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https://issues.apache.org/jira/browse/CASSANDRA-10630?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14984039#comment-14984039
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Brice Figureau commented on CASSANDRA-10630:
--------------------------------------------
Looking at the code in the cassandra-2.1 branch there's now a guard code {{if
(firstCell == null)}} in {{RangeSliceQueryPager.containsPreviousLast}}, so this
is certainly a duplicate.
> NullPointerException in DeletionInfo.isDeleted
> ----------------------------------------------
>
> Key: CASSANDRA-10630
> URL: https://issues.apache.org/jira/browse/CASSANDRA-10630
> Project: Cassandra
> Issue Type: Bug
> Components: CQL
> Environment: Linux 64 bits
> Reporter: Brice Figureau
>
> The following CQL query:
> {code:sql}
> select count(*) from messages;
> {code}
> sometimes produces the following stack trace:
> {code}
> ERROR [SharedPool-Worker-1] 2015-10-31 16:32:22,606 ErrorMessage.java:251 -
> Unexpected exception during request
> java.lang.NullPointerException: null
> at
> org.apache.cassandra.db.DeletionInfo.isDeleted(DeletionInfo.java:138)
> ~[apache-cassandra-2.1.11.jar:2.1.11]
> at
> org.apache.cassandra.service.pager.RangeSliceQueryPager.containsPreviousLast(RangeSliceQueryPager.java:102)
> ~[apache-cassandra-2.1.11.jar:2.1.11]
> at
> org.apache.cassandra.service.pager.AbstractQueryPager.fetchPage(AbstractQueryPager.java:119)
> ~[apache-cassandra-2.1.11.jar:2.1.11]
> at
> org.apache.cassandra.service.pager.RangeSliceQueryPager.fetchPage(RangeSliceQueryPager.java:39)
> ~[apache-cassandra-2.1.11.jar:2.1.11]
> at
> org.apache.cassandra.cql3.statements.SelectStatement.pageCountQuery(SelectStatement.java:286)
> ~[apache-cassandra-2.1.11.jar:2.1.11]
> at
> org.apache.cassandra.cql3.statements.SelectStatement.execute(SelectStatement.java:230)
> ~[apache-cassandra-2.1.11.jar:2.1.11]
> at
> org.apache.cassandra.cql3.statements.SelectStatement.execute(SelectStatement.java:67)
> ~[apache-cassandra-2.1.11.jar:2.1.11]
> at
> org.apache.cassandra.cql3.QueryProcessor.processStatement(QueryProcessor.java:238)
> ~[apache-cassandra-2.1.11.jar:2.1.11]
> at
> org.apache.cassandra.cql3.QueryProcessor.process(QueryProcessor.java:260)
> ~[apache-cassandra-2.1.11.jar:2.1.11]
> at
> org.apache.cassandra.transport.messages.QueryMessage.execute(QueryMessage.java:122)
> ~[apache-cassandra-2.1.11.jar:2.1.11]
> at
> org.apache.cassandra.transport.Message$Dispatcher.channelRead0(Message.java:439)
> [apache-cassandra-2.1.11.jar:2.1.11]
> at
> org.apache.cassandra.transport.Message$Dispatcher.channelRead0(Message.java:335)
> [apache-cassandra-2.1.11.jar:2.1.11]
> at
> io.netty.channel.SimpleChannelInboundHandler.channelRead(SimpleChannelInboundHandler.java:105)
> [netty-all-4.0.23.Final.jar:4.0.23.Final]
> at
> io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:333)
> [netty-all-4.0.23.Final.jar:4.0.23.Final]
> at
> io.netty.channel.AbstractChannelHandlerContext.access$700(AbstractChannelHandlerContext.java:32)
> [netty-all-4.0.23.Final.jar:4.0.23.Final]
> at
> io.netty.channel.AbstractChannelHandlerContext$8.run(AbstractChannelHandlerContext.java:324)
> [netty-all-4.0.23.Final.jar:4.0.23.Final]
> at
> java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
> [na:1.8.0_51]
> at
> org.apache.cassandra.concurrent.AbstractTracingAwareExecutorService$FutureTask.run(AbstractTracingAwareExecutorService.java:164)
> [apache-cassandra-2.1.11.jar:2.1.11]
> at org.apache.cassandra.concurrent.SEPWorker.run(SEPWorker.java:105)
> [apache-cassandra-2.1.11.jar:2.1.11]
> at java.lang.Thread.run(Thread.java:745) [na:1.8.0_51]
> {code}
> After taking a snapshot on all participating nodes, the query starts to
> apparently succeed.
> The table schema is:
> {code:sql}
> CREATE TABLE akka.messages (
> persistence_id text,
> partition_nr bigint,
> sequence_nr bigint,
> message blob,
> used boolean static,
> PRIMARY KEY ((persistence_id, partition_nr), sequence_nr)
> ) WITH CLUSTERING ORDER BY (sequence_nr ASC)
> AND bloom_filter_fp_chance = 0.01
> AND caching = '{"keys":"ALL", "rows_per_partition":"NONE"}'
> AND comment = ''
> AND compaction = {'class':
> 'org.apache.cassandra.db.compaction.SizeTieredCompactionStrategy'}
> AND compression = {'sstable_compression':
> 'org.apache.cassandra.io.compress.LZ4Compressor'}
> AND dclocal_read_repair_chance = 0.1
> AND default_time_to_live = 0
> AND gc_grace_seconds = 864000
> AND max_index_interval = 2048
> AND memtable_flush_period_in_ms = 0
> AND min_index_interval = 128
> AND read_repair_chance = 0.0
> AND speculative_retry = '99.0PERCENTILE';
> {code}
> (this is from the [Akka Cassandra Persistence journal
> plugin|https://github.com/krasserm/akka-persistence-cassandra])
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