After a restart SizeAndTimeBasedFNATP uses incorrect sequence numbers for 
rollover files if compression is enabled
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                 Key: LBCORE-161
                 URL: http://jira.qos.ch/browse/LBCORE-161
             Project: logback-core
          Issue Type: Bug
          Components: Rolling
    Affects Versions: 0.9.24
            Reporter: Frank Bos
            Assignee: Logback dev list
            Priority: Minor


To reproduce this issue you can use a setup similar to the one used for 
LBCORE-131, but then use a filename pattern like "log.%d{yyyy-MM-dd}.%i.txt.gz" 
for the RollingPolicy.
This works fine as long as you don't restart the application that is doing the 
logging. The following files are created:

{noformat}
log.2010-08-02.0.txt.gz
log.2010-08-02.1.txt.gz
log.2010-08-02.2.txt     ( = active log file)
{noformat}

However, after a restart the following happens:

{noformat}
log.2010-08-02.0.txt.gz
log.2010-08-02.1.txt.gz
log.2010-08-02.1.txt     (!!)
log.2010-08-02.2.txt.gz
log.2010-08-02.3.txt.gz
log.2010-08-02.4.txt    (the active log file)
{noformat}

So there are now two versions of the logfile with index 1: one zipped and one 
unzipped. They do not contain the same messages!
Also the order of the messages in these logfiles is not what I expected. After 
the restart logback will first create the 'log.2010-08-02.1.txt' file and after 
that it will fill the existing 'log.2010-08-02.2.txt' file to the rollover 
size. 

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