JDK 9 RFR of 8150206: Demote LFMultiThreadCachingTest.java to tier 2 until resolution of JDK-8150014

[Paul Sandoz]

Hi Martin,

Your patch to TLR and SR looks good:

  http://cr.openjdk.java.net/~martin/webrevs/openjdk9/jsr166-jdk9-integration/unlambdafyBootstrap/jsr166-jdk9-integration-

Sorry, i should of caught this in review, did notice the change to use lambdas but i forgot that this might cause issues at VM startup.

ConcurrentHashMap is used by infrastructure of j.l.invoke. CHM cannot itself leverage or depend on stuff that leverages lambdas otherwise it may result in a circular dependency at VM startup.

In this case the test tickles the code paths that results in the initialization of ThreadLocalRandom by CHM during startup which explains why it was yet to be observed in other cases.

Paul.

> On 19 Feb 2016, at 07:18, Martin Buchholz <martinrb at google.com> wrote:
> 
> It's easy enough to get the test to pass by delambdafication.
> 
> But we may not want to fix the test because it's not clear whether
> it's a jdk lambda bug or not, and we don't sweep bugs under the rug.
> 
> Maybe instead of a "tier2" bucket we really want a "test found a bug
> that's not yet fixed" bucket?
> 
> On Thu, Feb 18, 2016 at 4:48 PM, joe darcy <joe.darcy at oracle.com> wrote:
>> Hello,
>> 
>> Right now, we are seeing some cross-platform intermittent failures of
>> 
>>    java/lang/invoke/LFCaching/LFMultiThreadCachingTest.java
>> 
>> as noted in bug JDK-8150014. Until that test instability is resolved, the
>> test should be demoted from tier 1 to tier 2.
>> 
>> Please see the patch below.
>> 
>> (Circumstantial evidence points to the changes in JDK-8145485 being
>> involved.)
>> 
>> -Joe
>> 
>> diff -r 3973fe856db2 test/TEST.groups
>> --- a/test/TEST.groups    Wed Feb 17 12:47:35 2016 -0800
>> +++ b/test/TEST.groups    Thu Feb 18 16:44:40 2016 -0800
>> @@ -29,6 +29,7 @@
>>     :jdk_lang \
>>     -java/lang/ProcessHandle/TreeTest.java \
>>     -java/util/zip/TestLocalTime.java \
>> +    -java/lang/invoke/LFCaching/LFMultiThreadCachingTest.java \
>>     :jdk_util \
>>     -java/util/WeakHashMap/GCDuringIteration.java \
>>     -java/util/concurrent/ThreadPoolExecutor/ConfigChanges.java \
>> @@ -39,6 +40,7 @@
>>     :jdk_math
>> 
>> tier2 = \
>> +    java/lang/invoke/LFCaching/LFMultiThreadCachingTest.java \
>>     java/lang/ProcessHandle/TreeTest.java \
>>     java/util/zip/TestLocalTime.java \
>>     java/util/WeakHashMap/GCDuringIteration.java \
>>