Re: AS/400 Toolkit - Closing Files

[shahar mor <shahar_mor@xxxxxxxxx>]

--- Timothy Sullivan <TSullivan@computer-guidance.com>
wrote:
> Hello,
> 
>       We are currently developing an Java application
> using the AS/400
> toolkits JDBC driver.  The application uses one
> connection to the AS/400
> that is started when the user logs in and is not
> closed until the user exits
> the application.  This connection is used to create
> all Statements object.
> The problem is that in certain cases when we call
> Statement.close() the file
> on the AS/400 is left open.  
> 
>       On the AS/400 I use the command  "wrksbsjob
> qserver" and find the
> job QZDASOINI that corresponds to my session and
> check my open files.  The
> files QQAZDTBL1, QQAZDTBL4, QQAZDTBL7, and QQAZDCOLM
> are always open and
> remain so until we close the connection.  I assume
> that these are necessary
> for the JDBC connection.  Next I open a few
> Statement objects in Java,
> execute queries, and then call Statement.close() on
> each opened statement.
> However, some of the files I just queried are not
> closed according to the
> AS/400.  They seemed to have been left open even
> after executing a
> Statement.close() in Java.    The open files are
> closed when the Connection
> is closed, but closing the connection defeats our
> application persistence
> design and is costly in terms of performance.  It
> would seem that after
> closing the Java Statement object the corresponding
> file on the AS/400 that
> was queried would also close.  Has anyone seen this
> behavior?  Any
> suggestion on to what is going on?  Am I look at
> this the correct way? 
> 
> /Thanks
> Timothy Sullivan
> Senior Java Developer
>  
Hi,

We have the same problem. When open in "select for
update" and closing the statement the read level lock
is not released when statement is closed.

As far as i know there is a pmr over it. 

=====
Shahar mor
consultant

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