Shutdown Hsqldb server when no more clients are connected - hsqldb

Question

I start a hsqldb 1.8 server like this:
java -cp "%classpath%;.;Y:\PlantOperations\bldPlantOperations\code\lib\jboss\hsqldb-1.8.0-10.jar;C:\Documents and Settings\BThirup\Application Data\Rockwell Automation\FactoryTalk ProductionCentre\ProcessDesigner\hsqldb-1.8.0-10.jar;C:\Documents and Settings\BThirup\Application Data\Rockwell Automation\FactoryTalk ProductionCentre\ShopOperation\hsqldb-1.8.0-10.jar;" org.hsqldb.Server -database.0 file:"C:\Documents and Settings\BThirup\Application Data\Rockwell Automation\FactoryTalk ProductionCentre\logs\ApplicationLog\mydb" -dbname.0 xdb
I have multiple clients which connect(in no particular order) using jdbc:hsqldb:hsql://localhost/xdb;shutdown=true
I want to shutdown Hsqldb server when no more clients are connected.
I read in docs that adding shutdown=true as I have in jdbc url would cause hsqldb to shutdown after no more clients are connected. But I do not see that happening.
I also tried
Properties info = new Properties();
info.put("user", "SA");
info.put("password", "");
info.put("shutdown", "true");
conn = DriverManager.getConnection(dbString, info);
The above also does not cause hsqldb server to shutdown after the last client disconnects.
Any help on this is appreciated
Bala

Answer 1

The shutdown=true property works with the in-process connection, not via the server connection.
It may work if you add this property to the database URL in the server startup. This would cause the database to shutdown, which in turn would cause the server to shutdown.
java -cp ... org.hsqldb.Server -database.0 file:"C:\Documents and Settings\BThirup\Application Data\Rockwell Automation\FactoryTalk ProductionCentre\logs\ApplicationLog\mydb;shutdown=true" -dbname.0 xdb
Unrelated to this, you need only one reference to the hsqldb-1.8.0-10.jar in your classpath.