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https://issues.apache.org/jira/browse/CASSANDRA-16097?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17244306#comment-17244306
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Adam Holmberg commented on CASSANDRA-16097:
-------------------------------------------
Branch is updated. I think I've addressed all comments.
In my original test I reduced the number of iterations to a number that creates
a handful of failures almost every time against trunk. It runs in about 10s.
I'm not sure if runtime was the only concern, but now 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.
> 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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