We had this issue with production apps locking up on hsql, even without restarting.  
Hsql seems buggy in single-user mode so I would highly recommend, NOT using hsql for 
this reason.

-scott

> -----Original Message-----
> From: Jacob Kjome [mailto:[EMAIL PROTECTED]
> Sent: Wednesday, March 12, 2003 11:51 AM
> To: Jetspeed Users List
> Subject: Re[2]: Sessions and Restarting Jetspeed
> 
> Hello Ryan,
> 
> Seems to me that when I ran into problems after restarting the app via
> the Tomcat manager app, the problem was that Jetspeed was not able to
> write stuff to the hsqldb database files because another process had a
> handle on those files.  Restarting Tomcat fully resolves this issue.
> So, it seems as if hsqldb isn't releasing the files when it is shut
> down.  Somehow the JVM keeps a handle on the files.  Is this what
> people are seeing and confusing it with session problems or am I just
> seeing a completely different issue here?
> 
> Jake
> 
> Wednesday, March 12, 2003, 10:26:21 AM, you wrote:
> 
> RC> I get the same problem, and sometimes I get a horrible exception,
> RC> sometimes and out of memory error. This usually happens after I use
> the
> RC> manger app to reload the application about 8-10 times. If I stop
> tomcat,
> RC> then start it back up problems go away.
> 
> RC> Mark Orciuch wrote:
> 
> >>I believe this has to do with Tomcat attempting to restore the sessions
> upon
> >>restart. Here are some related posts:
> >>
> >>http://www.mail-archive.com/jetspeed-
> [EMAIL PROTECTED]/msg07902.html
> >>http://www.mail-archive.com/turbine-
> user%40jakarta.apache.org/msg11325.html
> >>
> >>Best regards,
> >>
> >>Mark Orciuch - [EMAIL PROTECTED]
> >>Jakarta Jetspeed - Enterprise Portal in Java
> >>http://jakarta.apache.org/jetspeed/
> >>
> >>
> >>
> >>>-----Original Message-----
> >>>From: Jarrell, Maury [mailto:[EMAIL PROTECTED]
> >>>Sent: Wednesday, March 12, 2003 8:45 AM
> >>>To: 'Jetspeed Users List'
> >>>Subject: Sessions and Restarting Jetspeed
> >>>
> >>>
> >>>Hello all,
> >>>
> >>>I've been lurking on this list for quite some time and appreciate all
> the
> >>>help people provide here.
> >>>
> >>>I've been tinkering with Jetspeed ( 1.4b3 on Tomcat 4.12 ):  setting up
> >>>simple HTML portlets in the registry and such.  To do this I
> >>>first tried the
> >>>manager app in Tomcat to shutdown Jetspeed, make my changes and
> >>>then restart
> >>>Jetspeed.  Later I tried shutting down Tomcat altogether, making
> changes,
> >>>and then restarting.  When I try to log back in to Jetspeed, I
> >>>get "Horrible
> >>>Exception Errors" that I surmise are the result of my browser
> >>>hanging on to
> >>>a session id or some such that the new instance of Jetspeed knows
> nothing
> >>>about.  It takes several minutes before I'm able to connect again
> >>>and it is
> >>>slowing my progress significantly.  I'm sure there is a silly thing I'm
> >>>overlooking, but need a nudge in the right direction.  So my
> >>>questions are:
> >>>1.  Is my guess correct, or is something else going on?  and 2.  How
> can I
> >>>overcome this nuisance?
> >>>
> >>>Thanks,
> >>>Maury Jarrell
> >>>
> >>>
> >>>
> >>>
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> >>>
> >>>
> >>
> >>
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> >>
> >>
> 
> 
> 
> RC> ---------------------------------------------------------------------
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> 
> 
> 
> --
> Best regards,
>  Jacob                            mailto:[EMAIL PROTECTED]
> 
> 
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