[8u] [JFR] RFR: JFR backports from 11.0.4

[Andrey Petushkov]

Hi Aleksey,

No, they are not in incubator (yet?). The problem is that some of them did not (yet?) end up in jdk11, and that was
declared as prerequisite for jdk8u-incubator ([1])
Some time ago there were discussion around JDK-8185525 which turned into general discussion on criteria for deciding
whether change in JFR is subject for backport ([2]). I still own an AI to provide list of all JFR fixes Azul believes are
useful to backport. It's a shame but I did not manage to finish the list yet

Regards,
Andrey

[1] https://mail.openjdk.java.net/pipermail/jdk8u-dev/2019-September/010237.html
[2] https://mail.openjdk.java.net/pipermail/jdk-updates-dev/2019-December/002273.html

> On 4 Jan 2020, at 11:03, Aleksey Shipilev <shade at redhat.com> wrote:
> 
> Hi,
> 
> What is the status for these? Are we having them in 8u-jfr-incubator, or? I do not see the pushes
> here: http://hg.openjdk.java.net/jdk8u/jdk8u-jfr-incubator/hotspot, for example for 8215727.
> 
> On 9/10/19 2:50 PM, Andrey Petushkov wrote:
>> Thank you. We'll take care of it then.
>> The list of backports we're currently working on (for jdk8u incubator)
>> was part of initial email. For convenience please find it below:
>> 
>> https://bugs.openjdk.java.net/browse/JDK-8185525: Add JFR event for DictionarySizes
>> https://bugs.openjdk.java.net/browse/JDK-8213448: [TESTBUG] enhance jfr/jvm/TestDumpOnCrash
>> https://bugs.openjdk.java.net/browse/JDK-8215727: Restore JFR thread sampler loop to old / previous behavior
>> https://bugs.openjdk.java.net/browse/JDK-8216283: Allow shorter method sampling interval than 10 ms
>> https://bugs.openjdk.java.net/browse/JDK-8217362: Emergency dump does not work when disk=false is set
>> https://bugs.openjdk.java.net/browse/JDK-8219241: Provide basic virtualization related info in the hs_error file on linux/windows x86_64
>> https://bugs.openjdk.java.net/browse/JDK-8219566: JFR did not collect call stacks when MaxJavaStackTraceDepth is set to zero
>> https://bugs.openjdk.java.net/browse/JDK-8219997: [TESTBUG] Create test for JFR events in Docker container: CPU, Memory and Process Info
>> https://bugs.openjdk.java.net/browse/JDK-8220293: Deadlock in JFR string pool
>> https://bugs.openjdk.java.net/browse/JDK-8220555: JFR tool shows potentially misleading message when it cannot access a file
>> https://bugs.openjdk.java.net/browse/JDK-8220657: JFR.dump does not work when filename is set
>> https://bugs.openjdk.java.net/browse/JDK-8221569: JFR tool produces incorrect output when both --categories and --events are specified
>> https://bugs.openjdk.java.net/browse/JDK-8221711: [TESTBUG] create more tests for JFR in container environment
>> https://bugs.openjdk.java.net/browse/JDK-8222888: [TESTBUG] docker/TestJFREvents.java fails due to "RuntimeException: JAVA_MAIN_CLASS_ is not defined"
>> https://bugs.openjdk.java.net/browse/JDK-8223438: add VirtualizationInformation JFR event
>> https://bugs.openjdk.java.net/browse/JDK-8223599: minimal build fails after JDK-8185525
>> https://bugs.openjdk.java.net/browse/JDK-8224217: RecordingInfo should use textual representation of path
>> https://bugs.openjdk.java.net/browse/JDK-8225310: JFR crashed in JfrPeriodicEventSet::requestProtectionDomainCacheTableStatistics()
> 
> 
> --
> Thanks,
> -Aleksey
>