[jira] [Updated] (CASSANDRA-7757) Possible Atomicity Violations in StreamSession and ThriftSessionManager

["Paulo Motta (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/CASSANDRA-7757?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Paulo Motta updated CASSANDRA-7757:
-----------------------------------
    Component/s: Streaming and Messaging

> Possible Atomicity Violations in StreamSession and ThriftSessionManager
> -----------------------------------------------------------------------
>
>                 Key: CASSANDRA-7757
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-7757
>             Project: Cassandra
>          Issue Type: Bug
>          Components: Streaming and Messaging
>            Reporter: Diogo Sousa
>            Assignee: Paulo Motta
>            Priority: Minor
>             Fix For: 2.1.9, 2.2.1, 3.0 alpha 1
>
>
> I'm developing a tool for atomicity violation detection and I think it have found two atomicity violations in cassandra.
> In org.apache.cassandra.streaming.StreamSession there might be an atomicity violation in method addTransferFiles(), lines 310-314:
> {noformat}
> 310:     StreamTransferTask task = transfers.get(cfId);
>             if (task == null)
>             {
>                 task = new StreamTransferTask(this, cfId);
> 314:         transfers.put(cfId, task);
>             }
> {noformat}
> A concurrent thread can insert a transfer with the same uuid creating two StreamTransferTask, and only one get into "transfers".
> In org.apache.cassandra.thrift.ThriftSessionManager, a simular situation can occur in method currentSession(), lines 57-61:
> {noformat}
> 57:  ThriftClientState cState = activeSocketSessions.get(socket);
>         if (cState == null)
>         {
>             cState = new ThriftClientState(socket);
> 51:       activeSocketSessions.put(socket, cState);
>         }
> {noformat}



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