RE: [JBoss-user] Solving Oracle Connection Pool Hanging
Keep in mind you can use Oracle Connection Manager tool which "pools" connection in the dbms, outside the app server. It keeps allocated resources for closed connection to bind it to new ones, thus making the connection physical creation much faster. Shahar -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of Tim Taylor Sent: Wednesday, April 11, 2001 2:21 AM To: [EMAIL PROTECTED] Subject: Re: [JBoss-user] Solving Oracle Connection Pool Hanging Oracle's DataSources don't do pooling in the sense of maintaining pools of physical connections (nneded for speed). Oracle calls minerva's type of pooling "connection caching" in their documentation for their JDBC 2.0 drivers. Oracle provides an "example" implementation of a cache called OracleConnectionCacheImpl (implements DataSource). You instantiate the cache with one of the pooling data sources (OracleXADataSource or OracleConnectionPoolDataSource). The cache then does what minerva does in terms of pooling -- but not as conveniently or portably. I also found what appears to be a limitation in the OracleConnectionCacheImpl. It did not appear to work correctly with OracleXADataSources. The cache allocates from the XA data source you give it by calling getPooledConnection() -- not getXAConnection(). I was able to call commit() on one of the connections from the supposedly XAConnection cache, and that's not good. There was no source code nearby, so I gave up and just went with minerva. Now if I could just get an example minerva's JDBCDataSourceLoader working. The trouble is that there are places that are outside the container where you need data sources. One example is, I think, in using the database for authentication. You need access to a connection, but you are outside a container (in the SecurityInterceptor?). Another example is in custom MBean services where you might want to use the database to store configuration information. You can use physical connections from the minerva XA pool outside the container and manually commit them if you want, but it seems wrong to do that. Tim Toby Allsopp wrote: > On Tue, Apr 10, 2001 at 05:55:27PM +0200, Shahar Solomianik wrote: > >> Toby, I think you are right. >> I replaced the mbean configuration to use XADataSourceLoader and minerva (I >> had to patch minerva to support scrollable result sets...), tested the >> server under load and it was MUCH faster. >> I didnt get into details and log/trace files, but the differences in speed >> were visible to the human eye > > > I'd be very interested to hear of any deeper investigation of this. It > might be as simple as the Oracle DataSource implementation not doing > pooling. > > Toby. > > ___ > JBoss-user mailing list > [EMAIL PROTECTED] > http://lists.sourceforge.net/lists/listinfo/jboss-user ___ JBoss-user mailing list [EMAIL PROTECTED] http://lists.sourceforge.net/lists/listinfo/jboss-user ___ JBoss-user mailing list [EMAIL PROTECTED] http://lists.sourceforge.net/lists/listinfo/jboss-user
Re: [JBoss-user] Solving Oracle Connection Pool Hanging
Oracle's DataSources don't do pooling in the sense of maintaining pools of physical connections (nneded for speed). Oracle calls minerva's type of pooling "connection caching" in their documentation for their JDBC 2.0 drivers. Oracle provides an "example" implementation of a cache called OracleConnectionCacheImpl (implements DataSource). You instantiate the cache with one of the pooling data sources (OracleXADataSource or OracleConnectionPoolDataSource). The cache then does what minerva does in terms of pooling -- but not as conveniently or portably. I also found what appears to be a limitation in the OracleConnectionCacheImpl. It did not appear to work correctly with OracleXADataSources. The cache allocates from the XA data source you give it by calling getPooledConnection() -- not getXAConnection(). I was able to call commit() on one of the connections from the supposedly XAConnection cache, and that's not good. There was no source code nearby, so I gave up and just went with minerva. Now if I could just get an example minerva's JDBCDataSourceLoader working. The trouble is that there are places that are outside the container where you need data sources. One example is, I think, in using the database for authentication. You need access to a connection, but you are outside a container (in the SecurityInterceptor?). Another example is in custom MBean services where you might want to use the database to store configuration information. You can use physical connections from the minerva XA pool outside the container and manually commit them if you want, but it seems wrong to do that. Tim Toby Allsopp wrote: > On Tue, Apr 10, 2001 at 05:55:27PM +0200, Shahar Solomianik wrote: > >> Toby, I think you are right. >> I replaced the mbean configuration to use XADataSourceLoader and minerva (I >> had to patch minerva to support scrollable result sets...), tested the >> server under load and it was MUCH faster. >> I didnt get into details and log/trace files, but the differences in speed >> were visible to the human eye > > > I'd be very interested to hear of any deeper investigation of this. It > might be as simple as the Oracle DataSource implementation not doing > pooling. > > Toby. > > ___ > JBoss-user mailing list > [EMAIL PROTECTED] > http://lists.sourceforge.net/lists/listinfo/jboss-user ___ JBoss-user mailing list [EMAIL PROTECTED] http://lists.sourceforge.net/lists/listinfo/jboss-user
Re: [JBoss-user] Solving Oracle Connection Pool Hanging
On Tue, Apr 10, 2001 at 05:55:27PM +0200, Shahar Solomianik wrote: > Toby, I think you are right. > I replaced the mbean configuration to use XADataSourceLoader and minerva (I > had to patch minerva to support scrollable result sets...), tested the > server under load and it was MUCH faster. > I didnt get into details and log/trace files, but the differences in speed > were visible to the human eye I'd be very interested to hear of any deeper investigation of this. It might be as simple as the Oracle DataSource implementation not doing pooling. Toby. ___ JBoss-user mailing list [EMAIL PROTECTED] http://lists.sourceforge.net/lists/listinfo/jboss-user
RE: [JBoss-user] Solving Oracle Connection Pool Hanging
Toby, I think you are right.
I replaced the mbean configuration to use XADataSourceLoader and minerva (I
had to patch minerva to support scrollable result sets...), tested the
server under load and it was MUCH faster.
I didnt get into details and log/trace files, but the differences in speed
were visible to the human eye
Thanks, Shahar.
-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED]]On Behalf Of Toby Allsopp
Sent: Tuesday, April 10, 2001 3:47 AM
To: [EMAIL PROTECTED]
Subject: Re: [JBoss-user] Solving Oracle Connection Pool Hanging
On Mon, Apr 09, 2001 at 11:20:36PM +0200, Shahar Solomianik wrote:
> Apart from things like that in my code (bmp entities and stateless
sessions)
> :
>
> Context ctx = new InitialContext();
> DataSource ds =
(DataSource)ctx.lookup("java:comp/env/jdbc/OracleDB");
> conn = ds.getConnection();
Hang on. Are you saying that the class
oracle.jdbc.xa.client.OracleXADataSource
implements javax.sql.DataSource *and* javax.sql.XADataSource?
Do you have documentation on what this class actually implements?
It looks like Oracle's JDBC driver is doing some of the stuff that I said
it wouldn't. If this is working properly, then you need to be aware that
this is not in any way portable.
I still don't believe that transactions will work correctly, because the
JDBC driver doesn't have a hook into JBoss's transaction manager. Be
very, very careful before you decide it's working. I'd be interested to see
some debugging output from the transaction manager if you decide this is
working (set trace to true in TxCapsule or something, I think).
Toby.
>name="DefaultDomain:service=XADataSource,name=OraclePool">
> OraclePool
>
name="DataSourceClass">oracle.jdbc.xa.client.OracleXADataSource
> name="Properties">URL=jdbc:oracle:oci8:scott/tiger@orcl
>
>
> Shahar.
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Re: [JBoss-user] Solving Oracle Connection Pool Hanging
On Mon, Apr 09, 2001 at 11:20:36PM +0200, Shahar Solomianik wrote:
> Apart from things like that in my code (bmp entities and stateless sessions)
> :
>
> Context ctx = new InitialContext();
> DataSource ds = (DataSource)ctx.lookup("java:comp/env/jdbc/OracleDB");
> conn = ds.getConnection();
Hang on. Are you saying that the class oracle.jdbc.xa.client.OracleXADataSource
implements javax.sql.DataSource *and* javax.sql.XADataSource?
Do you have documentation on what this class actually implements?
It looks like Oracle's JDBC driver is doing some of the stuff that I said
it wouldn't. If this is working properly, then you need to be aware that
this is not in any way portable.
I still don't believe that transactions will work correctly, because the
JDBC driver doesn't have a hook into JBoss's transaction manager. Be
very, very careful before you decide it's working. I'd be interested to see
some debugging output from the transaction manager if you decide this is
working (set trace to true in TxCapsule or something, I think).
Toby.
>name="DefaultDomain:service=XADataSource,name=OraclePool">
> OraclePool
> name="DataSourceClass">oracle.jdbc.xa.client.OracleXADataSource
> name="Properties">URL=jdbc:oracle:oci8:scott/tiger@orcl
>
>
> Shahar.
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RE: [JBoss-user] Solving Oracle Connection Pool Hanging
Apart from things like that in my code (bmp entities and stateless sessions)
:
Context ctx = new InitialContext();
DataSource ds = (DataSource)ctx.lookup("java:comp/env/jdbc/OracleDB");
conn = ds.getConnection();
...
jdbc bla bla bla
...
conn.close();
I have all my cmp beans using (jboss.xml) :
jdbc/OracleDB
OralceDB
OracleDB
java:/OraclePool
while (jboss.jcml):
OraclePool
oracle.jdbc.xa.client.OracleXADataSource
URL=jdbc:oracle:oci8:scott/tiger@orcl
Shahar.
-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED]]On Behalf Of Toby Allsopp
Sent: Monday, April 09, 2001 10:33 PM
To: [EMAIL PROTECTED]
Subject: Re: [JBoss-user] Solving Oracle Connection Pool Hanging
On Mon, Apr 09, 2001 at 10:05:43PM +0200, Shahar Solomianik wrote:
> Im pretty sure I do get my transactions managed by jboss. are you 100%
sure
> about that ?
I think we should make sure that we're talking about the same thing. Can
you post the code that uses the XADataSource, please?
Toby.
> Shahar.
>
> -Original Message-
> From: [EMAIL PROTECTED]
> [mailto:[EMAIL PROTECTED]]On Behalf Of Toby Allsopp
>
> On Mon, Apr 09, 2001 at 09:08:31PM +0200, Shahar Solomianik wrote:
> > Well, RawXADataSourceLoader works and XADataSourceLoader doesnt...
>
> I think you'll find that "works" is very limited in this case. You won't
> get your transactions managed by the container for one thing.
>
> > doesnt RawXADataSourceLoader pool connections ??? it should be
implemented
> > in the driver.
>
> Why should it be? Connection pooling is a service provided by the app
> server,
> not the JDBC driver. It may well be the case that Oracle's XADataSource
> implementation does do pooling, but this doesn't change the fact that your
> application component code shouldn't be dealing directly with XADataSource
> and XAConnection.
>
> Toby.
>
> > -Original Message-
> > From: [EMAIL PROTECTED]
> > [mailto:[EMAIL PROTECTED]]On Behalf Of Toby Allsopp
> >
> > RawXADataSourceLoader is not a replacement for XADataSourceLoader.
> >
> > The latter binds a DataSource implementation into JNDI which provides
> > connection pooling. The latter binds an XADataSource in JNDI, which
> provides
> > pretty much nothing that application components should be messing with.
> >
> > How are you using the XADataSource in your code?
> >
> > Toby.
> >
> > On Mon, Apr 09, 2001 at 04:48:00PM +0200, Shahar Solomianik wrote:
> > > yes.
> > > and use properties attribute instead the standard params, and Oracle
XA
> > > instead of minerva...
> > > this is from my jboss.jcml :
> > >> > name="DefaultDomain:service=XADataSource,name=OraclePool">
> > > OraclePool
> > >
name="DataSourceClass">oracle.jdbc.xa.client.OracleXADataSource
> > > > > name="Properties">URL=jdbc:oracle:oci8:scott/tiger@orcl
> > >
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Re: [JBoss-user] Solving Oracle Connection Pool Hanging
On Mon, Apr 09, 2001 at 10:05:43PM +0200, Shahar Solomianik wrote: > Im pretty sure I do get my transactions managed by jboss. are you 100% sure > about that ? I think we should make sure that we're talking about the same thing. Can you post the code that uses the XADataSource, please? Toby. > Shahar. > > -Original Message- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED]]On Behalf Of Toby Allsopp > > On Mon, Apr 09, 2001 at 09:08:31PM +0200, Shahar Solomianik wrote: > > Well, RawXADataSourceLoader works and XADataSourceLoader doesnt... > > I think you'll find that "works" is very limited in this case. You won't > get your transactions managed by the container for one thing. > > > doesnt RawXADataSourceLoader pool connections ??? it should be implemented > > in the driver. > > Why should it be? Connection pooling is a service provided by the app > server, > not the JDBC driver. It may well be the case that Oracle's XADataSource > implementation does do pooling, but this doesn't change the fact that your > application component code shouldn't be dealing directly with XADataSource > and XAConnection. > > Toby. > > > -Original Message- > > From: [EMAIL PROTECTED] > > [mailto:[EMAIL PROTECTED]]On Behalf Of Toby Allsopp > > > > RawXADataSourceLoader is not a replacement for XADataSourceLoader. > > > > The latter binds a DataSource implementation into JNDI which provides > > connection pooling. The latter binds an XADataSource in JNDI, which > provides > > pretty much nothing that application components should be messing with. > > > > How are you using the XADataSource in your code? > > > > Toby. > > > > On Mon, Apr 09, 2001 at 04:48:00PM +0200, Shahar Solomianik wrote: > > > yes. > > > and use properties attribute instead the standard params, and Oracle XA > > > instead of minerva... > > > this is from my jboss.jcml : > > >> > name="DefaultDomain:service=XADataSource,name=OraclePool"> > > > OraclePool > > > name="DataSourceClass">oracle.jdbc.xa.client.OracleXADataSource > > > > > name="Properties">URL=jdbc:oracle:oci8:scott/tiger@orcl > > > ___ JBoss-user mailing list [EMAIL PROTECTED] http://lists.sourceforge.net/lists/listinfo/jboss-user
RE: [JBoss-user] Solving Oracle Connection Pool Hanging
Im pretty sure I do get my transactions managed by jboss. are you 100% sure about that ? Shahar. -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of Toby Allsopp Sent: Monday, April 09, 2001 9:32 PM To: [EMAIL PROTECTED] Subject: Re: [JBoss-user] Solving Oracle Connection Pool Hanging On Mon, Apr 09, 2001 at 09:08:31PM +0200, Shahar Solomianik wrote: > Well, RawXADataSourceLoader works and XADataSourceLoader doesnt... I think you'll find that "works" is very limited in this case. You won't get your transactions managed by the container for one thing. > doesnt RawXADataSourceLoader pool connections ??? it should be implemented > in the driver. Why should it be? Connection pooling is a service provided by the app server, not the JDBC driver. It may well be the case that Oracle's XADataSource implementation does do pooling, but this doesn't change the fact that your application component code shouldn't be dealing directly with XADataSource and XAConnection. Toby. > -Original Message- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED]]On Behalf Of Toby Allsopp > Sent: Monday, April 09, 2001 8:47 PM > To: [EMAIL PROTECTED] > Subject: Re: [JBoss-user] Solving Oracle Connection Pool Hanging > > > RawXADataSourceLoader is not a replacement for XADataSourceLoader. > > The latter binds a DataSource implementation into JNDI which provides > connection pooling. The latter binds an XADataSource in JNDI, which provides > pretty much nothing that application components should be messing with. > > How are you using the XADataSource in your code? > > Toby. > > On Mon, Apr 09, 2001 at 04:48:00PM +0200, Shahar Solomianik wrote: > > yes. > > and use properties attribute instead the standard params, and Oracle XA > > instead of minerva... > > this is from my jboss.jcml : > >> name="DefaultDomain:service=XADataSource,name=OraclePool"> > > OraclePool > > > > name="DataSourceClass">oracle.jdbc.xa.client.OracleXADataSource > > > name="Properties">URL=jdbc:oracle:oci8:scott/tiger@orcl > > ___ JBoss-user mailing list [EMAIL PROTECTED] http://lists.sourceforge.net/lists/listinfo/jboss-user ___ JBoss-user mailing list [EMAIL PROTECTED] http://lists.sourceforge.net/lists/listinfo/jboss-user
Re: [JBoss-user] Solving Oracle Connection Pool Hanging
On Mon, Apr 09, 2001 at 09:08:31PM +0200, Shahar Solomianik wrote: > Well, RawXADataSourceLoader works and XADataSourceLoader doesnt... I think you'll find that "works" is very limited in this case. You won't get your transactions managed by the container for one thing. > doesnt RawXADataSourceLoader pool connections ??? it should be implemented > in the driver. Why should it be? Connection pooling is a service provided by the app server, not the JDBC driver. It may well be the case that Oracle's XADataSource implementation does do pooling, but this doesn't change the fact that your application component code shouldn't be dealing directly with XADataSource and XAConnection. Toby. > -Original Message- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED]]On Behalf Of Toby Allsopp > Sent: Monday, April 09, 2001 8:47 PM > To: [EMAIL PROTECTED] > Subject: Re: [JBoss-user] Solving Oracle Connection Pool Hanging > > > RawXADataSourceLoader is not a replacement for XADataSourceLoader. > > The latter binds a DataSource implementation into JNDI which provides > connection pooling. The latter binds an XADataSource in JNDI, which provides > pretty much nothing that application components should be messing with. > > How are you using the XADataSource in your code? > > Toby. > > On Mon, Apr 09, 2001 at 04:48:00PM +0200, Shahar Solomianik wrote: > > yes. > > and use properties attribute instead the standard params, and Oracle XA > > instead of minerva... > > this is from my jboss.jcml : > >> name="DefaultDomain:service=XADataSource,name=OraclePool"> > > OraclePool > > > > name="DataSourceClass">oracle.jdbc.xa.client.OracleXADataSource > > > name="Properties">URL=jdbc:oracle:oci8:scott/tiger@orcl > > ___ JBoss-user mailing list [EMAIL PROTECTED] http://lists.sourceforge.net/lists/listinfo/jboss-user
RE: [JBoss-user] Solving Oracle Connection Pool Hanging
Well, RawXADataSourceLoader works and XADataSourceLoader doesnt... doesnt RawXADataSourceLoader pool connections ??? it should be implemented in the driver. -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of Toby Allsopp Sent: Monday, April 09, 2001 8:47 PM To: [EMAIL PROTECTED] Subject: Re: [JBoss-user] Solving Oracle Connection Pool Hanging RawXADataSourceLoader is not a replacement for XADataSourceLoader. The latter binds a DataSource implementation into JNDI which provides connection pooling. The latter binds an XADataSource in JNDI, which provides pretty much nothing that application components should be messing with. How are you using the XADataSource in your code? Toby. On Mon, Apr 09, 2001 at 04:48:00PM +0200, Shahar Solomianik wrote: > yes. > and use properties attribute instead the standard params, and Oracle XA > instead of minerva... > this is from my jboss.jcml : >name="DefaultDomain:service=XADataSource,name=OraclePool"> > OraclePool > name="DataSourceClass">oracle.jdbc.xa.client.OracleXADataSource > name="Properties">URL=jdbc:oracle:oci8:scott/tiger@orcl > ___ JBoss-user mailing list [EMAIL PROTECTED] http://lists.sourceforge.net/lists/listinfo/jboss-user ___ JBoss-user mailing list [EMAIL PROTECTED] http://lists.sourceforge.net/lists/listinfo/jboss-user
Re: [JBoss-user] Solving Oracle Connection Pool Hanging
RawXADataSourceLoader is not a replacement for XADataSourceLoader. The latter binds a DataSource implementation into JNDI which provides connection pooling. The latter binds an XADataSource in JNDI, which provides pretty much nothing that application components should be messing with. How are you using the XADataSource in your code? Toby. On Mon, Apr 09, 2001 at 04:48:00PM +0200, Shahar Solomianik wrote: > yes. > and use properties attribute instead the standard params, and Oracle XA > instead of minerva... > this is from my jboss.jcml : >name="DefaultDomain:service=XADataSource,name=OraclePool"> > OraclePool > name="DataSourceClass">oracle.jdbc.xa.client.OracleXADataSource > name="Properties">URL=jdbc:oracle:oci8:scott/tiger@orcl > ___ JBoss-user mailing list [EMAIL PROTECTED] http://lists.sourceforge.net/lists/listinfo/jboss-user
RE: [JBoss-user] Solving Oracle Connection Pool Hanging
yes. and use properties attribute instead the standard params, and Oracle XA instead of minerva... this is from my jboss.jcml : OraclePool oracle.jdbc.xa.client.OracleXADataSource URL=jdbc:oracle:oci8:scott/tiger@orcl -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of Simphoukham, Southin Sent: Monday, April 09, 2001 2:15 PM To: '[EMAIL PROTECTED]' Subject: RE: [JBoss-user] Solving Oracle Connection Pool Hanging Shahar, How do you do that? Do you replace org.jboss.jdbc.XADataSourceLoader? OracleDB org.opentools.minerva.jdbc.xa.wrapper.XADataSourceImp l Southin -Original Message- From: Shahar Solomianik [mailto:[EMAIL PROTECTED]] Sent: Monday, April 09, 2001 6:23 AM To: [EMAIL PROTECTED] Subject: RE: [JBoss-user] Solving Oracle Connection Pool Hanging Use RawXADataSource and it works (at least for me) -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of Tim Taylor Sent: Saturday, April 07, 2001 11:56 PM To: [EMAIL PROTECTED] Subject: Re: [JBoss-user] Solving Oracle Connection Pool Hanging I tend to agree that the JBoss-blocking behavior of incorrectly set up XADataSources is a bug. I ran into this too, and judging from the number of "Oracle pool hanging" messages on this list, a lot of people are running into it. I think it happens at the end of the pool creation when XADataSourceLoader of JBoss does a quick call to check the health of the Minerva XADataSource. The health check hangs waiting for a connection from the source. If the data source is set up incorrectly in any way, the pool will never contain a connection to allocate, and the call hangs. I think a call to an XADataSource.getConnection() should get an SQLException when the underlying connection factory (in this case, in the excellent Minerva) gets an SQLException. My $0.02. Tim Taylor Tim Kemp wrote: > I too have suffered from the Oracle Connection Pool hanging JBoss 2.1 on > startup. > > By adding the following line to the Datasource mbean (in jboss.jcml), the > exact error is displayed in the JBoss output. > > true > > In my case it was an incorrect database instance that caused the connection > pool to hand > > [OraclePool] Starting > [OraclePool] XA Connection pool OraclePool bound to java:/OraclePool > [OraclePool] java.sql.SQLException: Io exception: Connection > refused(DESCRIPTION > =(TMP=)(VSNNUM=135294976)(ERR=12505)(ERROR_STACK=(ERROR=(CODE=12505)(EMFI=4) > ))) > [OraclePool] Pool OraclePool factory > org.opentools.minerva.jdbc.xa.XAConnectionF > actory@6ac461 unable to create new object! > [OraclePool] Pool OraclePool [0/0/10] waiting for a free object <<<<< > Surely this is a problem in JBoss! >>>>> > > So the connection pool couldn't connect to Oracle - causing JBoss to hang > while it was waiting for a free connection, which could never be returned > cos the connection failed! > > Tim > > ___ > JBoss-user mailing list > [EMAIL PROTECTED] > http://lists.sourceforge.net/lists/listinfo/jboss-user ___ JBoss-user mailing list [EMAIL PROTECTED] http://lists.sourceforge.net/lists/listinfo/jboss-user ___ JBoss-user mailing list [EMAIL PROTECTED] http://lists.sourceforge.net/lists/listinfo/jboss-user ___ JBoss-user mailing list [EMAIL PROTECTED] http://lists.sourceforge.net/lists/listinfo/jboss-user ___ JBoss-user mailing list [EMAIL PROTECTED] http://lists.sourceforge.net/lists/listinfo/jboss-user
RE: [JBoss-user] Solving Oracle Connection Pool Hanging
Shahar, How do you do that? Do you replace org.jboss.jdbc.XADataSourceLoader? OracleDB org.opentools.minerva.jdbc.xa.wrapper.XADataSourceImp l Southin -Original Message- From: Shahar Solomianik [mailto:[EMAIL PROTECTED]] Sent: Monday, April 09, 2001 6:23 AM To: [EMAIL PROTECTED] Subject: RE: [JBoss-user] Solving Oracle Connection Pool Hanging Use RawXADataSource and it works (at least for me) -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of Tim Taylor Sent: Saturday, April 07, 2001 11:56 PM To: [EMAIL PROTECTED] Subject: Re: [JBoss-user] Solving Oracle Connection Pool Hanging I tend to agree that the JBoss-blocking behavior of incorrectly set up XADataSources is a bug. I ran into this too, and judging from the number of "Oracle pool hanging" messages on this list, a lot of people are running into it. I think it happens at the end of the pool creation when XADataSourceLoader of JBoss does a quick call to check the health of the Minerva XADataSource. The health check hangs waiting for a connection from the source. If the data source is set up incorrectly in any way, the pool will never contain a connection to allocate, and the call hangs. I think a call to an XADataSource.getConnection() should get an SQLException when the underlying connection factory (in this case, in the excellent Minerva) gets an SQLException. My $0.02. Tim Taylor Tim Kemp wrote: > I too have suffered from the Oracle Connection Pool hanging JBoss 2.1 on > startup. > > By adding the following line to the Datasource mbean (in jboss.jcml), the > exact error is displayed in the JBoss output. > > true > > In my case it was an incorrect database instance that caused the connection > pool to hand > > [OraclePool] Starting > [OraclePool] XA Connection pool OraclePool bound to java:/OraclePool > [OraclePool] java.sql.SQLException: Io exception: Connection > refused(DESCRIPTION > =(TMP=)(VSNNUM=135294976)(ERR=12505)(ERROR_STACK=(ERROR=(CODE=12505)(EMFI=4) > ))) > [OraclePool] Pool OraclePool factory > org.opentools.minerva.jdbc.xa.XAConnectionF > actory@6ac461 unable to create new object! > [OraclePool] Pool OraclePool [0/0/10] waiting for a free object <<<<< > Surely this is a problem in JBoss! >>>>> > > So the connection pool couldn't connect to Oracle - causing JBoss to hang > while it was waiting for a free connection, which could never be returned > cos the connection failed! > > Tim > > ___ > JBoss-user mailing list > [EMAIL PROTECTED] > http://lists.sourceforge.net/lists/listinfo/jboss-user ___ JBoss-user mailing list [EMAIL PROTECTED] http://lists.sourceforge.net/lists/listinfo/jboss-user ___ JBoss-user mailing list [EMAIL PROTECTED] http://lists.sourceforge.net/lists/listinfo/jboss-user ___ JBoss-user mailing list [EMAIL PROTECTED] http://lists.sourceforge.net/lists/listinfo/jboss-user
RE: [JBoss-user] Solving Oracle Connection Pool Hanging
Use RawXADataSource and it works (at least for me) -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of Tim Taylor Sent: Saturday, April 07, 2001 11:56 PM To: [EMAIL PROTECTED] Subject: Re: [JBoss-user] Solving Oracle Connection Pool Hanging I tend to agree that the JBoss-blocking behavior of incorrectly set up XADataSources is a bug. I ran into this too, and judging from the number of "Oracle pool hanging" messages on this list, a lot of people are running into it. I think it happens at the end of the pool creation when XADataSourceLoader of JBoss does a quick call to check the health of the Minerva XADataSource. The health check hangs waiting for a connection from the source. If the data source is set up incorrectly in any way, the pool will never contain a connection to allocate, and the call hangs. I think a call to an XADataSource.getConnection() should get an SQLException when the underlying connection factory (in this case, in the excellent Minerva) gets an SQLException. My $0.02. Tim Taylor Tim Kemp wrote: > I too have suffered from the Oracle Connection Pool hanging JBoss 2.1 on > startup. > > By adding the following line to the Datasource mbean (in jboss.jcml), the > exact error is displayed in the JBoss output. > > true > > In my case it was an incorrect database instance that caused the connection > pool to hand > > [OraclePool] Starting > [OraclePool] XA Connection pool OraclePool bound to java:/OraclePool > [OraclePool] java.sql.SQLException: Io exception: Connection > refused(DESCRIPTION > =(TMP=)(VSNNUM=135294976)(ERR=12505)(ERROR_STACK=(ERROR=(CODE=12505)(EMFI=4) > ))) > [OraclePool] Pool OraclePool factory > org.opentools.minerva.jdbc.xa.XAConnectionF > actory@6ac461 unable to create new object! > [OraclePool] Pool OraclePool [0/0/10] waiting for a free object <<<<< > Surely this is a problem in JBoss! >>>>> > > So the connection pool couldn't connect to Oracle - causing JBoss to hang > while it was waiting for a free connection, which could never be returned > cos the connection failed! > > Tim > > ___ > JBoss-user mailing list > [EMAIL PROTECTED] > http://lists.sourceforge.net/lists/listinfo/jboss-user ___ JBoss-user mailing list [EMAIL PROTECTED] http://lists.sourceforge.net/lists/listinfo/jboss-user ___ JBoss-user mailing list [EMAIL PROTECTED] http://lists.sourceforge.net/lists/listinfo/jboss-user
Re: [JBoss-user] Solving Oracle Connection Pool Hanging
I tend to agree that the JBoss-blocking behavior of incorrectly set up XADataSources is a bug. I ran into this too, and judging from the number of "Oracle pool hanging" messages on this list, a lot of people are running into it. I think it happens at the end of the pool creation when XADataSourceLoader of JBoss does a quick call to check the health of the Minerva XADataSource. The health check hangs waiting for a connection from the source. If the data source is set up incorrectly in any way, the pool will never contain a connection to allocate, and the call hangs. I think a call to an XADataSource.getConnection() should get an SQLException when the underlying connection factory (in this case, in the excellent Minerva) gets an SQLException. My $0.02. Tim Taylor Tim Kemp wrote: > I too have suffered from the Oracle Connection Pool hanging JBoss 2.1 on > startup. > > By adding the following line to the Datasource mbean (in jboss.jcml), the > exact error is displayed in the JBoss output. > > true > > In my case it was an incorrect database instance that caused the connection > pool to hand > > [OraclePool] Starting > [OraclePool] XA Connection pool OraclePool bound to java:/OraclePool > [OraclePool] java.sql.SQLException: Io exception: Connection > refused(DESCRIPTION > =(TMP=)(VSNNUM=135294976)(ERR=12505)(ERROR_STACK=(ERROR=(CODE=12505)(EMFI=4) > ))) > [OraclePool] Pool OraclePool factory > org.opentools.minerva.jdbc.xa.XAConnectionF > actory@6ac461 unable to create new object! > [OraclePool] Pool OraclePool [0/0/10] waiting for a free object < > Surely this is a problem in JBoss! > > > So the connection pool couldn't connect to Oracle - causing JBoss to hang > while it was waiting for a free connection, which could never be returned > cos the connection failed! > > Tim > > ___ > JBoss-user mailing list > [EMAIL PROTECTED] > http://lists.sourceforge.net/lists/listinfo/jboss-user ___ JBoss-user mailing list [EMAIL PROTECTED] http://lists.sourceforge.net/lists/listinfo/jboss-user
Re: [JBoss-user] Solving Oracle Connection Pool Hanging
that's exactly what you're supposed to do. "Simphoukham, Southin" wrote: > > Tim > > Do you know of a work around? In my code I have been closing connections, > therefore releasing them back to the pool. > > Thanks, > > Southin Confidential e-mail for addressee only. Access to this e-mail by anyone else is unauthorized. If you have received this message in error, please notify the sender immediately by reply e-mail and destroy the original communication. ___ JBoss-user mailing list [EMAIL PROTECTED] http://lists.sourceforge.net/lists/listinfo/jboss-user
RE: [JBoss-user] Solving Oracle Connection Pool Hanging
Tim Do you know of a work around? In my code I have been closing connections, therefore releasing them back to the pool. Thanks, Southin -Original Message- From: Tim Kemp [mailto:[EMAIL PROTECTED]] Sent: Thursday, April 05, 2001 9:09 AM To: 'Jboss-User (E-mail) Subject: [JBoss-user] Solving Oracle Connection Pool Hanging I too have suffered from the Oracle Connection Pool hanging JBoss 2.1 on startup. By adding the following line to the Datasource mbean (in jboss.jcml), the exact error is displayed in the JBoss output. true In my case it was an incorrect database instance that caused the connection pool to hand [OraclePool] Starting [OraclePool] XA Connection pool OraclePool bound to java:/OraclePool [OraclePool] java.sql.SQLException: Io exception: Connection refused(DESCRIPTION =(TMP=)(VSNNUM=135294976)(ERR=12505)(ERROR_STACK=(ERROR=(CODE=12505)(EMFI=4) ))) [OraclePool] Pool OraclePool factory org.opentools.minerva.jdbc.xa.XAConnectionF actory@6ac461 unable to create new object! [OraclePool] Pool OraclePool [0/0/10] waiting for a free object <<<<< Surely this is a problem in JBoss! >>>>> So the connection pool couldn't connect to Oracle - causing JBoss to hang while it was waiting for a free connection, which could never be returned cos the connection failed! Tim ___ JBoss-user mailing list [EMAIL PROTECTED] http://lists.sourceforge.net/lists/listinfo/jboss-user ___ JBoss-user mailing list [EMAIL PROTECTED] http://lists.sourceforge.net/lists/listinfo/jboss-user
[JBoss-user] Solving Oracle Connection Pool Hanging
I too have suffered from the Oracle Connection Pool hanging JBoss 2.1 on startup. By adding the following line to the Datasource mbean (in jboss.jcml), the exact error is displayed in the JBoss output. true In my case it was an incorrect database instance that caused the connection pool to hand [OraclePool] Starting [OraclePool] XA Connection pool OraclePool bound to java:/OraclePool [OraclePool] java.sql.SQLException: Io exception: Connection refused(DESCRIPTION =(TMP=)(VSNNUM=135294976)(ERR=12505)(ERROR_STACK=(ERROR=(CODE=12505)(EMFI=4) ))) [OraclePool] Pool OraclePool factory org.opentools.minerva.jdbc.xa.XAConnectionF actory@6ac461 unable to create new object! [OraclePool] Pool OraclePool [0/0/10] waiting for a free object < Surely this is a problem in JBoss! > So the connection pool couldn't connect to Oracle - causing JBoss to hang while it was waiting for a free connection, which could never be returned cos the connection failed! Tim ___ JBoss-user mailing list [EMAIL PROTECTED] http://lists.sourceforge.net/lists/listinfo/jboss-user
