我创建了以下模式来表示用户和上一条消息排序的一组线程之间的关联（用户已读取的线程以及未读取的线程）：
CREATE TABLE table(user_id bigint, message_id bigint, thread_id bigint, read boolean, PRIMARY KEY(user_id, message_id)) WITH CLUSTERING ORDER BY (message_id DESC);
CREATE INDEX ON table(read);
插入一些值后，我尝试运行此查询以获取用户的最新读取或未读线程：
SELECT thread_id, message_id FROM table WHERE user_id = ? AND message_id < ? AND read = ? LIMIT ?
如果通过cqlsh运行，则查询有效。但是，当通过datastax客户端运行时，在客户端我们得到超时异常，而在服务器端，Cassandra日志显示此异常：
ERROR [ReadStage:4190] 2013-12-10 13:18:03,579 CassandraDaemon.java (line 187) Exception in thread Thread[ReadStage:4190,5,main]
java.lang.RuntimeException: java.lang.ArrayIndexOutOfBoundsException: 0
at org.apache.cassandra.service.StorageProxy$DroppableRunnable.run(StorageProxy.java:1940)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
at java.lang.Thread.run(Thread.java:722)
Caused by: java.lang.ArrayIndexOutOfBoundsException: 0
at org.apache.cassandra.db.filter.SliceQueryFilter.start(SliceQueryFilter.java:261)
at org.apache.cassandra.db.index.composites.CompositesSearcher.makePrefix(CompositesSearcher.java:66)
at org.apache.cassandra.db.index.composites.CompositesSearcher.getIndexedIterator(CompositesSearcher.java:101)
at org.apache.cassandra.db.index.composites.CompositesSearcher.search(CompositesSearcher.java:53)
at org.apache.cassandra.db.index.SecondaryIndexManager.search(SecondaryIndexManager.java:537)
at org.apache.cassandra.db.ColumnFamilyStore.search(ColumnFamilyStore.java:1669)
at org.apache.cassandra.db.PagedRangeCommand.executeLocally(PagedRangeCommand.java:109)
at org.apache.cassandra.service.StorageProxy$LocalRangeSliceRunnable.runMayThrow(StorageProxy.java:1423)
at org.apache.cassandra.service.StorageProxy$DroppableRunnable.run(StorageProxy.java:1936)
... 3 more
有谁知道问题是什么？谢谢！