On 23/09/17 16:10, Rainer Jung wrote:
> Thanks Mark!
> 
> You might also want to look at r1809434 as a candidate and check whether
> that workaround looks OK for you.

Looks good to me. I've added to the list of J9 back-port candidates. It
does beg the question whether or not we want to look at switching to
multi-release JARs for all of the compatibility code. WDYT?

> Wishing you a nice and successful TomcatCon!

Thanks!

Mark


> 
> Regards,
> 
> Rainer
> 
> Am 23.09.2017 um 17:01 schrieb Mark Thomas:
>> On 23/09/17 15:55, Rainer Jung wrote:
>>> Hi all,
>>>
>>> when running TC 8.5.21 (9.0 should be the same) with Java 9 I get the
>>> following warnings on STDOUT during shutdown:
>>
>> Tomcat 9 has the Java 9 fixes. 8.5.x doesn't. I've put together a list
>> of the Java 9 commits that need to be back-ported. Now that Java 9 is
>> final those back-ports need to happen.
>>
>> This is on my TODO list for after TomcatCon London on Tuesday.
>>
>> Mark
>>
>>
>>>
>>> WARNING: An illegal reflective access operation has occurred
>>> WARNING: Illegal reflective access by
>>> org.apache.catalina.loader.WebappClassLoaderBase
>>> (file:/.../lib/catalina.jar) to field java.lang.Thread.threadLocals
>>> WARNING: Please consider reporting this to the maintainers of
>>> org.apache.catalina.loader.WebappClassLoaderBase
>>> WARNING: Use --illegal-access=warn to enable warnings of further illegal
>>> reflective access operations
>>> WARNING: All illegal access operations will be denied in a future
>>> release
>>>
>>>
>>> If I add the mentioned flag, I get more such lines, all referring to
>>> org.apache.catalina.loader.WebappClassLoaderBase and then:
>>>
>>> field java.lang.Thread.threadLocals
>>> field java.lang.Thread.inheritableThreadLocals
>>> field java.lang.ThreadLocal$ThreadLocalMap.table
>>> method java.lang.ThreadLocal$ThreadLocalMap.expungeStaleEntries()
>>> field java.lang.ThreadLocal$ThreadLocalMap$Entry.value
>>> field sun.rmi.transport.Target.ccl
>>> field sun.rmi.transport.Target.stub
>>> field sun.rmi.transport.ObjectTable.objTable
>>> field sun.rmi.transport.ObjectTable.implTable
>>>
>>> Details may vary depending on the cleanup flags set in the loader, but
>>> this is 8.5 with default settings.
>>>
>>> Regards,
>>>
>>> Rainer
> 
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