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From DuyHai Doan <>
Subject Re: Error "evicting cold readers" when launching an EmbeddedCassandraService for a second time
Date Thu, 01 May 2014 09:15:52 GMT
Hello Clint

 Just one question, are you sure that nothing from your code remove the
SSTables between tests ? I'm using extensively the same infrastructure than
the EmbeddedCassandraService with Achilles and I have no such issue so far


On Wed, Apr 30, 2014 at 8:43 PM, Clint Kelly <> wrote:

> Hi all,
> I have a unit test framework for a Cassandra project that I'm working on.
> For every one of my test classes, I delete all of the data file, commit
> log, and saved cache locations, start an EmbeddedCassandraService, and
> populate a keyspace and tables from scratch.
> Currently, the unit tests that run in my first test class work fine, but
> those in my second class die with this error:
> /Users/clint/work/external-repos/cassandra2-hadoop2/target/cassandra/data/system/local/system-local-jb-5-Data.db
> (No such file or directory)
> This error happens immediately after I call
> EmbeddedCassandraService.start();
> I turned on debugging and traced through the code, and I see this right
> before the error message:
> 14/04/30 11:22:47 DEBUG org.apache.cassandra.service.FileCacheService:
> Evicting cold readers for
> /Users/clint/work/external-repos/cassandra2-hadoop2/target/cassandra/data/system/local/system-local-jb-5-Data.db
> This seems to happen in a callback when a value (in this case, a file
> reader) is evicted from a Guava cache.
> I assume that the problem that I have is something like the following:
>    - There is some kind of reading thread associated with
>    target/cassandra/data/system/local/system-local-jb-5-Data.db
>    - Even after I stop my EmbeddedCassandraService and blow away all of
>    the data file, commit log, and saved cache locations from my first unit
>    test, the information about the reader for the now-deleted data file still
>    exists.
>    - Later when this reference expires in the cache and Cassandra goes to
>    notify the reader, the error occurs because the file no longer exists.
> Does anyone have any suggestions on how to deal with this?
> Best regards,
> Clint

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