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From "Daniel John Debrunner (JIRA)" <derby-...@db.apache.org>
Subject [jira] Commented: (DERBY-1737) Network Server should check for current open and active connections before shutting down a database
Date Fri, 08 Sep 2006 00:52:23 GMT
    [ http://issues.apache.org/jira/browse/DERBY-1737?page=comments#action_12433284 ] 
            
Daniel John Debrunner commented on DERBY-1737:
----------------------------------------------

Yes, the connection's failing in an unclear way is a separate bug, they should be able to
deal cleanly with the server shutting done cleanly or just disappearing. And 58009 has a horrible
message, very unclear!

> Network Server should check for current open and active connections before shutting down
a database
> ---------------------------------------------------------------------------------------------------
>
>                 Key: DERBY-1737
>                 URL: http://issues.apache.org/jira/browse/DERBY-1737
>             Project: Derby
>          Issue Type: Bug
>          Components: Network Server
>    Affects Versions: 10.0.2.0
>         Environment: Any
>            Reporter: Rajesh Kartha
>         Attachments: shutdown.sql, shutdown_embed.sql
>
>
> When a database shutdown is issued using the 'shutdown=true'  by a client, the network
server does not check for any active
> connections and shuts down the respective database. As a result queries on the active
connection start failing.
> I would expect the right behaviour should be to throw an error  mentioning shutdown was
not performed since there are open connections
> to the database.
> Here is a sample output:
> ij version 10.2
> ij> connect 'jdbc:derby://localhost:1527/testdb;create=true' as connA;
> ij> drop table t;
> 0 rows inserted/updated/deleted
> ij> create table t (id int);
> 0 rows inserted/updated/deleted
> ij> insert into t values (1);
> 1 row inserted/updated/deleted
> ij> insert into t values (2);
> 1 row inserted/updated/deleted
> ij> select * from t;
> ID
> -----------
> 1
> 2
> 2 rows selected
> --
> --Connection A is still open
> --
> ij> connect 'jdbc:derby://localhost:1527/testdb' as connB;
> ij(CONNB)> insert into t values (3);
> 1 row inserted/updated/deleted
> ij(CONNB)> select * from t;
> ID
> -----------
> 1
> 2
> 3
> 3 rows selected
> --
> -- Should error out saying there are open connections to the database
> --
> ij(CONNB)> connect 'jdbc:derby://localhost:1527/testdb;shutdown=true';
> ERROR 08006: DERBY SQL error: SQLCODE: -1, SQLSTATE: 08006, SQLERRMC: Database 'testdb'
shutdown.
> ij(CONNB)> disconnect;
> --
> --Connection A is still open
> --
> ij> show connections;
> CONNA -         jdbc:derby://localhost:1527/testdb;create=true
> No current connection
> --
> --Set connection to connection A
> --
> ij> set connection connA;
> --
> --Try a sql
> --
> ij> select * from t;
> ERROR 58009: A network protocol error was encountered and the connection has been terminated:
the requested command encountered an unarchitected and implementation-specific condition for
which there was no architected message
> ij>
> This issue kind of exists in embeddded also but since the database was booted in the
same JVM,  one can argue there is more control on the connections  made to the database from
the current JVM. In embedded the ''shutdown=true'  closes all active connections to the database.
> ij(CONNB)> connect 'jdbc:derby:testdb;shutdown=true';
> ERROR 08006: Database 'testdb' shutdown.
> ij(CONNB)> disconnect;
> --
> -- Shows no current connections after a shutdown
> -- 
> ij> show connections;
> No current connection
> ij> set connection connA;
> IJ ERROR: No connection exists with the name CONNA
> ij> select * from t;
> IJ ERROR: Unable to establish connection
> ij>

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