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https://issues.apache.org/jira/browse/CASSANDRA-16750?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17365395#comment-17365395
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Berenguer Blasi commented on CASSANDRA-16750:
---------------------------------------------
CDC creates a hard link on {{CommitLogSegmentManagerCDC.createSegment()}} but
this happens in an async operation originating at
{{AbstractCommitLogSegmentManager.start()}}. We can see
[here|https://github.com/apache/cassandra/pull/1074/files#diff-b5c6007ec3a4b31965b4dc10e8c8c50766237f1ce8ac88011035b91215060fc8R51]
the test calls {{cleanup()}} just after staring the commit log service. This
can remove files from under the commit log's feet making the hardlinking fail.
We need to wait for completion.
> Flaky AlibabaCloudSnitchTest
> ----------------------------
>
> Key: CASSANDRA-16750
> URL: https://issues.apache.org/jira/browse/CASSANDRA-16750
> Project: Cassandra
> Issue Type: Bug
> Components: Test/unit
> Reporter: Berenguer Blasi
> Assignee: Berenguer Blasi
> Priority: Normal
> Fix For: 4.0-rc2, 4.0, 4.x
>
>
> Flaky test
> Test error
> {noformat}
> Error Message
> Forked Java VM exited abnormally. Please note the time in the report does not
> reflect the time until the VM exit.
> Stacktrace
> 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:1388)
> 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:1388)
> 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.util.Vector.forEach(Vector.java:1388)
> 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
> jdk.scripting.nashorn.scripts/jdk.nashorn.internal.scripts.Script$Recompilation$30$\^eval\_$cu1$restOf/0x00000008403db840.:program(<eval>:13)
> at
> jdk.scripting.nashorn/jdk.nashorn.internal.runtime.ScriptFunctionData.invoke(ScriptFunctionData.java:655)
> at
> jdk.scripting.nashorn/jdk.nashorn.internal.runtime.ScriptFunction.invoke(ScriptFunction.java:513)
> at
> jdk.scripting.nashorn/jdk.nashorn.internal.runtime.ScriptRuntime.apply(ScriptRuntime.java:527)
> at
> jdk.scripting.nashorn/jdk.nashorn.api.scripting.NashornScriptEngine.evalImpl(NashornScriptEngine.java:456)
> at
> jdk.scripting.nashorn/jdk.nashorn.api.scripting.NashornScriptEngine.evalImpl(NashornScriptEngine.java:413)
> at
> jdk.scripting.nashorn/jdk.nashorn.api.scripting.NashornScriptEngine.evalImpl(NashornScriptEngine.java:409)
> at
> jdk.scripting.nashorn/jdk.nashorn.api.scripting.NashornScriptEngine.eval(NashornScriptEngine.java:162)
> at
> java.scripting/javax.script.AbstractScriptEngine.eval(AbstractScriptEngine.java:264)
> 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:1388)
> 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)
> {noformat}
> Log error:
> {noformat}
> AlibabaCloudSnitchTest.BeforeFirstTest failure was
> ERROR [COMMIT-LOG-ALLOCATOR] 2021-06-05 00:41:36,750 Exiting due to error
> while processing commit log during initialization.
> java.lang.RuntimeException: Tried to hard link to file that does not exist
> build/test/cassandra/commitlog/CommitLog-7-1622853696662.log
> at
> org.apache.cassandra.io.util.FileUtils.createHardLink(FileUtils.java:184)
> at
> org.apache.cassandra.db.commitlog.CommitLogSegmentManagerCDC.createSegment(CommitLogSegmentManagerCDC.java:149)
> at
> org.apache.cassandra.db.commitlog.AbstractCommitLogSegmentManager$1.runMayThrow(AbstractCommitLogSegmentManager.java:115)
> at
> org.apache.cassandra.utils.WrappedRunnable.run(WrappedRunnable.java:28)
> at
> io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30)
> at java.lang.Thread.run(Thread.java:748)
> ref:
> https://nightlies.apache.org/cassandra/cassandra-4.0.0/Cassandra-4.0.0-test-cdc/6/Cassandra-4.0.0-test-cdc/jdk=jdk_1.8_latest,label=cassandra,split=6/build/test/logs/cdc/TEST-org.apache.cassandra.locator.AlibabaCloudSnitchTest.log.xz
> {noformat}
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