The following test failed in the JDK20 CI:

containers/docker/TestJFRNetworkEvents.java

Here's a snippet from the log file:

#section:driver
----------messages:(6/265)----------
command: driver TestJFRNetworkEvents
reason: User specified action: run driver TestJFRNetworkEvents
Mode: agentvm
Agent id: 7
Additional exports to unnamed modules from @modules: java.base/jdk.internal.misc jdk.jartool/sun.tools.jar
elapsed time (seconds): 17.081
----------configuration:(18/2178)----------

<snip>

----------System.out:(160/7600)----------
Test Environment: detected availableCPUs = 8
[COMMAND]
podman ps
[2022-08-06T07:49:24.850394316Z] Gathering output for process 3430173
[ELAPSED: 196 ms]
[STDERR]

[STDOUT]
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES

Full child process STDOUT was saved to docker-stdout-3430173.log
[2022-08-06T07:49:25.002942193Z] Waiting for completion for process 3430173
[2022-08-06T07:49:25.003098513Z] Waiting for completion finished for process 3430173
DockerfileConfig: using custom image name: jpg-data.us.oracle.com/docker-local/mach5/jdk-test/oraclelinux_8.5_aarch64
DockerfileConfig: using custom image version: 1.0
[COMMAND]
podman build --no-cache --tag jdk-internal:test-containers-docker-TestJFRNetworkEvents-jfr-network jdk-internal-test-containers-docker-TestJFRNetworkEvents-jfr-network
[2022-08-06T07:49:25.253812757Z] Gathering output for process 3430202
[ELAPSED: 4605 ms]
[STDERR]

[STDOUT]
STEP 1/4: FROM jpg-data.us.oracle.com/docker-local/mach5/jdk-test/oraclelinux_8.5_aarch64:1.0
STEP 2/4: COPY /jdk /jdk
--> 57c5e1e511a
STEP 3/4: ENV JAVA_HOME=/jdk
--> 4e7f9b098fa
STEP 4/4: CMD ["/bin/bash"]
COMMIT jdk-internal:test-containers-docker-TestJFRNetworkEvents-jfr-network
--> b86d2388d93
Successfully tagged localhost/jdk-internal:test-containers-docker-TestJFRNetworkEvents-jfr-network
b86d2388d938087a413a346831afb5f9a834ccd456b4efc5fe5915714357e1e0

Full child process STDOUT was saved to docker-stdout-3430202.log
[2022-08-06T07:49:29.857914986Z] Waiting for completion for process 3430202
[2022-08-06T07:49:29.858676347Z] Waiting for completion finished for process 3430202
[COMMAND]
podman run --tty=true --rm --volume /opt/mach5/mesos/work_dir/slaves/0c72054a-24ab-4dbb-944f-97f9341a1b96-S48905/frameworks/1735e8a2-a1db-478c-8104-60c8b0af87dd-0196/executors/4cb84b09-e361-4169-b33b-03a1d2ffaca2/runs/706cb247-6eed-40c5-a0c5-9a63f197c0d4/testoutput/test-support/jtreg_open_test_hotspot_jtreg_containers/classes/2/containers/docker/TestJFRNetworkEvents.d:/test-classes/ --hostname container-unique-8221711 jdk-internal:test-containers-docker-TestJFRNetworkEvents-jfr-network /jdk/bin/java -cp /test-classes/ -XX:MaxRAMPercentage=6.25 -Djava.io.tmpdir=/opt/mach5/mesos/work_dir/slaves/0c72054a-24ab-4dbb-944f-97f9341a1b96-S48905/frameworks/1735e8a2-a1db-478c-8104-60c8b0af87dd-0196/executors/4cb84b09-e361-4169-b33b-03a1d2ffaca2/runs/706cb247-6eed-40c5-a0c5-9a63f197c0d4/testoutput/test-support/jtreg_open_test_hotspot_jtreg_containers/tmp -Djdk.test.docker.image.name=jpg-data.us.oracle.com/docker-local/mach5/jdk-test/oraclelinux_8.5_aarch64 -Djdk.test.docker.image.version=1.0 -Djdk.test.container.command=podman JfrNetwork jdk.SocketWrite
[2022-08-06T07:49:29.866681718Z] Gathering output for process 3430333
[ELAPSED: 10929 ms]
[STDERR]

[STDOUT]
ServerSocker Local Address: 0.0.0.0/0.0.0.0:41353
SocketWriter(): sa = 0.0.0.0/0.0.0.0:41353
========= Recording event: jdk.SocketWrite
ServerSocketListener: accepted socket connection: s = Socket[addr=/10.0.2.100,port=35678,localport=41353]
event = jdk.SocketWrite {
  startTime = 07:49:31.365 (2022-08-06)
  duration = 0.288 ms
  host = "container-unique-8221711"
  address = "10.0.2.100"
  port = 41353
  bytesWritten = 1 byte
  eventThread = "Thread-1" (javaThreadId = 22)
}


event = jdk.SocketWrite {
  startTime = 07:49:31.367 (2022-08-06)
  duration = 0.119 ms
  host = "container-unique-8221711"
  address = "10.0.2.100"
  port = 41353
  bytesWritten = 1 byte
  eventThread = "Thread-1" (javaThreadId = 22)
}


event = jdk.SocketWrite {
  startTime = 07:49:31.367 (2022-08-06)
  duration = 0.0782 ms
  host = "container-unique-8221711"
  address = "10.0.2.100"
  port = 41353
  bytesWritten = 1 byte
  eventThread = "Thread-1" (javaThreadId = 22)
}


jfr_reported_container_hostname=container-unique-8221711
getLocalIp() returning:
container-unique-8221711
10.0.2.100
#
# A fatal error has been detected by the Java Runtime Environment:
#
# SIGBUS (0x7) at pc=0x0000fffea0763760, pid=1, tid=1
#
# JRE version: Java(TM) SE Runtime Environment (20.0+10) (fastdebug build 20-ea+10-540)
# Java VM: Java HotSpot(TM) 64-Bit Server VM (fastdebug 20-ea+10-540, mixed mode, sharing, tiered, compressed oops, compressed class ptrs, g1 gc, linux-aarch64)
# Problematic frame:
# V [libjvm.so+0x1793760] JVM_handle_linux_signal+0x240
#
# Core dump will be written. Default location: Core dumps may be processed with "/opt/core.sh %p" (or dumping to //core.1)
#
# Can not save log file, dump to screen..
#
# A fatal error has been detected by the Java Runtime Environment:
#
# SIGBUS (0x7) at pc=0x0000fffea0763760, pid=1, tid=1
#
# JRE version: Java(TM) SE Runtime Environment (20.0+10) (fastdebug build 20-ea+10-540)
# Java VM: Java HotSpot(TM) 64-Bit Server VM (fastdebug 20-ea+10-540, mixed mode, sharing, tiered, compressed oops, compressed class ptrs, g1 gc, linux-aarch64)
# Problematic frame:
# V [libjvm.so+0x1793760] JVM_handle_linux_signal+0x240
#
# Core dump will be written. Default location: Core dumps may be processed with "/opt/core.sh %p" (or dumping to //core.1)
#
# If you would like to submit a bug report, please visit:
# https://bugreport.java.com/bugreport/crash.jsp
#

--------------- S U M M A R Y ------------

Command Line: -XX:MaxRAMPercentage=6.25 -Djava.io.tmpdir=/opt/mach5/mesos/work_dir/slaves/0c72054a-24ab-4dbb-944f-97f9341a1b96-S48905/frameworks/1735e8a2-a1db-478c-8104-60c8b0af87dd-0196/executors/4cb84b09-e361-4169-b33b-03a1d2ffaca2/runs/706cb247-6eed-40c5-a0c5-9a63f197c0d4/testoutput/test-support/jtreg_open_test_hotspot_jtreg_containers/tmp -Djdk.test.docker.image.name=jpg-data.us.oracle.com/docker-local/mach5/jdk-test/oraclelinux_8.5_aarch64 -Djdk.test.docker.image.version=1.0 -Djdk.test.container.command=podman JfrNetwork jdk.SocketWrite

Host: <container-unique-NNNNNNN>, AArch64, 8 cores, 30G, Linux
Time: Sat Aug 6 07:49:32 2022 UTC elapsed time: 2.018871 seconds (0d 0h 0m 2s)

--------------- T H R E A D ---------------

Current thread is native thread

Stack: [0x0000ffffe0d40000,0x0000ffffe1540000], sp=0x0000ffffe153ae10, free space=8171k
Native frames: (J=compiled Java code, j=interpreted, Vv=VM code, C=native code)
V [libjvm.so+0x1793760] JVM_handle_linux_signal+0x240
C [linux-vdso.so.1+0x5d0] __kernel_rt_sigreturn+0x0
C [libc.so.6+0x353cc]
C [libc.so.6+0x3554c]
C [libc.so.6+0x20e68] __libc_start_main+0xe8


siginfo: si_signo: 7 (SIGBUS), si_code: 2 (BUS_ADRERR), si_addr: 0x0000fffea0aa06f0

This is a very different/strange failure. We have what looks like
the contents of an hs_err_pid file showing up in the test log, but
the test run artifacts don't have any hs_err_pid files.

Although this test is named TestJFRNetworkEvents.java, I'm
starting this bug off in hotspot/runtime since I don't see any
indicators of a JFR problem. This looks more like a container
problem...