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https://issues.apache.org/jira/browse/CASSANDRA-16097?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17244307#comment-17244307
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David Capwell commented on CASSANDRA-16097:
-------------------------------------------
thanks for the update; running the new tests in a loop to make sure stable.
Will try to look at the changes closer within an hour or so.
> 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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