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From Yulian Oifa <>
Subject Problem with counter columns
Date Wed, 18 Sep 2013 18:07:47 GMT
Hello to all
i am using counter columns in cassandra cluster with 3 nodes.
all 3 nodes are up and synchronized with ntp timeserver , same with client.
I am using libthrift java client.

Current problem i am having is that part of writes to counter columns
simply disappears ( most of time different values are added so i am able to
follow what missed and what not ).Approximately 40-50% of add requests

So for example if initial value is 1 , and i want to add 1 , 2 , 3 i would
expect final result on 7 , but it will return me the value 5 since add(2)
will be lost ( no exception is thrown ).

I did not disabled replica on write ( it is set to true ):

ColumnFamily: subscriptionsCounters
      Key Validation Class: org.apache.cassandra.db.marshal.TimeUUIDType
      Default column value validator:
      Columns sorted by: org.apache.cassandra.db.marshal.UTF8Type
      Row cache size / save period in seconds: 0.0/0
      Row Cache Provider:
      Key cache size / save period in seconds: 200000.0/14400
      Memtable thresholds: 1.1484375/1440/245 (millions of ops/minutes/MB)
      GC grace seconds: 864000
      Compaction min/max thresholds: 4/32
      Read repair chance: 1.0
      Replicate on write: true
      Built indexes: []

Also i dont see anything in log in any not , neither warning nor error.
I am writing data with Local QUORUM Consistency Level since it stopped
working with one.
same with read operations.

Current cassandra version is 0.8.10.

How can i debug , find the problem????

Thanks and best regards
Yulian Oifa

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