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Subject: RE: Exception in thread "main"
Date: Thu, 4 Sep 2003 10:07:20 +0200
Message-ID: 
 <3AFF22A81FF2F94AB721A1BD98E2C1E308664C@corusbo.corp.corustechnologies.com>
Thread-Topic: Exception in thread "main"
Thread-Index: AcNyO3BIlDzcjXcWQGCrr51LtRxxCwAe6USQ
From: =?iso-8859-1?Q?Johan_Adel=F6w?= <Johan.Adelow@corustechnologies.com>
To: "Ant Users List" <user@ant.apache.org>

In that case, just send me the JDBCTask, I would have to recompile ant =
anyway
because we have some tasks of our own that we put into ant.jar. I think =
the
<sql> task is called about 50 times, which would be about 50M which i =
dont
think is that much. Im trying to get hold the tool OptimizeIt here to =
see
what acctualy happends, but right now the cd=B4s are at drift.

/Johan

-----Original Message-----
From: Antoine Levy-Lambert [mailto:antoine@antbuild.com]
Sent: den 3 september 2003 18:25
To: Ant Users List
Subject: Re: Exception in thread "main"


I have just had a look at the code of the sql task and of the JDBCTask =
that
the sql task is using internally.
There is a caching mechanism (to cache class loaders) in the JDBCTask, =
but
it is not used.
So you are right, it is well possible that new class loaders and driver
instances are generated each time you execute the sqltask.
I do not know if/when garbage collection will reclaim them.
To get an idea, how many times is the <sql/> task called in your build ?

If I patch ant1.6alpha to try to fix your problem, would you be able to =
test
with 1.6 to see if you are happy ?

Cheers,

Antoine


----- Original Message -----
From: "Johan Adel=F6w" <Johan.Adelow@corustechnologies.com>
To: "Ant Users List" <user@ant.apache.org>
Sent: Wednesday, September 03, 2003 11:53 AM
Subject: RE: Exception in thread "main"


Im running Ant version 1.5.3 on a Sun Solaris 5.8, but we have had this
problem on windows also.
Actually I found (after reading your mail) that we launched ant with the
<exec> inside the script at one occation, and that=B4s why the [exec] =
turnd up
in the log, but this was not the problem.
I still get the "Exception in thread main" but in another place.

We do use the sqltask to launch all the database stuff.
What I am afraid of is that ant is loading the database driver each time =
we
use the <sql> task.

...
     [java] File length: 158892

     [java] Connected to  jdbc:oracle:thin:@elvis:1521:DB
     [java] User          nisse
     [java] Driver        Oracle JDBC driver
     [java] DriverVersion 9.0.1.0.0
     [java] IsJDBCcompl   true

     [echo] Done installing corus broker!

start:
     [exec] =
/test/ninstall/3_1/install/corus31/CorusWeb/lws/bin/lwsctrl.sh
start: lws started
     [exec] =
/test/ninstall/3_1/install/corus31/CorusBroker/bin/brokctrl.sh
start: broker started
Exception in thread "main"


-----Original Message-----
From: Antoine Levy-Lambert [mailto:antoine@antbuild.com]
Sent: den 2 september 2003 15:44
To: Ant Users List
Subject: Re: Exception in thread "main"


Hi Johan,
can you tell against which version of ant and which OS are you using ?
also if you are basically running a SQL script, it might be worthwhile =
to
use the <sql/> task rather than <exec/>
Also your log files seem to indicate that you are doing the following :

- starting a script or a program with the <exec/> task,
- this script or program is using the ant API to run the <java/> task,
- the java task does database operations

If this makes sense, you might want to refactor your build to :
1) generate a sql batch file containing the SQL statements you want to
execute
    insert into foo (bar, doe) values ('mybar', 'mydoe');
    ...
2) using the <sql/> task, execute the batch

Just ideas, I do not know for sure how your build is structured or what =
are
your constraints.

Antoine L=E9vy-Lambert

----- Original Message -----
From: "Johan Adel=F6w" <Johan.Adelow@corustechnologies.com>
To: "Ant Users List (E-mail)" <ant-user@jakarta.apache.org>
Sent: Tuesday, September 02, 2003 1:52 PM
Subject: Exception in thread "main"


Hi
Im experiencing what I think is a memory problem. I have a large build
including several scripts that has quite alot database interaction.
At the end of the run I suddenly get an Exception in thread "main" and =
the
build fails.
If I manualy run the scripts one by one there is no problem.

I've set up the memory parameter (-Xmx512m) to 500mb in the antscript =
but it
does not help.

Has anyone encountered/solved this problem?


     [exec]      [echo] Loading log4j_1.1.3.jar
     [exec]      [java] File name:
/test/ninstall/3_1/install/corus31/corus/3_1_0/lib/providers/openjms/log4=
j_1
.
1.3.jar
     [exec]      [java] File length: 158892

     [exec]      [java] Connected to  jdbc:oracle:thin:@elvis:1521:DB
     [exec]      [java] User          nisse
     [exec]      [java] Driver        Oracle JDBC driver
     [exec]      [java] DriverVersion 9.0.1.0.0
     [exec]      [java] IsJDBCcompl   true

      [exec]      [echo] Done installing broker!
      [exec] Exception in thread "main"

BUILD FAILED
file:/test/ninstall/3_1/bin/testenv_install_corus.xml:51: exec returned: =
1

Total time: 46 minutes 49 seconds
bash-2.03$

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