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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]) -- This message was sent by Atlassian JIRA (v6.3.4#6332)