Strange bug inside jetty at shenandoah/jdk8u

[Aleksey Shipilev]

On 12/20/2017 08:14 PM, Kirill A. Korinsky wrote:
>> On 20 Dec 2017, at 20:16, Kirill A. Korinsky <kirill at korins.ky <mailto:kirill at korins.ky>> wrote:
>> Hey,
>>
>> I made very simple test case: https://github.com/catap/jetty-shenandoah-error
>>
>> It is durty but it is good enough.
>>
>> How to reproduce:
>> The first terminal:
>>> mvn clean package 
>>> docker-compose up --build
>> The second terminal:
>>> ab -k -c 1 -n 10000 -p request_body http://localhost:8080/test/
>>
>> and you should have a lot of errors likes:
>>> server_1  | 2017-12-20 16:09:56.287:WARN:oejh.HttpParser:qtp1706377736-41: parse exception:
>>> java.lang.IndexOutOfBoundsException: 20 for HttpChannelOverHttp at 1138214c{r=4,c=false,a=IDLE,uri=null}

Many thanks! I have successfully reproduced the failure locally with your docker-compose thing that
brings in Fedora 27 OpenJDK build.

It seems the exact Jetty version is important. Based on your example, minimized this further to
non-dockerized version:
  https://github.com/shipilev/jetty-test

It seems to be the bug in Shenandoah+C1, because -Xint works fine, and -XX:-TieredCompilation works
fine. All recent versions: sh/jdk8u, sh/jdk9, sh/jdk10 fail -- which is a good sign, and it
simplifies the bug hunt.

Thanks,
-Aleksey