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https://issues.apache.org/jira/browse/CASSANDRA-11473?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Tyler Hobbs updated CASSANDRA-11473:
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Summary: Clustering column value is zeroed out in some query results (was:
Inconsistent query results)
> Clustering column value is zeroed out in some query results
> -----------------------------------------------------------
>
> Key: CASSANDRA-11473
> URL: https://issues.apache.org/jira/browse/CASSANDRA-11473
> Project: Cassandra
> Issue Type: Bug
> Environment: debian jessie patch current with Cassandra 3.0.4
> Reporter: Jason Kania
>
> As per a discussion on the mailing list,
> http://www.mail-archive.com/user@cassandra.apache.org/msg46902.html, we are
> encountering inconsistent query results when the following query is run:
> {noformat}
> select "subscriberId","sensorUnitId","sensorId","time" from
> "sensorReadingIndex" where "subscriberId"='JASKAN' AND "sensorUnitId"=0 AND
> "sensorId"=0 ORDER BY "time" LIMIT 10;
> {noformat}
> Invalid Query Results
> {noformat}
> subscriberId sensorUnitId sensorId time
> JASKAN 0 0 2015-05-24 2:09
> JASKAN 0 0 1969-12-31 19:00
> JASKAN 0 0 2016-01-21 2:10
> JASKAN 0 0 2016-01-21 2:10
> JASKAN 0 0 2016-01-21 2:10
> JASKAN 0 0 2016-01-21 2:11
> JASKAN 0 0 2016-01-21 2:22
> JASKAN 0 0 2016-01-21 2:22
> JASKAN 0 0 2016-01-21 2:22
> JASKAN 0 0 2016-01-21 2:22
> {noformat}
> Valid Query Results
> {noformat}
> subscriberId sensorUnitId sensorId time
> JASKAN 0 0 2015-05-24 2:09
> JASKAN 0 0 2015-05-24 2:09
> JASKAN 0 0 2015-05-24 2:10
> JASKAN 0 0 2015-05-24 2:10
> JASKAN 0 0 2015-05-24 2:10
> JASKAN 0 0 2015-05-24 2:10
> JASKAN 0 0 2015-05-24 2:11
> JASKAN 0 0 2015-05-24 2:13
> JASKAN 0 0 2015-05-24 2:13
> JASKAN 0 0 2015-05-24 2:14
> {noformat}
> Running the following yields no rows indicating that the 1969... timestamp is
> invalid.
> {noformat}
> select "subscriberId","sensorUnitId","sensorId","time" FROM
> "edgeTransitionIndex" where "subscriberId"='JASKAN' AND "sensorUnitId"=0 AND
> "sensorId"=0 and time='1969-12-31 19:00:00-0500';
> {noformat}
> The schema is as follows:
> {noformat}
> CREATE TABLE sensorReading."sensorReadingIndex" (
> "subscriberId" text,
> "sensorUnitId" int,
> "sensorId" int,
> time timestamp,
> "classId" int,
> correlation float,
> PRIMARY KEY (("subscriberId", "sensorUnitId", "sensorId"), time)
> ) WITH CLUSTERING ORDER BY (time 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',
> 'max_threshold': '32', 'min_threshold': '4'}
> AND compression = {'chunk_length_in_kb': '64', 'class':
> 'org.apache.cassandra.io.compress.LZ4Compressor'}
> AND crc_check_chance = 1.0
> 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 = '99PERCENTILE';
> CREATE INDEX classSecondaryIndex ON sensorReading."sensorReadingIndex"
> ("classId");
> {noformat}
> We were asked to provide our sstables as well but these are very large and
> would require some data obfuscation. We are able to run code or scripts
> against the data on our servrers if that is option.
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