[kepler-dev] Kepler can only be invoked once

[Christopher Brooks]

Hi Norbert,

Your solution will probably run Ptolemy models that do not use the UI.
I'm not sure if it will run Kepler models that do anything fancy with
ontologies etc.

Also, I had to set the classpath.  
I got:
--start--
#! /bin/bash
java -Xmx512m -Xss5m -DKEPLER="$KEPLER" \
     -classpath "${PTII};${KEPLER}" \
     -Djava.endorsed.dirs=$KEPLER/lib/jar/apache \
     -Djava.library.path=$KEPLER/lib
     ptolemy.actor.gui.MoMLSimpleApplication $*
--end--

For info about invoking Ptolemy II, see
http://ptolemy.berkeley.edu/ptolemyII/ptIIfaq.htm#invoking%20Ptolemy%20II?


However, invoking Kepler twice on the same machine via "ant run-dev"
does not work.  I get:

     [java] Caused by: java.sql.SQLException: The database is already
     in use by another process: org.hsqldb.NIOLockFile at f0f563da[file =C:\Documents
     and Settings\cxh\.kepler\cache\cachedata\hsqldb.lck, exists=true, locked=false,
     valid=false,fl =null]: java.lang.Exception: The process cannot access the file
     because another process has locked a portion of the file :
     C:\Documents and Settings\cxh\.kepler\cache\cachedata\hsqldb.lck
     [java]     at org.hsqldb.jdbc.jdbcUtil.sqlException(Unknown Source)
     [java]     at org.hsqldb.jdbc.jdbcConnection.<init>(Unknown Source)
     [java]     at org.hsqldb.jdbcDriver.getConnection(Unknown Source)
     [java]     at org.hsqldb.jdbcDriver.connect(Unknown Source)
     [java]     at java.sql.DriverManager.getConnection(DriverManager.java:525)
     [java]     at java.sql.DriverManager.getConnection(DriverManager.java:171)
     [java]     at org.ecoinformatics.util.DBConnectionFactory.getDBConnection(DBConnectionFactory.java:91)
     [java]     at org.ecoinformatics.util.DBConnectionFactory.getDBConnection(DBConnectionFactory.java:73)
     [java]     at org.kepler.gui.KeplerInitializer.initializeSystem(KeplerInitializer.java:133)
     [java]     at org.kepler.gui.KeplerInitializer.<init>(KeplerInitializer.java:80)
     [java]     at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
     [java]     at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)
     [java]     at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
     [java]     at java.lang.reflect.Constructor.newInstance(Constructor.java:494)
     [java]     at java.lang.Class.newInstance0(Class.java:350)
     [java]     at java.lang.Class.newInstance(Class.java:303)
     [java]     at ptolemy.actor.gui.MoMLApplication.readConfiguration(MoMLApplication.java:396)
     [java]     ... 14 more

BUILD SUCCESSFUL
Total time: 9 seconds



See
http://bugzilla.ecoinformatics.org/show_bug.cgi?id=2315
This bug was marked as WONTFIX by Chad, who wrote:

> The only way we could fix this is to have multiple .kepler
> directories on one machine. This would require a profiling system
> like morpho has.  Since I don't think this is on our list of things
> to do, i'm going to mark this WONTFIX.  If at some point we add a
> profile system, possibly when we add authentication, this problem
> should be fixed.

_Christopher


--------

    Hi Lisong,
    
    If you want to execute workflows from command-line, just create a script 
    similar to kepler.sh and replace the java command for the following:
    
    java -Xmx512m -Xss5m -DKEPLER="$KEPLER" 
    -Djava.endorsed.dirs=$KEPLER/lib/jar/apache 
    -Djava.library.path=$KEPLER/lib ptolemy.actor.gui.MoMLSimpleApplication $*
    
    (note, KEPLER should be defined for the above script)
    
    This can be executed several times at once, giving the workflow name as 
    parameter.
    
    Best regards
    Norbert
    
          Norbert Podhorszki
        ------------------------------------
          University of California, Davis
          Department of Computer Science
          1 Shields Ave, 2236 Kemper Hall
          Davis, CA 95616
          (530) 752-5076
          pnorbert at cs.ucdavis.edu
          ----------------------------------
    
    On Thu, 10 May 2007, Sun, Lisong wrote:
    
    > Dear Kepler developers,
    >
    > Our group is developing a process integration framework which use Kepler 
   to
    > build and run workflows to do scientific computations. We built an organi
   zer
    > application that will manage the workflow files on the WebDAV server,
    > input/output for each run and other provenance information.
    >
    > So far we are very impressed by the capabilities of Kepler. Meanwhile we 
   do
    > run into a few problems that we are not sure how to deal with.
    >
    > One of the problem is that we found Kepler can only be invoked once. And 
   if
    > there is a running Kepler, the second invoke command will fail. This does
    > get in our way of using the Kepler since we manage all the workflow files
    > using our organizer and need to be able to invoke multiple workflows thro
   ugh
    > the organizer. We do noticed that it is possible to open multiple workflo
   ws
    > windows through the menu options. Wonder if there is any special reason w
   hy
    > it can't run with second invoke command.
    >
    > Another goal we want to achieve is to deal with long running workflows. I
    > wonder if there is anyway we can use the Kepler as an execution engine an
   d
    > run workflows without open the GUI window.
    >
    > Thanks for your help.
    >
    > Best regards,
    >
    > Lisong Sun
    > Staff Scientist
    > Pacific Northwest National Laboratory
    > _______________________________________________
    > Kepler-dev mailing list
    > Kepler-dev at ecoinformatics.org
    > http://mercury.nceas.ucsb.edu/ecoinformatics/mailman/listinfo/kepler-dev
    >
    
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--------