All,
I'm in the process of migrating an application from using the log4j 1.x
API to log4j 2, and I'm still using the old properties-based configuration.
I have set -Dlog4j1.compatibility=trueand so my existing
log4j.properties file is being parsed, but these settings do not seem to
have any effect:
log4j.appender.A1=org.apache.log4j.DailyRollingFileAppender
log4j.appender.A1.File = [...]
log4j.appender.A1.Append = true
# Spell this both ways, since log4j2 seems to Really Like PascalCase
log4j.appender.A1.immediateFlush=true
log4j.appender.A1.ImmediateFlush=true
The behavior I see if that if I use tail -f to "watch" the file, the log
messages come out in chunks, likely when a buffer has been filled and
flushed. The messages are cut-off mid-message and are not up-to-date
with what the application has logged.
When switching to XML-based configuration, the "immediate flush"
behavior is working as expected.
I'm using log4j 2.17.1.
I'm prepared to switch-over to using XML-based configuration in general,
but making this work will certainly improve the migration path for
lingering users of log4j 1.x.
Thanks!
-chris
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