RFR: 6744: Upgrading to Eclipse RCP 2020-03

[Jie Kang]

On Tue, 24 Mar 2020 16:41:11 GMT, Marcus Hirt <hirt at openjdk.org> wrote:

> Using 2020-03 as default. Removing 2019-09.

Built okay on Linux Fedora 30. However when running jmc against:
openjdk version "11.0.6" 2020-01-14
OpenJDK Runtime Environment 18.9 (build 11.0.6+10)
OpenJDK 64-Bit Server VM 18.9 (build 11.0.6+10, mixed mode, sharing)
I saw a crash. I had MXBean window of JMC itself and a flight recording window of JMC itself (last 5 minutes).
#
# A fatal error has been detected by the Java Runtime Environment:
#
#  SIGSEGV (0xb) at pc=0x00007f5daa42de54, pid=11529, tid=11547
#
# JRE version: OpenJDK Runtime Environment (11.0.6+10) (build 11.0.6+10)
# Java VM: OpenJDK 64-Bit Server VM (11.0.6+10, mixed mode, sharing, tiered, compressed oops, g1 gc, linux-amd64)
# Problematic frame:
# C  [libpthread.so.0+0xfe54]  pthread_getcpuclockid+0x4

I'm reporting this early here; maybe it's unrelated to updating to 2020-03. I'm going to investigate further, try to
reproduce and open an issue.

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PR: https://git.openjdk.java.net/jmc/pull/69