J2-920 I came across the following tests failures in Core:
FixedDateFormatTest.testFormatLong:147 DATE/1455054137029 expected:<09 févr. 201[6 ]22:42:17,029> but was:<09 févr. 201[]22:42:17,029>
FixedDateFormatTest.testFormatLongCharArrayInt:181 DATE/1455054136333 expected:<09 févr. 201[6 ]22:42:16,333> but was:<09 févr. 201[]22:42:16,333>
FixedDateFormatTest.testFormatLongCharArrayInt_goingBackInTime:199 DATE/1455234136907 expected:<12 févr. 201[6 ]00:42:16,907> but was:<12 févr. 201[]00:42:16,907>
FixedDateFormatTest.testFormatLong_goingBackInTime:163 DATE/1455234136722 expected:<12 févr. 201[6 ]00:42:16,722> but was:<12 févr. 201[]00:42:16,722>

Looking at the code the implementation of FixedDateFormat/FixedFormat expect the size of the pattern MMM (for shot months) to be 3 characters, which in French at least isn't the case.