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https://issues.apache.org/jira/browse/CASSANDRA-13482?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
 ]

Alex Petrov reassigned CASSANDRA-13482:
---------------------------------------

    Assignee: Alex Petrov

> NPE on non-existing row read when row cache is enabled
> ------------------------------------------------------
>
>                 Key: CASSANDRA-13482
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-13482
>             Project: Cassandra
>          Issue Type: Bug
>            Reporter: Alex Petrov
>            Assignee: Alex Petrov
>
> The problem is reproducible on 3.0 with:
> {code}
> -# row_cache_class_name: org.apache.cassandra.cache.OHCProvider
> +row_cache_class_name: org.apache.cassandra.cache.OHCProvider
> -row_cache_size_in_mb: 0
> +row_cache_size_in_mb: 100
> {code}
> Table setup:
> {code}
> CREATE TABLE cache_tables (pk int, v1 int, v2 int, v3 int, primary key (pk, 
> v1)) WITH CACHING = { 'keys': 'ALL', 'rows_per_partition': '1' } ;
> {code}
> No data is required, only a head query (or any pk/ck query but with full 
> partitions cached). 
> {code}
> select * from cross_page_queries where pk = 10000 ;
> {code}
> {code}
> java.lang.AssertionError: null
>         at 
> org.apache.cassandra.db.rows.UnfilteredRowIterators.concat(UnfilteredRowIterators.java:193)
>  ~[main/:na]
>         at 
> org.apache.cassandra.db.SinglePartitionReadCommand.getThroughCache(SinglePartitionReadCommand.java:461)
>  ~[main/:na]
>         at 
> org.apache.cassandra.db.SinglePartitionReadCommand.queryStorage(SinglePartitionReadCommand.java:358)
>  ~[main/:na]
>         at 
> org.apache.cassandra.db.ReadCommand.executeLocally(ReadCommand.java:395) 
> ~[main/:na]
>         at 
> org.apache.cassandra.service.StorageProxy$LocalReadRunnable.runMayThrow(StorageProxy.java:1794)
>  ~[main/:na]
>         at 
> org.apache.cassandra.service.StorageProxy$DroppableRunnable.run(StorageProxy.java:2472)
>  ~[main/:na]
>         at 
> java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) 
> ~[na:1.8.0_121]
>         at 
> org.apache.cassandra.concurrent.AbstractLocalAwareExecutorService$FutureTask.run(AbstractLocalAwareExecutorService.java:164)
>  ~[main/:na]
>         at 
> org.apache.cassandra.concurrent.AbstractLocalAwareExecutorService$LocalSessionFutureTask.run(AbstractLocalAwareExecutorService.java:136)
>  [main/:na]
>         at org.apache.cassandra.concurrent.SEPWorker.run(SEPWorker.java:105) 
> [main/:na]
>         at java.lang.Thread.run(Thread.java:745) [na:1.8.0_121]
> {code}



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