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Posted to commits@cassandra.apache.org by "Jeff Jirsa (JIRA)" <ji...@apache.org> on 2018/09/26 21:30:00 UTC
[jira] [Assigned] (CASSANDRA-14444) Got NPE when querying Cassandra
3.11.2
[ https://issues.apache.org/jira/browse/CASSANDRA-14444?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Jeff Jirsa reassigned CASSANDRA-14444:
--------------------------------------
Assignee: Xiaodong Xie
> Got NPE when querying Cassandra 3.11.2
> --------------------------------------
>
> Key: CASSANDRA-14444
> URL: https://issues.apache.org/jira/browse/CASSANDRA-14444
> Project: Cassandra
> Issue Type: Bug
> Components: CQL
> Environment: Ubuntu 14.04, JDK 1.8.0_171.
> Cassandra 3.11.2
> Reporter: Xiaodong Xie
> Assignee: Xiaodong Xie
> Priority: Blocker
> Labels: pull-request-available
> Fix For: 3.11.x
>
> Time Spent: 10m
> Remaining Estimate: 0h
>
> We just upgraded our Cassandra cluster from 2.2.6 to 3.11.2
> After upgrading, we immediately got exceptions in Cassandra like this one:
>
> {code}
> ERROR [Native-Transport-Requests-1] 2018-05-11 17:10:21,994 QueryMessage.java:129 - Unexpected error during query
> java.lang.NullPointerException: null
> at org.apache.cassandra.dht.RandomPartitioner.getToken(RandomPartitioner.java:248) ~[apache-cassandra-3.11.2.jar:3.11.2]
> at org.apache.cassandra.dht.RandomPartitioner.decorateKey(RandomPartitioner.java:92) ~[apache-cassandra-3.11.2.jar:3.11.2]
> at org.apache.cassandra.config.CFMetaData.decorateKey(CFMetaData.java:666) ~[apache-cassandra-3.11.2.jar:3.11.2]
> at org.apache.cassandra.service.pager.PartitionRangeQueryPager.<init>(PartitionRangeQueryPager.java:44) ~[apache-cassandra-3.11.2.jar:3.11.2]
> at org.apache.cassandra.db.PartitionRangeReadCommand.getPager(PartitionRangeReadCommand.java:268) ~[apache-cassandra-3.11.2.jar:3.11.2]
> at org.apache.cassandra.cql3.statements.SelectStatement.getPager(SelectStatement.java:475) ~[apache-cassandra-3.11.2.jar:3.11.2]
> at org.apache.cassandra.cql3.statements.SelectStatement.execute(SelectStatement.java:288) ~[apache-cassandra-3.11.2.jar:3.11.2]
> at org.apache.cassandra.cql3.statements.SelectStatement.execute(SelectStatement.java:118) ~[apache-cassandra-3.11.2.jar:3.11.2]
> at org.apache.cassandra.cql3.QueryProcessor.processStatement(QueryProcessor.java:224) ~[apache-cassandra-3.11.2.jar:3.11.2]
> at org.apache.cassandra.cql3.QueryProcessor.process(QueryProcessor.java:255) ~[apache-cassandra-3.11.2.jar:3.11.2]
> at org.apache.cassandra.cql3.QueryProcessor.process(QueryProcessor.java:240) ~[apache-cassandra-3.11.2.jar:3.11.2]
> at org.apache.cassandra.transport.messages.QueryMessage.execute(QueryMessage.java:116) ~[apache-cassandra-3.11.2.jar:3.11.2]
> at org.apache.cassandra.transport.Message$Dispatcher.channelRead0(Message.java:517) [apache-cassandra-3.11.2.jar:3.11.2]
> at org.apache.cassandra.transport.Message$Dispatcher.channelRead0(Message.java:410) [apache-cassandra-3.11.2.jar:3.11.2]
> 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_171]
> at org.apache.cassandra.concurrent.AbstractLocalAwareExecutorService$FutureTask.run(AbstractLocalAwareExecutorService.java:162) [apache-cassandra-3.11.2.jar:3.11.2]
> at org.apache.cassandra.concurrent.SEPWorker.run(SEPWorker.java:109) [apache-cassandra-3.11.2.jar:3.11.2]
> at java.lang.Thread.run(Thread.java:748) [na:1.8.0_171]
> {code}
>
> The table schema is like:
> {code}
> CREATE TABLE example.example_table (
> id bigint,
> hash text,
> json text,
> PRIMARY KEY (id, hash)
> ) WITH COMPACT STORAGE
> {code}
>
> The query is something like:
> {code}
> "select * from example.example_table;" // (We do know this is bad practise, and we are trying to fix that right now)
> {code}
> with fetch-size as 200, using DataStax Java driver.
> This table contains about 20k rows.
>
> Actually, the fix is quite simple,
>
> {code}
> --- a/src/java/org/apache/cassandra/service/pager/PagingState.java
> +++ b/src/java/org/apache/cassandra/service/pager/PagingState.java
> @@ -46,7 +46,7 @@ public class PagingState
> public PagingState(ByteBuffer partitionKey, RowMark rowMark, int remaining, int remainingInPartition)
> {
> - this.partitionKey = partitionKey;
> + this.partitionKey = partitionKey == null ? ByteBufferUtil.EMPTY_BYTE_BUFFER : partitionKey;
> this.rowMark = rowMark;
> this.remaining = remaining;
> this.remainingInPartition = remainingInPartition;
> {code}
>
> "partitionKey == null ? ByteBufferUtil.EMPTY_BYTE_BUFFER : partitionKey;" is in 2.2.6 and 2.2.8. But it was removed for some reason.
> The interesting part is that, we have:
> {code}
> public final ByteBuffer partitionKey; // Can be null for single partition queries.
> {code}
> It seems "partitionKey" could be null.
> Thanks a lot.
>
>
>
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