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https://issues.apache.org/jira/browse/CASSANDRA-16582?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17318324#comment-17318324
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Brandon Williams edited comment on CASSANDRA-16582 at 4/12/21, 1:09 PM:
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was (Author: brandon.williams):
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> Groupby queries trigger ArrayIndexOutOfBoundsException on mixed version
> cluster
> -------------------------------------------------------------------------------
>
> Key: CASSANDRA-16582
> URL: https://issues.apache.org/jira/browse/CASSANDRA-16582
> Project: Cassandra
> Issue Type: Bug
> Components: Messaging/Internode
> Reporter: junwen yang
> Assignee: Adam Holmberg
> Priority: Normal
> Fix For: 4.0-beta
>
> Time Spent: 10m
> Remaining Estimate: 0h
>
> When I have a mixed cluster with C*3.10 and C*4.0-beta4, issuing GROUP BY
> query to 3.10 will trigger `java.lang.ArrayIndexOutOfBoundsException`.
> Reproduce:
> having a mixed cluster 3.10 and 4.0-beta4
>
> {code:java}
> // create keyspace and db
> cqlsh> CREATE KEYSPACE test WITH replication = {'class':'SimpleStrategy',
> 'replication_factor' : 1};
> cqlsh> use test;
> cqlsh:test> create table login_log ( user_id int, application_name text,
> primary key (user_id, application_name) ) with clustering order by
> (application_name asc);
> cqlsh:test> insert into login_log (user_id, application_name) VALUES(1,
> 'bash');cqlsh:test> insert into login_log (user_id, application_name)
> VALUES(1, 'chrome');
> // issue GROUP BY QUERY
> cqlsh:test> select user_id, application_name from login_log group by user_id,
> application_name;{code}
>
> The reason why the bug happens is that the Kind enum in DataLimits has
> changed from 6 values to 4 values:
>
> {code:java}
> [THRIFT_LIMIT, SUPER_COLUMN_COUNTING_LIMIT, CQL_GROUP_BY_LIMIT,
> CQL_GROUP_BY_PAGING_LIMIT]{code}
> {code:java}
> [CQL_LIMIT, CQL_PAGING_LIMIT, CQL_GROUP_BY_LIMIT, CQL_GROUP_BY_PAGING_LIMIT]
>
> {code}
> Thus when node 3.10 forwards the read command with CQL_GROUP_BY_LIMIT to node
> 4.0, it tries to read the value of index 4 in Kind which has only 4 elements,
> causing ArrayIndexOutOfBoundsException
> Log details:
> {code:java}
> ERROR [Messaging-EventLoop-3-5] 2021-04-09 00:27:14,899
> InboundMessageHandler.java:334 -
> /251.250.238.1:7000->/251.250.238.2:7000-LEGACY_MESSAGES-c356fde1 unexpected
> exception caught while deserializing a message
> java.lang.ArrayIndexOutOfBoundsException: 4
> at
> org.apache.cassandra.db.filter.DataLimits$Serializer.deserialize(DataLimits.java:1172)
> at
> org.apache.cassandra.db.ReadCommand$Serializer.deserialize(ReadCommand.java:1006)
> at
> org.apache.cassandra.db.ReadCommand$Serializer.deserialize(ReadCommand.java:909)
> at
> org.apache.cassandra.net.Message$Serializer.deserializePayloadPre40(Message.java:966)
> at
> org.apache.cassandra.net.Message$Serializer.deserializePre40(Message.java:947)
> at
> org.apache.cassandra.net.Message$Serializer.deserializePre40(Message.java:935)
> at
> org.apache.cassandra.net.Message$Serializer.deserialize(Message.java:635)
> at
> org.apache.cassandra.net.InboundMessageHandler.processSmallMessage(InboundMessageHandler.java:320)
> at
> org.apache.cassandra.net.InboundMessageHandler.processOneContainedMessage(InboundMessageHandler.java:303)
> at
> org.apache.cassandra.net.InboundMessageHandler.processFrameOfContainedMessages(InboundMessageHandler.java:270)
> at
> org.apache.cassandra.net.InboundMessageHandler.processIntactFrame(InboundMessageHandler.java:255)
> at
> org.apache.cassandra.net.InboundMessageHandler.process(InboundMessageHandler.java:246)
> at
> org.apache.cassandra.net.FrameDecoder.deliver(FrameDecoder.java:320)
> at
> org.apache.cassandra.net.FrameDecoder.channelRead(FrameDecoder.java:284)
> at
> org.apache.cassandra.net.FrameDecoder.channelRead(FrameDecoder.java:268)
> at
> io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:379)
> at
> io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:365)
> at
> io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:357)
> at
> io.netty.channel.DefaultChannelPipeline$HeadContext.channelRead(DefaultChannelPipeline.java:1410)
> at
> io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:379)
> at
> io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:365)
> at
> io.netty.channel.DefaultChannelPipeline.fireChannelRead(DefaultChannelPipeline.java:919)
> at
> io.netty.channel.epoll.AbstractEpollStreamChannel$EpollStreamUnsafe.epollInReady(AbstractEpollStreamChannel.java:792)
> at
> io.netty.channel.epoll.AbstractEpollChannel$AbstractEpollUnsafe$1.run(AbstractEpollChannel.java:387)
> at
> io.netty.util.concurrent.AbstractEventExecutor.safeExecute(AbstractEventExecutor.java:164)
> at
> io.netty.util.concurrent.SingleThreadEventExecutor.runAllTasks(SingleThreadEventExecutor.java:472)
> at io.netty.channel.epoll.EpollEventLoop.run(EpollEventLoop.java:384)
> at
> io.netty.util.concurrent.SingleThreadEventExecutor$4.run(SingleThreadEventExecutor.java:989)
> at
> io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74)
> at
> io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30)
> at java.lang.Thread.run(Thread.java:748)`
> {code}
>
>
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