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https://issues.apache.org/jira/browse/CASSANDRA-16097?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17244328#comment-17244328
 ] 

Caleb Rackliffe commented on CASSANDRA-16097:
---------------------------------------------

bq. I'm wondering if it's even worth keeping the test, in light of the one 
Caleb created. Please let me know if anyone has thoughts on that, or anything 
else in the current commit.

Take a look at {{CommitLogStressTest}}. In this case, we seem to have simply 
throw {{@Ignore}} on the test class and kept it around. We could do something 
similar here if we think the test constitutes an interesting scenario that we 
don't want to just lose completely.

> DigestResolver.getData throws AssertionError since dataResponse is null
> -----------------------------------------------------------------------
>
>                 Key: CASSANDRA-16097
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-16097
>             Project: Cassandra
>          Issue Type: Bug
>          Components: Consistency/Coordination
>            Reporter: David Capwell
>            Assignee: Adam Holmberg
>            Priority: Normal
>             Fix For: 4.0-beta
>
>
> Was running a benchmark at LOCAL_ONE and eventually saw the below exception
> {code}
> 2020-09-02 21:08:59,872 ERROR [Native-Transport-Requests-35] 
> org.apache.cassandra.transport.Message - Unexpected exception during request; 
> channel = [id: 0x13bb89d4, L:/10.14.92.74:9042 - R:/10.14.89.248:47112]
> java.lang.AssertionError
>        at 
> org.apache.cassandra.service.reads.DigestResolver.getData(DigestResolver.java:77)
>  ~[apache-cassandra-4.0.0-beta3.jar:4.0.0-beta3]
>        at 
> org.apache.cassandra.service.reads.AbstractReadExecutor.awaitResponses(AbstractReadExecutor.java:390)
>  ~[apache-cassandra-4.0.0-beta3.jar:4.0.0-beta3]
>        at 
> org.apache.cassandra.service.StorageProxy.fetchRows(StorageProxy.java:1821) 
> ~[apache-cassandra-4.0.0-beta3.jar:4.0.0-beta3]
>        at 
> org.apache.cassandra.service.StorageProxy.readRegular(StorageProxy.java:1711) 
> ~[apache-cassandra-4.0.0-beta3.jar:4.0.0-beta3]
>        at 
> org.apache.cassandra.service.StorageProxy.read(StorageProxy.java:1628) 
> ~[apache-cassandra-4.0.0-beta3.jar:4.0.0-beta3]
>        at 
> org.apache.cassandra.db.SinglePartitionReadCommand$Group.execute(SinglePartitionReadCommand.java:1097)
>  ~[apache-cassandra-4.0.0-beta3.jar:4.0.0-beta3]
>        at 
> org.apache.cassandra.cql3.statements.SelectStatement.execute(SelectStatement.java:294)
>  ~[apache-cassandra-4.0.0-beta3.jar:4.0.0-beta3]
>        at 
> org.apache.cassandra.cql3.statements.SelectStatement.execute(SelectStatement.java:246)
>  ~[apache-cassandra-4.0.0-beta3.jar:4.0.0-beta3]
>        at 
> org.apache.cassandra.cql3.statements.SelectStatement.execute(SelectStatement.java:88)
>  ~[apache-cassandra-4.0.0-beta3.jar:4.0.0-beta3]
>        at 
> org.apache.cassandra.cql3.QueryProcessor.processStatement(QueryProcessor.java:216)
>  ~[apache-cassandra-4.0.0-beta3.jar:4.0.0-beta3]
>        at 
> org.apache.cassandra.cql3.QueryProcessor.processPrepared(QueryProcessor.java:498)
>  ~[apache-cassandra-4.0.0-beta3.jar:4.0.0-beta3]
>        at 
> org.apache.cassandra.cql3.QueryProcessor.processPrepared(QueryProcessor.java:476)
>  ~[apache-cassandra-4.0.0-beta3.jar:4.0.0-beta3]
>        at 
> org.apache.cassandra.transport.messages.ExecuteMessage.execute(ExecuteMessage.java:138)
>  ~[apache-cassandra-4.0.0-beta3.jar:4.0.0-beta3]
>        at 
> org.apache.cassandra.transport.Message$Request.execute(Message.java:253) 
> ~[apache-cassandra-4.0.0-beta3.jar:4.0.0-beta3]
>        at 
> org.apache.cassandra.transport.Message$Dispatcher.processRequest(Message.java:725)
>  ~[apache-cassandra-4.0.0-beta3.jar:4.0.0-beta3]
>        at 
> org.apache.cassandra.transport.Message$Dispatcher.lambda$channelRead0$0(Message.java:630)
>  ~[apache-cassandra-4.0.0-beta3.jar:4.0.0-beta3]
>        at 
> java.base/java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:515)
>  [?:?]
>        at 
> org.apache.cassandra.concurrent.AbstractLocalAwareExecutorService$FutureTask.run(AbstractLocalAwareExecutorService.java:162)
>  [apache-cassandra-4.0.0-beta3.jar:4.0.0-beta3]
>        at org.apache.cassandra.concurrent.SEPWorker.run(SEPWorker.java:119) 
> [apache-cassandra-4.0.0-beta3.jar:4.0.0-beta3]
>        at 
> io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30)
>  [netty-all-4.1.50.Final.jar:4.1.50.Final]
>        at java.base/java.lang.Thread.run(Thread.java:834) [?:?]
> {code}
> This exception was not frequent, out of the whole run (3h) only saw this 
> twice.



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