Hi, I experience issues when doing a indexslicequery with multiple expressions if one of the expressions is about a non index column
I did the equivalent of this example (but with my data) from http://www.datastax.com/dev/blog/whats-new-cassandra-07-secondary-indexes Secondary indexes automate this. Let's add some state data: [default@demo] set users[bsanderson][state] = 'UT'; [default@demo] set users[prothfuss][state] = 'WI'; [default@demo] set users[htayler][state] = 'UT'; Note that even though state is not indexed yet, we can include the new state data in a query as long as another column in the query is indexed: [default@demo] get users where state = 'UT'; No indexed columns present in index clause with operator EQ [default@demo] get users where state = 'UT' and birth_date > 1970; No indexed columns present in index clause with operator EQ [default@demo]get users where birth_date = 1968 and state = 'UT'; ------------------- RowKey: htayler => (column=birth_date, value=1968, timestamp=1291334765649000) => (column=full_name, value=Howard Tayler, timestamp=1291334749160000) => (column=state, value=5554, timestamp=1291334890708000) On On 0.7.8 (with CASSANDRA-2964 applied) This example will not return any data, but return "0 rows". I repeated the query multiple times with different variations for the values which should all have returned data, but eventually I ended up with the cluster having 80000 reads pending on some of the nodes On 0.7.5 the query will result in a NullPointerException being thrown and "null" returned in the cli ERROR [ReadStage:258] 2011-08-09 16:03:27,153 AbstractCassandraDaemon.java (line 113) Fatal exception in thread Thread[ReadStage:258,5,main] java.lang.RuntimeException: java.lang.NullPointerException at org.apache.cassandra.service.IndexScanVerbHandler.doVerb(IndexScanVerbHandler.java:51) at org.apache.cassandra.net.MessageDeliveryTask.run(MessageDeliveryTask.java:72) at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908) at java.lang.Thread.run(Thread.java:619) Caused by: java.lang.NullPointerException at org.apache.cassandra.db.ColumnFamily.addAll(ColumnFamily.java:131) at org.apache.cassandra.db.ColumnFamilyStore.scan(ColumnFamilyStore.java:1615) at org.apache.cassandra.service.IndexScanVerbHandler.doVerb(IndexScanVerbHandler.java:42) ... 4 more ERROR [ReadStage:258] 2011-08-09 16:03:27,153 AbstractCassandraDaemon.java (line 113) Fatal exception in thread Thread[ReadStage:258,5,main] java.lang.RuntimeException: java.lang.NullPointerException at org.apache.cassandra.service.IndexScanVerbHandler.doVerb(IndexScanVerbHandler.java:51) at org.apache.cassandra.net.MessageDeliveryTask.run(MessageDeliveryTask.java:72) at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908) at java.lang.Thread.run(Thread.java:619) Caused by: java.lang.NullPointerException at org.apache.cassandra.db.ColumnFamily.addAll(ColumnFamily.java:131) at org.apache.cassandra.db.ColumnFamilyStore.scan(ColumnFamilyStore.java:1615) at org.apache.cassandra.service.IndexScanVerbHandler.doVerb(IndexScanVerbHandler.java:42) ... 4 more Can anybody reproduce this? Greetings, Roland -- YOOCHOOSE GmbH Roland Gude Software Engineer Im Mediapark 8, 50670 Köln +49 221 4544151 (Tel) +49 221 4544159 (Fax) +49 171 7894057 (Mobil) Email: roland.g...@yoochoose.com WWW: www.yoochoose.com<http://www.yoochoose.com/> YOOCHOOSE GmbH Geschäftsführer: Dr. Uwe Alkemper, Michael Friedmann Handelsregister: Amtsgericht Köln HRB 65275 Ust-Ident-Nr: DE 264 773 520 Sitz der Gesellschaft: Köln
