Thank you to all for the quick response. The test that fails is doing a insert, another insert (to update data) and then a get to validate. If I make multiple copies of the same test and execute them in succession, different copies will fail on successive runs. Each test only has a single get, so one would assume the get in testN must be causing testN+1 to fail. It is going to take me a little bit to dig down deep enough into our code to see if that is the issue.
-Rick From: Jonathan Ellis [mailto:jbel...@gmail.com] Sent: Monday, September 26, 2011 3:34 PM To: user@cassandra.apache.org Subject: Re: Update of column sometimes takes 10 seconds Sounds a lot like this to me: http://cassandra-user-incubator-apache-org.3065146.n2.nabble.com/Updates -lost-td6739612.html On Mon, Sep 26, 2011 at 1:55 PM, Rick Whitesel (rwhitese) < rwhit...@cisco.com> wrote: Hi All: We have a simple junit test that inserts a column, immediately updates that column and then validates that the data updated. Cassandra is run embedded in the unit test. Sometimes the test will pass, i.e. the updated data is correct, and sometimes the test will fail. The configuration is set to: <CommitLogSync>periodic</CommitLogSync> and <CommitLogSyncPeriodInMS>10000</CommitLogSyncPeriodInMS> We are running version 0.6.9. We plan to update to the latest version but cannot until after the release we are wrapping up. We are using the client batch mutate to create and update the data. From what I understand, the commit log write will return immediately and the data will be store in memory. If that is the case, then why would our test sometimes fail? -Rick Whitesel Simplify, Standardize and Conserve Rick Whitesel Technical Lead Customer Contact Business Unit rwhit...@cisco.com <mailto:nordb...@cisco.com> Phone :978-936-0479 500 Beaver Brook Road Boxboro, MA 01719 Mailing address: 1414 Massachusetts Avenue Boxboro, MA 01719 United States www.cisco.com <http://www.cisco.com/> -- Jonathan Ellis Project Chair, Apache Cassandra co-founder of DataStax, the source for professional Cassandra support http://www.datastax.com
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