[JDK 11] RFR: 8195096: Exception printed on console with custom LogManager on starting Apache Tomcat

[Daniel Fuchs]

Hi Mark,

Thanks for these links and for trying out a solution.

 > On 19/01/18 20:14, Mark Thomas wrote:
 > Thanks again for the hints. I have a work-around that seems to work:
 > https://svn.apache.org/viewvc?view=revision&revision=1821708

I see... so what I think is happening is that in JDK 8, the
handlers from ".handlers" where added to the root logger from
within addLogger(rootLogger) and because ClassLoaderLogManager
overrides LogManager::addLogger, then that part was skipped.

In JDK 9 - that behavior changed - the handlers from ".handlers"
were no longer added because the root logger was already present
in the context when addLogger got called (that was a regression),
but since  ClassLoaderLogManager overrides LogManager::addLogger
anyway - it made no difference for ClassLoaderLogManager.

In JDK 10, to fix the issue, I forced a call that would
add the handlers from ".handlers" to the root logger, but
because this now happens outside of addLogger(rootLogger) (just after)
then ClassLoaderLogManager feels the difference.

hmmm... let me think on this a bit more.

best regards,

-- daniel

On 19/01/18 20:56, Mark Thomas wrote:
> On 19/01/18 20:14, Mark Thomas wrote:
> 
> <snip/>
> 
>> Thanks to both of you for the hints that have got me thinking in new
>> directions for a workaround.
> 
> Thanks again for the hints. I have a work-around that seems to work:
> https://svn.apache.org/viewvc?view=revision&revision=1821708
> 
> It feels a bit hacky. I'd still prefer to be able to override
> addInitialRootLoggerHandlers() as that strikes me as a cleaner solution.
> 
> Cheers,
> 
> Mark
>