[kepler-dev] Multiple instances of kepler
cxh at eecs.berkeley.edu
Thu Jan 25 16:27:21 PST 2007
is marked as resolved and wontfix.
> 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.
This bug precludes a user using two copies of Kepler on a big server.
Maybe a better error message would help?
I have just realized now that currently, I am not able to execute two
instances of Kepler. Which is not my intention in case of the GUI, but
I cannot execute two workflows on the same machine from command-line.
There was a case last Fall when a physicist executed the same workflow ten
times at once (from a script of course) to speed up his data transfer.
Does the execution part of Kepler need exclusiveness or this is just the
GUI? Should this be considered as a bug? Any workarounds?
How does this affect portal/dashboard building people, when workflows are
executed in the background on a server?
Caused by: java.sql.SQLException: The database is already in use by
another process: org.hsqldb.NIOLockFile at 940a0831[file
locked=false, valid=false, fl =null]: java.lang.Exception:
checkHeartbeat(): lock file
[/home/pnorbert/.kepler/cache/cachedata/hsqldb.lck] is presumably locked
by another process.
University of California, Davis
Department of Computer Science
1 Shields Ave, 2236 Kemper Hall
Davis, CA 95616
pnorbert at cs.ucdavis.edu
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