Hi, At one point there were a couple of issues related to catch cleanup. These were all fixed by https://bugs.openjdk.java.net/browse/JDK-8230565, which was backported to 13.0.2 and will be released next month. In the mean time, a workaround could be to exclude the offending method(s) from being compiled by C2. Depending on what you're doing, another option might be to use the latest JDK 14-ea build. cheers, Per On 12/12/19 2:44 AM, Sundara Mohan M wrote:
Hi, I was trying JVM 13.0.1+9 with ZGC and observing this crash
Host: Intel(R) Xeon(R) CPU E5-2680 v3 @ 2.50GHz, 48 cores, 125G, Red Hat Enterprise Linux Server release 6.10 (Santiago) Time: Wed Dec 11 05:41:55 2019 UTC elapsed time: 34571 seconds (0d 9h 36m 11s)
--------------- T H R E A D ---------------
Current thread (0x00007f6ab016e5b0): JavaThread "C2 CompilerThread0" daemon [_thread_in_native, id=48663, stack(0x00007f67b55a7000,0x00007f67b56a8000)]
Current CompileTask: C2:34571629 42982 ! 4 net.htmlparser.jericho.Attributes::construct (1337 bytes)
Stack: [0x00007f67b55a7000,0x00007f67b56a8000], sp=0x00007f67b56a3330, free space=1008k Native frames: (J=compiled Java code, A=aot compiled Java code, j=interpreted, Vv=VM code, C=native code) V [libjvm.so+0xab4d83] PhaseCFG::call_catch_cleanup(Block*)+0xa3 V [libjvm.so+0x80aadf] PhaseCFG::global_code_motion()+0x8bf V [libjvm.so+0x80ae7a] PhaseCFG::do_global_code_motion()+0x4a V [libjvm.so+0x634c95] Compile::Code_Gen()+0x1d5 V [libjvm.so+0x6386a0] Compile::Compile(ciEnv*, C2Compiler*, ciMethod*, int, bool, bool, bool, DirectiveSet*)+0xdc0 V [libjvm.so+0x55fadc] C2Compiler::compile_method(ciEnv*, ciMethod*, int, DirectiveSet*)+0xbc V [libjvm.so+0x64229d] CompileBroker::invoke_compiler_on_method(CompileTask*)+0x3fd V [libjvm.so+0x643c70] CompileBroker::compiler_thread_loop()+0x5d0 V [libjvm.so+0xf6b9fe] JavaThread::thread_main_inner()+0x1be V [libjvm.so+0xf707fd] Thread::call_run()+0x10d V [libjvm.so+0xc875b7] thread_native_entry(Thread*)+0xe7
...
Came across this bug https://bugs.openjdk.java.net/browse/JDK-8225509
Seeing this frequently with 13.0.1+9 JVM. Assuming this is specific to ZGC 1. Can someone give more info when this can happen? 2. Since 13.0.2 is targeted for Jan 2020, is there a workaround to fix this in 13.0.1?
Thanks Sundar