[DERBY-6062] NullPointerException is possible during shutdown of Derby

• Type: Bug
• Status: Open
• Priority: Critical
• Resolution: Unresolved
• Affects Version/s: 10.8.2.2, 10.8.3.0
• Component/s: Store
• Labels: derby_triage10_11
• Urgency: Normal
• Bug behavior facts: Seen in production
• Assignee: Unassigned
• Reporter: Oskar Zinger
• Created: 01/Feb/13 02:07
• Updated: 19/Nov/16 16:55

Description

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.x

The issues comes from the following code in org.apache.derby.impl.store.raw.xact.XactFactory

add() method:

protected void add(Xact xact, boolean excludeMe)

{ ttab.add(xact, excludeMe); }

seems ttab is null

Here is the thread I started with some more information:
http://comments.gmane.org/gmane.comp.apache.db.derby.user/14788

Any help in resolution of this is greatly appreciated.

Thanks!
Oskar Zinger