Re remote debugging, see cassandra-env.sh:
# uncomment to have Cassandra JVM listen for remote
debuggers/profilers on port 1414
# JVM_OPTS="$JVM_OPTS -Xdebug -Xnoagent
-Xrunjdwp:transport=dt_socket,server=y,suspend=n,address=1414"
On Sat, Dec 1, 2012 at 1:22 AM, Cyril Scetbon <cyril.scet...@free.fr> wrote:
> Hi,
>
> We got an issue here with cassandra 1.1.6 where a secondary index seems to be
> seen as empty. For example, If I try to see what are the first 10 values I
> have :
>
> cqlsh:pns_fr> select mailendwnd from syndic limit 10;
> mailendwnd
> --------------------------
> 2012-11-29 23:30:00+0000
> 2012-11-29 02:35:00+0000
> 2012-11-29 06:35:00+0000
> 2012-11-29 00:30:00+0000
> 2012-11-29 07:10:00+0000
> 2012-11-29 02:10:00+0000
> 2012-11-29 01:55:00+0000
> 2012-11-29 23:45:00+0000
> 2012-11-29 07:25:00+0000
> 2012-11-29 06:55:00+0000
>
> However, even if there is a secondary index on mailendwnd, we can't get any
> record :
>
> cqlsh:pns_fr> select mailendwnd from syndic where mailendwnd = '2012-11-29
> 02:35:00+0000' limit 1000;
>
> fyi, It's resolved by repairing the index and it happened a few times. I
> launched cassandra in debug mode and noticed that it thinks there is no data
> in the index :
>
> DEBUG [Thrift:14] 2012-11-30 08:35:20,756 CassandraServer.java (line 1232)
> execute_cql_query
> DEBUG [Thrift:14] 2012-11-30 08:35:20,758 QueryProcessor.java (line 445) CQL
> statement type: SELECT
> DEBUG [Thrift:14] 2012-11-30 08:35:20,777 StorageProxy.java (line 842)
> Command/ConsistencyLevel is RangeSliceCommand{keyspace='pns_fr',
> column_family='syndic', super_column=null,
> predicate=SlicePredicate(column_names:[java.nio.HeapByteBuffer[pos=0 lim=10
> cap=10]]), range=[min(-1),m
> in(-1)], row_filter =[IndexExpression(column_name:6D 61 69 6C 65 6E 64 77 6E
> 64, op:EQ, value:00 00 01 3B 4A 04 64 20)], maxResults=10000,
> maxIsColumns=false}/ONE
> DEBUG [Thrift:14] 2012-11-30 08:35:20,778 StorageProxy.java (line 1073)
> restricted ranges for query [min(-1),min(-1)] are [[min(-1),max(0)],
> (max(0),max(21267647932558653966460912964485513216)],
> (max(21267647932558653966460912964485513216),max(42535295865117307932921825928971026432
> )],
> (max(42535295865117307932921825928971026432),max(63802943797675961899382738893456539648)],
>
> (max(63802943797675961899382738893456539648),max(85070591730234615865843651857942052864)],
>
> (max(85070591730234615865843651857942052864),max(106338239662793269832304564822427566080)],
> (max
> (106338239662793269832304564822427566080),max(127605887595351923798765477786913079296)],
>
> (max(127605887595351923798765477786913079296),max(148873535527910577765226390751398592512)],
> (max(148873535527910577765226390751398592512),min(-1)]]
> DEBUG [Thrift:14] 2012-11-30 08:35:20,779 NetworkTopologyStrategy.java (line
> 125) /10.244.136.105,/10.244.137.238,/10.244.130.226 endpoints in datacenter
> us-west-2 for token 0
> DEBUG [Thrift:14] 2012-11-30 08:35:20,780 StorageProxy.java (line 869) local
> range slice
> DEBUG [Thrift:14] 2012-11-30 08:35:20,782 ExtendedFilter.java (line 181)
> adding columns to original Filter to cover additional expressions
> DEBUG [Thrift:14] 2012-11-30 08:35:20,782 KeysSearcher.java (line 99) Primary
> scan clause is mailendwnd
> DEBUG [Thrift:14] 2012-11-30 08:35:20,783 ColumnFamilyStore.java (line 1449)
> Filtering org.apache.cassandra.db.index.keys.KeysSearcher$1@60ce274e for rows
> matching
> org.apache.cassandra.db.filter.ExtendedFilter$FilterWithClauses@7e76a388
> DEBUG [Thrift:14] 2012-11-30 08:35:20,784 KeysSearcher.java (line 135)
> Scanning index 'syndic.mailendwnd EQ 2012-11-29 02:35:00+0000' starting with
> DEBUG [Thrift:14] 2012-11-30 08:35:20,784 CollationController.java (line 227)
> collectAllData
> DEBUG [Thrift:14] 2012-11-30 08:35:20,784 KeysSearcher.java(line 145) fetched
> null
> DEBUG [Thrift:14] 2012-11-30 08:35:20,784 KeysSearcher.java (line 148) no
> data, all done <----- THIS IS WHAT IT SAYS HERE
>
> I tried to remotely debug cassandra from eclipse but I wasn't able to do it.
> Whenever it tries to connect to the dt_socket it fails and the port is closed
> on the server :( I tried locally without any issue but I havent the data (can
> I copy data from one node to mine and debug it locally, is it possible ?).
> I'm investigating network issues concerning that to help you. If you have
> input concerning the issue before I can debug it, welcome !
>
> Regards
>
> Cyril SCETBON
>
--
Jonathan Ellis
Project Chair, Apache Cassandra
co-founder, http://www.datastax.com
@spyced
