MDC Adapter with configurable InheritableThreadLocal
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Key: LBCLASSIC-301
URL: http://jira.qos.ch/browse/LBCLASSIC-301
Project: logback-classic
Issue Type: Improvement
Components: appender
Affects Versions: 0.9.28
Reporter: Alexander Treptow
Assignee: Logback dev list
Priority: Minor
Attachments: LogbackMDCAdapter.java
In our application we use a sifting file appender to log bot requests to a
different log file than normal user requests. We have several sensor and
aggregation threads that are started on different times that also have some
logging output.
My Problem:
Log statements from request-independent threads are posted to bot.log and
main.log on random.
My Solution:
I patched the LogbackMDCAdapter to be configureable by a system variable, to
disable inheritance of the thread local member "copyOnInheritThreadLocal".
The patched version defaults to old behavior, so it doesn't change if you do
not configure it.
To disable inheritance of that member, just pass
"logback.threadlocal.inherit.copy=false" to the JVM.
I applied the patch to Version 0.9.28 and tested it with our application. Maybe
other logback users also want to configure logback in that way.
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