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https://issues.apache.org/jira/browse/CASSANDRA-15981?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17170478#comment-17170478
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Jon Meredith commented on CASSANDRA-15981:
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LGTM
I reproduced the SEGV on my laptop against a commit I know fails (
43c19878e38fbe260f9e6143aa43836e85cf2f44) then cherry-picked the patch on top
and ran 140 iterations without failure.
Checked the process arguments
Under J11 - you can see {{-CMSClassUnloadingEnabled}}
{code}
-Dstorage-config=<path>/test/conf -Djava.awt.headless=true
-javaagent:<path>/lib/jamm-0.3.2.jar -ea -Djava.io.tmpdir=<path>
-Dcassandra.debugrefcount=true -Xss256k -XX:SoftRefLRUPolicyMSPerMB=0
-Dcassandra.memtable_row_overhead_computation_step=100
-Dcassandra.test.use_prepared=true -Dcassandra.test.offsetseed=0
-Dcassandra.test.sstableformatdevelopment=true
-Djava.security.egd=file:/dev/urandom -Dcassandra.testtag=
-Dcassandra.keepBriefBrief=true -Dcassandra.strict.runtime.checks=true
-Djdk.attach.allowAttachSelf=true -XX:+UseConcMarkSweepGC
-XX:+CMSParallelRemarkEnabled -XX:SurvivorRatio=8 -XX:MaxTenuringThreshold=1
-XX:CMSInitiatingOccupancyFraction=75 -XX:+UseCMSInitiatingOccupancyOnly
-XX:CMSWaitDuration=10000 -XX:+CMSParallelInitialMarkEnabled
-XX:+CMSEdenChunksRecordAlways --add-exports
java.base/jdk.internal.misc=ALL-UNNAMED --add-exports
java.base/jdk.internal.ref=ALL-UNNAMED --add-exports
java.base/sun.nio.ch=ALL-UNNAMED --add-exports
java.management.rmi/com.sun.jmx.remote.internal.rmi=ALL-UNNAMED --add-exports
java.rmi/sun.rmi.registry=ALL-UNNAMED --add-exports
java.rmi/sun.rmi.server=ALL-UNNAMED --add-exports java.sql/java.sql=ALL-UNNAMED
--add-opens java.base/java.lang.module=ALL-UNNAMED --add-opens
java.base/java.net=ALL-UNNAMED --add-opens
java.base/jdk.internal.loader=ALL-UNNAMED --add-opens
java.base/jdk.internal.ref=ALL-UNNAMED --add-opens
java.base/jdk.internal.reflect=ALL-UNNAMED --add-opens
java.base/jdk.internal.math=ALL-UNNAMED --add-opens
java.base/jdk.internal.module=ALL-UNNAMED --add-opens
java.base/jdk.internal.util.jar=ALL-UNNAMED --add-opens
jdk.management/com.sun.management.internal=ALL-UNNAMED -DQT_SHRINKS=0
-XX:-CMSClassUnloadingEnabled
-Dlegacy-sstable-root=<path>/test/data/legacy-sstables
-Dinvalid-legacy-sstable-root=<path>/test/data/invalid-legacy-sstables
-Dcassandra.ring_delay_ms=1000 -Dcassandra.tolerate_sstable_size=true
-Dcassandra.config.loader=org.apache.cassandra.OffsetAwareConfigurationLoader
-Dcassandra.skip_sync=true -Xmx1024m
{code}
Under J8 - and has {{-XX:MaxMetaspaceExpansion=64M -XX:MaxMetaspaceSize=512M
-XX:MetaspaceSize=128M}}
{code}
-Dstorage-config=<path>/test/conf -Djava.awt.headless=true
-javaagent:<path>/lib/jamm-0.3.2.jar -ea -Djava.io.tmpdir=<path>
-Dcassandra.debugrefcount=true -Xss256k -XX:SoftRefLRUPolicyMSPerMB=0
-Dcassandra.memtable_row_overhead_computation_step=100
-Dcassandra.test.use_prepared=true -Dcassandra.test.offsetseed=0
-Dcassandra.test.sstableformatdevelopment=true
-Djava.security.egd=file:/dev/urandom -Dcassandra.testtag=
-Dcassandra.keepBriefBrief=true -Dcassandra.strict.runtime.checks=true
-DQT_SHRINKS=0 -XX:MaxMetaspaceExpansion=64M -XX:MaxMetaspaceSize=512M
-XX:MetaspaceSize=128M -Dlegacy-sstable-root=<path>/test/data/legacy-sstables
-Dinvalid-legacy-sstable-root=<path>/test/data/invalid-legacy-sstables
-Dcassandra.ring_delay_ms=1000 -Dcassandra.tolerate_sstable_size=true
-Dcassandra.config.loader=org.apache.cassandra.OffsetAwareConfigurationLoader
-Dcassandra.skip_sync=true -Xmx1024m
{code}
> jvm-dtests crash on java 11
> ---------------------------
>
> Key: CASSANDRA-15981
> URL: https://issues.apache.org/jira/browse/CASSANDRA-15981
> Project: Cassandra
> Issue Type: Bug
> Components: Build
> Reporter: David Capwell
> Assignee: David Capwell
> Priority: Normal
> Fix For: 4.0-beta
>
>
> There is a race condition bug with CMS and class unloading which cause the
> JVM to crash. Since jvm-dtests rely on class loaders and unloading, this
> causes sporadic JVM crashes that look like the following in CI logs
> {code}
> junit.framework.AssertionFailedError: Forked Java VM exited abnormally.
> Please note the time in the report does not reflect the time until the VM
> exit.
> at jdk.internal.reflect.GeneratedMethodAccessor4.invoke(Unknown Source)
> at
> java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
> at java.base/java.util.Vector.forEach(Vector.java:1387)
> at jdk.internal.reflect.GeneratedMethodAccessor4.invoke(Unknown Source)
> at
> java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
> at jdk.internal.reflect.GeneratedMethodAccessor4.invoke(Unknown Source)
> at
> java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
> at java.base/java.util.Vector.forEach(Vector.java:1387)
> at jdk.internal.reflect.GeneratedMethodAccessor4.invoke(Unknown Source)
> at
> java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
> at
> java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> at
> java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
> at
> java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
> at java.base/java.lang.Thread.run(Thread.java:834)
> {code}
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