Re: Applying MDC to stacktraces

[Paul Sowden <ps...@gmail.com>]

Did this happen, if so how do I drive it.

Just to clarify:

This is what I have

DEBUG|0222-164903753|main|foo.LogStuff|1fac9d11-484a-4fda-8bbf-fa1b9cb5d73c|bCodeGoesHere|cCodeGoesHere|||hello
world
ERROR|0222-164903753|main|foo.LogStuff|1fac9d11-484a-4fda-8bbf-fa1b9cb5d73c|bCodeGoesHere|cCodeGoesHere|||Something
bad happened
java.lang.Exception: hahahahaha
	at com.foo.LogStuff.logStuff(LogStuff.java:32)
	at com.foo.Startup.main(Startup.java:12)

This is what I want

DEBUG|0222-164903753|main|foo.LogStuff|1fac9d11-484a-4fda-8bbf-fa1b9cb5d73c|bCodeGoesHere|cCodeGoesHere|||hello
world
ERROR|0222-164903753|main|foo.LogStuff|1fac9d11-484a-4fda-8bbf-fa1b9cb5d73c|bCodeGoesHere|cCodeGoesHere|||Something
bad happened
ERROR|0222-164903753|main|foo.LogStuff|1fac9d11-484a-4fda-8bbf-fa1b9cb5d73c|bCodeGoesHere|cCodeGoesHere|||java.lang.Exception:
hahahahaha
ERROR|0222-164903753|main|foo.LogStuff|1fac9d11-484a-4fda-8bbf-fa1b9cb5d73c|bCodeGoesHere|cCodeGoesHere|||	at
com.foo.LogStuff.logStuff(LogStuff.java:32)
ERROR|0222-164903753|main|foo.LogStuff|1fac9d11-484a-4fda-8bbf-fa1b9cb5d73c|bCodeGoesHere|cCodeGoesHere|||	at
com.foo.Startup.main(Startup.java:12)

Thanks

Paul

On Wed, Oct 28, 2015 at 7:11 AM, Ralph Goers <ra...@dslextreme.com>
wrote:

> A couple of new features have been added that should help you:
> 1. Log4j now supports a PatternSelector so you can have multiple patterns
> specified for an appender.
> 2. A new unreleased feature (it will be in 2.5) is the ability to using
> Scripting on the PatternSelector.  With that you can write a script and if
> the LogEvent contains an exception then you would choose the Pattern that
> includes the MDC information.
>
> Ralph


On Wed, Oct 28, 2015 at 10:56 AM, Paul Sowden <ps...@gmail.com> wrote:

> Hi folks,
>
> I'm looking to migrate from log4j1 to 2 and i'm wondering if there's any
> way of making MDC prefixes appear on all stack trace lines. In 1 I had to
> override subAppend in RollingFileAppender and I'm hoping I don't need to go
> through similar pain in 2.
>
> Thanks
> Paul
>