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From "Daniel Strawson (JIRA)" <>
Subject [jira] [Created] (CASSANDRA-4973) Secondary Index stops returning rows
Date Mon, 19 Nov 2012 12:20:58 GMT
Daniel Strawson created CASSANDRA-4973:

             Summary: Secondary Index stops returning rows
                 Key: CASSANDRA-4973
             Project: Cassandra
          Issue Type: Bug
          Components: Core
    Affects Versions: 1.1.6, 1.1.2
         Environment: Centos 6.3, Java 1.6.0_35, cass. 1.1.2 upgraded to 1.1.6
            Reporter: Daniel Strawson

I've been using cassandra on a project for a little while in development and have recently
suddenly started having an issue where the secondary index stops working, this is happening
on my new production system, we are not yet live.   Things work ok one moment, then suddenly
queries to the cf through the secondary index stop returning data.  I've seen it happen on
3 CFs. I've tried:

- various nodetools repair / scrub / rebuild_indexes options, none seem to make a difference.
- Doing a 'update column family <whatever> with column_metadata=[]' then repeating with
my correct column_metadata definition.  This seems to fix the problem (temporarily) until
it comes back.

The last time it happened I had just restarted cassandra, so it could be that which is causing
the issue, I've got the production system ok at the moment, I will try restarting a bit later
when its not being used and if I can get the issue to reoccur I will add more information.

Here is an example of the create column family I'm using for one of the CFs that affected:

create column family region
  with column_type = 'Standard'
  and comparator = 'UTF8Type'
  and default_validation_class = 'BytesType'
  and key_validation_class = 'UTF8Type'
  and read_repair_chance = 0.1
  and dclocal_read_repair_chance = 0.0
  and gc_grace = 864000
  and min_compaction_threshold = 4
  and max_compaction_threshold = 32
  and replicate_on_write = true
  and compaction_strategy = 'org.apache.cassandra.db.compaction.SizeTieredCompactionStrategy'
  and caching = 'KEYS_ONLY'
  and column_metadata = [
    {column_name : 'label',
    validation_class : UTF8Type},
    {column_name : 'countryCode',
    validation_class : UTF8Type,
    index_name : 'region_countryCode_idx',
    index_type : 0},
  and compression_options = {'sstable_compression' : ''};

I've noticed that CASSANDRA-4785 looks similar, in my case once the system has the problem,
it doesn't go away until I fix it.

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