Deadlock between FileHandler and ConsoleHandler when using customized formatter

Shi Jun Zhang zhangshj at
Thu Dec 5 06:54:13 UTC 2013

On 11/30/2013 12:05 AM, Daniel Fuchs wrote:
> On 11/29/13 4:56 PM, Alan Bateman wrote:
>> On 29/11/2013 10:08, Daniel Fuchs wrote:
>>> However, removing or just moving the lock around might well 
>>> introduce new
>>> unknown issues - so it will need to be carefully anaIyzed, and I am
>>> not sure
>>> it can/should be attempted in a minor JDK release.
>> Yes, we have to be very careful as the logging code has a history of
>> biting the hand of those that try to improve it. For various reasons, it
>> seems there is a lot of code that has subtle dependencies on the
>> implementation, on the initialization in particular. In any case, you
>> are to be applauded for tackling the synchronization issues and it would
>> be a good project to re-examine all of this in JDK 9 to see how it would
>> be simplified.
>> On documenting the locking details in an @implNote (which seems to be
>> one of the suggestions here) then we also need to be careful as I think
>> we need some flexibility to change some of this going forward.
> Yes - that's a two edged sword indeed. We certainly don't want to set
> that in stone... On the other hand I empathizes with developers who
> struggle to find out what they can - and can't do - when extending
> j.u.l APIs...
> Anyway, if usage of the 'synchronized' keyword never appears in
> the Javadoc I guess that's for good reasons...
> Thanks Alan,
> -- daniel
>> -Alan
Hi Daniel,

This thread is silent for several days, do you have any finding in 


Shi Jun Zhang

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