Alex Petrov created CASSANDRA-19866:
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             Summary: Fix Journal segment allocation/switch race condition
                 Key: CASSANDRA-19866
                 URL: https://issues.apache.org/jira/browse/CASSANDRA-19866
             Project: Cassandra
          Issue Type: Bug
          Components: Accord
            Reporter: Alex Petrov
            Assignee: Alex Petrov


Concurrent r/w workload is currently throwing:

java.lang.IllegalArgumentException: Can not reference segment 1724695101990
        at org.apache.cassandra.journal.Segments.isFlushed(Segments.java:189)
        at org.apache.cassandra.journal.Journal.isFlushed(Journal.java:199)
        at 
org.apache.cassandra.journal.Journal$FlusherCallbacks.submit(Journal.java:151)
        at org.apache.cassandra.journal.Journal.onFlush(Journal.java:204)
        at 
org.apache.cassandra.service.accord.AccordJournal.appendCommand(AccordJournal.java:264)
        at 
org.apache.cassandra.service.accord.AccordCommandStore.appendCommands(AccordCommandStore.java:579)
        at 
org.apache.cassandra.service.accord.async.AsyncOperation.runInternal(AsyncOperation.java:277)
        at 
org.apache.cassandra.service.accord.async.AsyncOperation.run(AsyncOperation.java:303)
        at 
org.apache.cassandra.service.accord.async.AsyncOperation.onLoaded(AsyncOperation.java:169)
        at 
accord.utils.async.AsyncCallbacks.lambda$inExecutorService$0(AsyncCallbacks.java:36)
        at 
org.apache.cassandra.concurrent.ExecutionFailure$1.run(ExecutionFailure.java:133)
        at 
java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)
        at 
java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)
        at 
io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30)
        at java.base/java.lang.Thread.run(Thread.java:829)




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