Analysis on JDK-8022321 java/lang/ref/OOMEInReferenceHandler.java fails intermittently

[srikalyan]

Hi Peter/David, we have 2000 runs without a single failure.

--
Thanks
kalyan
Ph: (408)-585-8040


On 1/23/14, 12:10 PM, srikalyan wrote:
> Hi Peter, i have modified your code from
> r = pending;
> if (r != null) {
>       ......
>
>
>        TO
>
>
> if (pending != null) {
>       r = pending;
> This is because the r is used later in the code and must not be 
> assigned pending unless it is not null(this was as is earlier). The 
> new webrev is posted here 
> http://cr.openjdk.java.net/~srikchan/Regression/JDK-8022321_OOMEInReferenceHandler-webrev-V2/ 
> . I ran a 1000 run and no failures so far, however i would like to run 
> a couple more 1000 runs to assert the fix.
>
> PS: The description section of JEP-122 
> (http://openjdk.java.net/jeps/122) says meta-data would be in native 
> memory(not heap).
> --
> Thanks
> kalyan
> Ph: (408)-585-8040
>
> On 1/21/14, 2:31 PM, Peter Levart wrote:
>>
>> On 01/21/2014 07:17 PM, srikalyan wrote:
>>> Hi Peter/David, catching up after long weekend. Why would there be 
>>> an OOME in object heap due to class loading in perm gen space ?
>>
>> The perm gen is not a problem her (JDK 8 does not have it and we see 
>> OOME on JDK8 too). Each time a class is loaded, new java.lang.Class 
>> object is allocated on heap.
>>
>> Regards, Peter
>>
>>> Please correct if i am missing something here. Meanwhile i will give 
>>> the version of Reference Handler you both agreed on a try.
>>> --
>>> Thanks
>>> kalyan
>>> Ph: (408)-585-8040
>>>
>>> On 1/21/14, 7:24 AM, Peter Levart wrote:
>>>> On 01/21/2014 07:54 AM, Peter Levart wrote:
>>>>> *[Loaded sun.misc.Cleaner from 
>>>>> /home/peter/Apps64/jdk1.8.0-ea-b121/jre/lib/rt.jar]*
>>>>> [Loaded java.io.ByteArrayInputStream from 
>>>>> /home/peter/Apps64/jdk1.8.0-ea-b121/jre/lib/rt.jar]
>>>>> [Loaded sun.util.calendar.ZoneInfoFile$ZoneOffsetTransitionRule 
>>>>> from /home/peter/Apps64/jdk1.8.0-ea-b121/jre/lib/rt.jar]
>>>>> ...
>>>>>
>>>>>
>>>>> I'm on linux, 64bit and using official EA build 121 of JDK 8...
>>>>>
>>>>> But if I try with JDK 7u45, I don't see it.
>>>>
>>>> So what changed between JDK 7 and JDK 8?
>>>>
>>>> I suspect the following: 8007572: Replace existing jdk timezone 
>>>> data at <java.home>/lib/zi with JSR310's tzdb
>>>>
>>>>
>>>> Regards, Peter
>>>>
>>