cloudstack-issues mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Min Chen (JIRA)" <j...@apache.org>
Subject [jira] [Closed] (CLOUDSTACK-409) ThreadLocal Transaction and its db connection got reset for user managed db connnection, causing ClusterHeartBeat thread frequently trying to get db connection.
Date Thu, 08 Aug 2013 21:34:50 GMT

     [ https://issues.apache.org/jira/browse/CLOUDSTACK-409?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Min Chen closed CLOUDSTACK-409.
-------------------------------

    
> ThreadLocal Transaction and its db connection got reset for user managed db connnection,
causing ClusterHeartBeat thread frequently trying to get db connection.
> ----------------------------------------------------------------------------------------------------------------------------------------------------------------
>
>                 Key: CLOUDSTACK-409
>                 URL: https://issues.apache.org/jira/browse/CLOUDSTACK-409
>             Project: CloudStack
>          Issue Type: Bug
>      Security Level: Public(Anyone can view this level - this is the default.) 
>          Components: Management Server
>    Affects Versions: 4.0.0
>            Reporter: Min Chen
>            Assignee: Min Chen
>            Priority: Critical
>
> If we want to reuse db connection, we will invoke Transaction.transitToUserManagedConnection
to manage our db connection ourselves. However, this piece of code below
>     public void close() {
>         .........
>         if(this._dbId == CONNECTED_DB) {
>             tls.set(_prev);
>             _prev = null;
>             s_mbean.removeTransaction(this);
>         }
>     }
> will reset ThreadLocal transaction and close the connection, making reuse db connection
impossible. The impact of this bug is that currently ClusterHeartBeat thread will keep acquiring
db and releasing db connection instead of keeping one connection when thread start, thus may
cause MS automatically shutdown in a heavy load environment where MS cannot get a db connection.

--
This message is automatically generated by JIRA.
If you think it was sent incorrectly, please contact your JIRA administrators
For more information on JIRA, see: http://www.atlassian.com/software/jira

Mime
View raw message