Cassandra: 0.7.8
phpcassa: 0.7.a.4
The front page of a site I manage displays a list of products
available. If a product is available, a visitor can order, otherwise
"not in stock" is displayed.
Whether the product is in stock or not is determined from the
cassandra cluster. Occasionally, but not frequently (maybe once or
twice per day out of a hundred), the code throws a Not Found
Exception. The read consistency level is explicitly set to quorum.
Here is an approximation of what the exception looks like:
exception 'cassandra_NotFoundException' in
/home/www/phpcassa-0.7.a.4/columnfamily.php:251
Stack trace:
#0 /home/www/foo.php(54): ColumnFamily->get('stock', Array)
#1 {main}
Repairs and compactions are performed regularly. I also did a complete
json rebuild of the cluster last night, pulling data into a single
file, and reloading the cluster from scratch. The NFE error persisted
even after doing that.
What could be the cause of this, and how can I prevent it from occurring?
Thanks for the help
