[jira] [Reopened] (CASSANDRA-7594) Disruptor Thrift server worker thread pool not adjustable

["Philip Thompson (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/CASSANDRA-7594?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Philip Thompson reopened CASSANDRA-7594:
----------------------------------------
    Reproduced In: 2.0.11, 2.1.1

The patch for this issue appears to have broken the dtest
thrift_hsha_test.py:ThriftHSHATest.test_closing_connections on 2.0-HEAD and 2.1-HEAD. Creating the connection pool now simply hangs forever.

> Disruptor Thrift server worker thread pool not adjustable
> ---------------------------------------------------------
>
>                 Key: CASSANDRA-7594
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-7594
>             Project: Cassandra
>          Issue Type: Bug
>            Reporter: Rick Branson
>            Assignee: Pavel Yaskevich
>             Fix For: 2.0.11
>
>         Attachments: CASSANDRA-7594.patch, disruptor-thrift-server-0.3.6-SNAPSHOT.jar
>
>
> For the THsHaDisruptorServer, there may not be enough threads to run blocking StorageProxy methods. The current number of worker threads is hardcoded at 2 per selector, so 2 * numAvailableProcessors(), or 64 threads on a 16-core hyperthreaded machine. StorageProxy methods block these threads, so this puts an upper bound on the throughput if hsha is enabled. If operations take 10ms on average, the node can only handle a maximum of 6,400 operations per second. This is a regression from hsha on 1.2.x, where the thread pool was tunable using rpc_min_threads and rpc_max_threads.



--
This message was sent by Atlassian JIRA
(v6.3.4#6332)