Race condition in sstable reference counting
--------------------------------------------
Key: CASSANDRA-3085
URL: https://issues.apache.org/jira/browse/CASSANDRA-3085
Project: Cassandra
Issue Type: Bug
Components: Core
Affects Versions: 1.0
Reporter: Jonathan Ellis
Assignee: Jonathan Ellis
Priority: Critical
Fix For: 1.0
DataTracker gives us an atomic View of memtable/sstables, but acquiring
references is not atomic. So it is possible to acquire references to an
SSTableReader object that is no longer valid, as in this example:
View V contains sstables {A, B}. We attempt a read in thread T using this View.
Meanwhile, A and B are compacted to {C}, yielding View W. No references exist
to A or B so they are cleaned up.
Back in thread T we acquire references to A and B. This does not cause an
error, but it will when we attempt to read from them next.
--
This message is automatically generated by JIRA.
For more information on JIRA, see: http://www.atlassian.com/software/jira
