On 1/28/2013 12:52 PM, Oskar Zinger wrote:
When I do the following it sometimes returns a NullPointerException:

      DriverManager.getConnection("jdbc:derby:;shutdown=true;deregister=false");

Here is the exception stack trace:

Caused by: java.lang.NullPointerException
        at org.apache.derby.impl.store.raw.xact.XactFactory.add(Unknown Source)
        at org.apache.derby.impl.store.raw.xact.XactFactory.pushTransactionContext(Unknown Source)
        at org.apache.derby.impl.store.raw.xact.XactFactory.startInternalTransaction(Unknown Source)
        at org.apache.derby.impl.store.raw.log.LogToFile.checkpointWithTran(Unknown Source)
        at org.apache.derby.impl.store.raw.log.LogToFile.checkpoint(Unknown Source)
        at org.apache.derby.impl.store.raw.RawStore.stop(Unknown Source)
        at org.apache.derby.impl.services.monitor.TopService.stop(Unknown Source)
        at org.apache.derby.impl.services.monitor.TopService.shutdown(Unknown Source)
        at org.apache.derby.impl.services.monitor.BaseMonitor.shutdown(Unknown Source)
        at org.apache.derby.impl.services.monitor.BaseMonitor.shutdown(Unknown Source)
        at org.apache.derby.jdbc.InternalDriver.connect(Unknown Source)
        at org.apache.derby.jdbc.AutoloadedDriver.connect(Unknown Source)
        at java.sql.DriverManager.getConnection(DriverManager.java:399)
        at java.sql.DriverManager.getConnection(DriverManager.java:350)

Does anyone know why this is happening?

I am using Derby 10.8.2.3

Thanks,
Oskar Zinger

https://issues.apache.org/jira/browse/DERBY-5916 was backported to 10.8 with revision 1395186 and looks similar
I suggest you pick up 10.8.3 that has that fix.