Jens Bannmann created CASSANDRA-14087:
-----------------------------------------
Summary: NPE when CAS encounters empty frozen collection
Key: CASSANDRA-14087
URL: https://issues.apache.org/jira/browse/CASSANDRA-14087
Project: Cassandra
Issue Type: Bug
Reporter: Jens Bannmann
When a compare-and-set operation specifying an equality criterion with a
non-{{null}} value encounters an empty collection ({{null}} cell), the server
throws a {{NullPointerException}} and the query fails.
This does not happen for non-frozen collections.
There's a self-contained test case at
[github|https://github.com/incub8/cassandra-npe-in-cas].
The stack trace for 3.11.0 is:
{code}
ERROR [Native-Transport-Requests-1] 2017-11-27 12:59:26,924
QueryMessage.java:129 - Unexpected error during query
java.lang.NullPointerException: null
at
org.apache.cassandra.cql3.ColumnCondition$CollectionBound.appliesTo(ColumnCondition.java:546)
~[apache-cassandra-3.11.0.jar:3.11.0]
at
org.apache.cassandra.cql3.statements.CQL3CasRequest$ColumnsConditions.appliesTo(CQL3CasRequest.java:324)
~[apache-cassandra-3.11.0.jar:3.11.0]
at
org.apache.cassandra.cql3.statements.CQL3CasRequest.appliesTo(CQL3CasRequest.java:210)
~[apache-cassandra-3.11.0.jar:3.11.0]
at org.apache.cassandra.service.StorageProxy.cas(StorageProxy.java:265)
~[apache-cassandra-3.11.0.jar:3.11.0]
at
org.apache.cassandra.cql3.statements.ModificationStatement.executeWithCondition(ModificationStatement.java:441)
~[apache-cassandra-3.11.0.jar:3.11.0]
at
org.apache.cassandra.cql3.statements.ModificationStatement.execute(ModificationStatement.java:416)
~[apache-cassandra-3.11.0.jar:3.11.0]
at
org.apache.cassandra.cql3.QueryProcessor.processStatement(QueryProcessor.java:217)
~[apache-cassandra-3.11.0.jar:3.11.0]
at
org.apache.cassandra.cql3.QueryProcessor.process(QueryProcessor.java:248)
~[apache-cassandra-3.11.0.jar:3.11.0]
at
org.apache.cassandra.cql3.QueryProcessor.process(QueryProcessor.java:233)
~[apache-cassandra-3.11.0.jar:3.11.0]
at
org.apache.cassandra.transport.messages.QueryMessage.execute(QueryMessage.java:116)
~[apache-cassandra-3.11.0.jar:3.11.0]
at
org.apache.cassandra.transport.Message$Dispatcher.channelRead0(Message.java:517)
[apache-cassandra-3.11.0.jar:3.11.0]
at
org.apache.cassandra.transport.Message$Dispatcher.channelRead0(Message.java:410)
[apache-cassandra-3.11.0.jar:3.11.0]
at
io.netty.channel.SimpleChannelInboundHandler.channelRead(SimpleChannelInboundHandler.java:105)
[netty-all-4.0.44.Final.jar:4.0.44.Final]
at
io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:357)
[netty-all-4.0.44.Final.jar:4.0.44.Final]
at
io.netty.channel.AbstractChannelHandlerContext.access$600(AbstractChannelHandlerContext.java:35)
[netty-all-4.0.44.Final.jar:4.0.44.Final]
at
io.netty.channel.AbstractChannelHandlerContext$7.run(AbstractChannelHandlerContext.java:348)
[netty-all-4.0.44.Final.jar:4.0.44.Final]
at
java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
[na:1.8.0_151]
at
org.apache.cassandra.concurrent.AbstractLocalAwareExecutorService$FutureTask.run(AbstractLocalAwareExecutorService.java:162)
[apache-cassandra-3.11.0.jar:3.11.0]
at org.apache.cassandra.concurrent.SEPWorker.run(SEPWorker.java:109)
[apache-cassandra-3.11.0.jar:3.11.0]
at java.lang.Thread.run(Thread.java:748) [na:1.8.0_151]
{code}
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