The following test failed in the JDK15 CI:
gc/stress/TestStressRSetCoarsening.java
Here's a snippet from the log file:
[255.363s][info][gc,marking ] GC(26) Concurrent Cleanup for Next Mark 4.548ms
[255.363s][info][gc ] GC(26) Concurrent Cycle 3227.583ms
%% step 6 out of 10 (~33% done)
%% 0 --> 256
# To suppress the following error report, specify this argument
# after -XX: or in .hotspotrc: SuppressErrorAt=/iterator.inline.hpp:64
#
# A fatal error has been detected by the Java Runtime Environment:
#
# Internal Error (/opt/mach5/mesos/work_dir/slaves/63712a43-4eaa-429c-95b4-483ac8241123-S860/frameworks/1735e8a2-a1db-478c-8104-60c8b0af87dd-0196/executors/9e8df6e9-21d2-4c06-8d7e-1b17432784b2/runs/3267fa51-3d98-461f-9976-313a3b4f9ddb/workspace/open/src/hotspot/share/memory/iterator.inline.hpp:64), pid=24833, tid=25113
# assert(Universe::heap()->is_in(o)) failed: should be in closed *p 0x00000000f99b22f8 0x00000000eb610e30
#
# JRE version: Java(TM) SE Runtime Environment (15.0+27) (fastdebug build 15-ea+27-1323)
# Java VM: Java HotSpot(TM) 64-Bit Server VM (fastdebug 15-ea+27-1323, compiled mode, sharing, compressed oops, g1 gc, linux-amd64)
# Problematic frame:
# V [libjvm.so+0xac1487] void OopIterateClosure::verify<unsigned int>(unsigned int*) [clone .part.0]+0x87
#
# Core dump will be written. Default location: Core dumps may be processed with "/opt/core.sh %p" (or dumping to /opt/mach5/mesos/work_dir/slaves/63712a43-4eaa-429c-95b4-483ac8241123-S873/frameworks/1735e8a2-a1db-478c-8104-60c8b0af87dd-0196/executors/fa638a3c-0739-487e-ba7c-3ea34e3f7e5c/runs/019afcc7-4659-4191-aa4a-c202c78beee9/testoutput/test-support/jtreg_open_test_hotspot_jtreg_hotspot_gc/scratch/0/core.24833)
#
Unsupported internal testing APIs have been used.
# An error report file with more information is saved as:
# /opt/mach5/mesos/work_dir/slaves/63712a43-4eaa-429c-95b4-483ac8241123-S873/frameworks/1735e8a2-a1db-478c-8104-60c8b0af87dd-0196/executors/fa638a3c-0739-487e-ba7c-3ea34e3f7e5c/runs/019afcc7-4659-4191-aa4a-c202c78beee9/testoutput/test-support/jtreg_open_test_hotspot_jtreg_hotspot_gc/scratch/0/hs_err_pid24833.log
#
# If you would like to submit a bug report, please visit:
# https://bugreport.java.com/bugreport/crash.jsp
#
----------System.err:(0/0)----------
----------rerun:(52/6528)*----------
Here's the crashing thread's stack:
--------------- T H R E A D ---------------
Current thread (0x00007f5da40110e0): ConcurrentGCThread "G1 Refine#3" [stack: 0x00007f5de6de4000,0x00007f5de6ee4000] [id=25113]
Stack: [0x00007f5de6de4000,0x00007f5de6ee4000], sp=0x00007f5de6ee29a0, free space=1018k
Native frames: (J=compiled Java code, A=aot compiled Java code, j=interpreted, Vv=VM code, C=native code)
V [libjvm.so+0xac1487] void OopIterateClosure::verify<unsigned int>(unsigned int*) [clone .part.0]+0x87
V [libjvm.so+0xb8199b] void OopOopIterateBoundedDispatch<G1ConcurrentRefineOopClosure>::Table::oop_oop_iterate_bounded<ObjArrayKlass, unsigned int>(G1ConcurrentRefineOopClosure*, oop, Klass*, MemRegion)+0xab
V [libjvm.so+0xb7e1d5] void oopDesc::oop_iterate<G1ConcurrentRefineOopClosure>(G1ConcurrentRefineOopClosure*, MemRegion)+0x65
V [libjvm.so+0xb7e71a] HeapWordImpl** HeapRegion::oops_on_memregion_seq_iterate_careful<false, G1ConcurrentRefineOopClosure>(MemRegion, G1ConcurrentRefineOopClosure*)+0x49a
V [libjvm.so+0xb759ea] G1RemSet::refine_card_concurrently(unsigned char*, unsigned int)+0xba
V [libjvm.so+0xb133d8] G1DirtyCardQueueSet::refine_buffer(BufferNode*, unsigned int, G1ConcurrentRefineStats*)+0x3d8
V [libjvm.so+0xb13acb] G1DirtyCardQueueSet::refine_completed_buffer_concurrently(unsigned int, unsigned long, G1ConcurrentRefineStats*)+0x6b
V [libjvm.so+0xb0e9be] G1ConcurrentRefine::do_refinement_step(unsigned int, G1ConcurrentRefineStats*)+0x37e
V [libjvm.so+0xb0fd76] G1ConcurrentRefineThread::run_service()+0x1b6
V [libjvm.so+0x94767b] ConcurrentGCThread::run()+0x2b
V [libjvm.so+0x16c33a0] Thread::call_run()+0x100
V [libjvm.so+0x13c64a6] thread_native_entry(Thread*)+0x116