Started testing Java9 with log4j 1.2, SLF4J and logback projects

[Rory O'Donnell]

Hi Ceki,

I have updated the wiki.

Rgds,Rory


On 14/02/2017 11:14, Ceki Gülcü wrote:
> Hi Rory,
>
> Thank you for the pointer to JEP 223.
>
> Logback would also fail to parse the new java.version property. I 
> created issue LOGBACK-1260 (See [1]) to track this problem which I 
> expect will be fixed in version 1.2.2, that is the next release of 
> logback.
>
> In the context of SLF4J, the build of the slf4j-log4j12 module fails 
> since log4j can no longer correctly detect the version of Java and 
> shuts down MDC support. In short, the changes introduced in JEP 223 
> have significant consequences for log4j 1.2.x and by ricochet for SLF4J.
>
> Best regards,
>
> -- 
> Ceki Gülcü
>
> [1] https://jira.qos.ch/browse/LOGBACK-1260
>
> On 2/14/2017 11:26, Rory O'Donnell wrote:
>> Hi Ceki,
>>
>> Can you read  JEP 223 <http://openjdk.java.net/jeps/223> it describes
>> how the new version string is implemented in JDK 9.
>>
>> Is logback working with JDK 9 ?
>>
>> Rgds,Rory
>>
>> On 14/02/2017 10:10, Ceki Gülcü wrote:
>>>
>>> Hi All,
>>>
>>>
>>> We started testing SLF4J and logback projects using Java 9, more
>>> specifically build 154. As such, I would appreciate if you could add
>>> the following details onto the Quality Outreach wiki page.
>>>
>>> Contact: Ceki Gülcü
>>> SLF4J mailing list  slf4j-dev AT qos DOT ch
>>> Logback mailing list logback-dev AT qos DOT ch
>>>
>>> Initial testing results
>>> =======================
>>>
>>> Initial testing indicates that log4j version 1.2.x is unable to parse
>>> the result of the call System.getProperties("java.version"). The
>>> returned string is "9-ea". However, log4j 1.2.x expects a string in
>>> the form "1\.*", for example "1.6", "1.7" etc.
>>>
>>> If the string is not in the correct form, log4j 1.2.x conservatively
>>> assumes that it is running under Java 1.1 and disables certain
>>> important functions, such as MDC support. The code in question is the
>>> static initializer of the org.apache.log4j.helpers.Loader class.
>>>
>>> Log4j 1.2.x is no longer maintained. However, there are innumerably
>>> many projects which still use log4j 1.2.x.
>>>
>>> I would suggest that the string returned be in the form "1\.9*" such as
>>> "1.9EA" so as not to break log4j 1.2.x under Java 9.
>>>
>>> Many thanks in advance for taking the above into consideration.
>>>
>>> Best regards,
>>>
>>> -- 
>>> Ceki Gülcü
>>>
>>>
>>>
>>
>> -- 
>> Rgds,Rory O'Donnell
>> Quality Engineering Manager
>> Oracle EMEA , Dublin, Ireland
>>

-- 
Rgds,Rory O'Donnell
Quality Engineering Manager
Oracle EMEA , Dublin, Ireland