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Re: ERXObjectStoreCoordinator dispose not releasing database connection?
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Re: ERXObjectStoreCoordinator dispose not releasing database connection?


  • Subject: Re: ERXObjectStoreCoordinator dispose not releasing database connection?
  • From: John Pollard <email@hidden>
  • Date: Tue, 25 Mar 2014 10:04:03 +0000

Thanks Aaron,

In mysql I use:
show status like "Threads_connected";

to see the two connections added when I create an OSC in the session, key elements being:

objectStoreCoordinator = new ERXObjectStoreCoordinator(true); // true = close db connections on closing
this.ec = ERXEC.newEditingContext(objectStoreCoordinator);
setDefaultEditingContext(this.ec);

Then to tidy up in terminate I use:

objectStoreCoordinator.dispose();

which invokes ERXEOAccessUtilities.closeDatabaseConnections() on itself

Whether or not I dispose of the ec as well, or call ERXEOAccessUtilities.closeDatabaseConnections() on the osc myself, I still get only one of the database connections dropped.

John

On 16 Mar 2014, at 09:35, Aaron Rosenzweig <email@hidden> wrote:

I’m sorry John,

I’m traveling in a faraway land and have had spotty Internet until now.

Short answer - I don’t know, if you did it right both (2) DB connections should be gone now. 

Long answer below:

Doing “dispose” of the ObjectStoreCoordinator (not the EC) should release the primary DB connection that your WOApp was using.

To dispose of the 2nd “hidden” connection that was only used to get the JDBC info and then not used… you must use the Wonder utilities call. 

My guess is that if you are using the Wonder utilities and see one of your two connections dropping then your problem is that you are disposing the EC by accident instead of the EC’s ObjectStoreCoordinator. It has to be the “Coordinator” that you are disposing because that is what holds the connection to the DB, not the EC. 

Double check :-)

Cheers,
Aaron Rosenzweig / Chat 'n Bike
e:  email@hidden  t:  (301) 956-2319
Chat 'n Bike Chat 'n Bike

On Mar 14, 2014, at 10:16 PM, John Pollard <email@hidden> wrote:

I see that constructing ERXObjectStoreCoordinator(true) is another way to work around the issue of closing the db connection.
However, I still get two connections created and only one closed when disposed.
John

On 13 Mar 2014, at 14:33, John Pollard <email@hidden> wrote:

Thanks Aaron, half way there, that closed one of the two connections, but neither of mine were closing so still one left open after the following code?
John

On 13 Mar 2014, at 13:04, Aaron Rosenzweig <email@hidden> wrote:

Hi John,

Yes, that’s a known Apple bug. It creates an extra one to read “Database info” and then never releases it. There is a Wonder method to close database connections like that.

ec.dispose();
ERXEOAccessUtilities.closeDatabaseConnections(objectStore);
objectStore.dispose();

Cheers,
Aaron Rosenzweig / Chat 'n Bike
e:  email@hidden  t:  (301) 956-2319
Chat 'n Bike Chat 'n Bike
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  • Follow-Ups:
    • Re: ERXObjectStoreCoordinator dispose not releasing database connection?
      • From: Aaron Rosenzweig <email@hidden>
References: 
 >ERXObjectStoreCoordinator dispose not releasing database connection? (From: John Pollard <email@hidden>)
 >Re: ERXObjectStoreCoordinator dispose not releasing database connection? (From: Aaron Rosenzweig <email@hidden>)
 >Re: ERXObjectStoreCoordinator dispose not releasing database connection? (From: John Pollard <email@hidden>)
 >Re: ERXObjectStoreCoordinator dispose not releasing database connection? (From: John Pollard <email@hidden>)
 >Re: ERXObjectStoreCoordinator dispose not releasing database connection? (From: Aaron Rosenzweig <email@hidden>)

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