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https://issues.apache.org/jira/browse/CASSANDRA-3006?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13083978#comment-13083978
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Boris Yen commented on CASSANDRA-3006:
--------------------------------------
Just tried 0.8.4. It seems much better now, but I still got value that is not
what I expected.
Follow the same steps above, after step 11, I check the counter on .152, the
counter values changes from 1001 to 200. And then I follow the steps 12 and 13.
The counter value of .151 is still 1001, but the counter value of .152 is still
200. After changing the consistencylevel to quorum and do the read again, this
time the counter value of .152 became 1001.
I am kind of confused, because at step 10, I can get 1001 on both nodes, how
come the value of .152 changes to 200 when .151 is down. Is this the right
behavior of current design?
> Enormous counter
> -----------------
>
> Key: CASSANDRA-3006
> URL: https://issues.apache.org/jira/browse/CASSANDRA-3006
> Project: Cassandra
> Issue Type: Bug
> Affects Versions: 0.8.3
> Environment: ubuntu 10.04
> Reporter: Boris Yen
> Assignee: Sylvain Lebresne
> Fix For: 0.8.4
>
> Attachments: 3006.patch
>
>
> I have two-node cluster with the following keyspace and column family
> settings.
> Cluster Information:
> Snitch: org.apache.cassandra.locator.SimpleSnitch
> Partitioner: org.apache.cassandra.dht.RandomPartitioner
> Schema versions:
> 63fda700-c243-11e0-0000-2d03dcafebdf: [172.17.19.151, 172.17.19.152]
> Keyspace: test:
> Replication Strategy: org.apache.cassandra.locator.NetworkTopologyStrategy
> Durable Writes: true
> Options: [datacenter1:2]
> Column Families:
> ColumnFamily: testCounter (Super)
> "APP status information."
> Key Validation Class: org.apache.cassandra.db.marshal.BytesType
> Default column value validator:
> org.apache.cassandra.db.marshal.CounterColumnType
> Columns sorted by:
> org.apache.cassandra.db.marshal.BytesType/org.apache.cassandra.db.marshal.BytesType
> Row cache size / save period in seconds: 0.0/0
> Key cache size / save period in seconds: 200000.0/14400
> Memtable thresholds: 1.1578125/1440/247 (millions of ops/MB/minutes)
> GC grace seconds: 864000
> Compaction min/max thresholds: 4/32
> Read repair chance: 1.0
> Replicate on write: true
> Built indexes: []
> Then, I use a test program based on hector to add a counter column
> (testCounter[sc][column]) 1000 times. In the middle the adding process, I
> intentional shut down the node 172.17.19.152. In addition to that, the test
> program is smart enough to switch the consistency level from Quorum to One,
> so that the following adding actions would not fail.
> After all the adding actions are done, I start the cassandra on
> 172.17.19.152, and I use cassandra-cli to check if the counter is correct on
> both nodes, and I got a result 1001 which should be reasonable because hector
> will retry once. However, when I shut down 172.17.19.151 and after
> 172.17.19.152 is aware of 172.17.19.151 is down, I try to start the cassandra
> on 172.17.19.151 again. Then, I check the counter again, this time I got a
> result 481387 which is so wrong.
> I use 0.8.3 to reproduce this bug, but I think this also happens on 0.8.2 or
> before also.
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