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https://issues.apache.org/jira/browse/DERBY-646?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12681257#action_12681257
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Knut Anders Hatlen commented on DERBY-646:
------------------------------------------
I came across one issue when I experimented with the in-memory backend. When I
exit from ij, I see this exception:
Exception in thread "main" java.lang.NullPointerException
at
org.apache.derby.impl.store.raw.data.BaseDataFileFactory.run(BaseDataFileFactory.java:2684)
at java.security.AccessController.doPrivileged(Native Method)
at
org.apache.derby.impl.store.raw.data.BaseDataFileFactory.removeStubs(BaseDataFileFactory.java:1591)
at
org.apache.derby.impl.store.raw.data.BaseDataFileFactory.stop(BaseDataFileFactory.java:499)
at
org.apache.derby.impl.services.monitor.TopService.stop(TopService.java:405)
at
org.apache.derby.impl.services.monitor.TopService.shutdown(TopService.java:349)
at
org.apache.derby.impl.services.monitor.BaseMonitor.shutdown(BaseMonitor.java:239)
at
org.apache.derby.impl.services.monitor.BaseMonitor.shutdown(BaseMonitor.java:205)
at org.apache.derby.jdbc.InternalDriver.connect(InternalDriver.java:231)
at
org.apache.derby.jdbc.AutoloadedDriver.connect(AutoloadedDriver.java:119)
at java.sql.DriverManager.getConnection(DriverManager.java:582)
at java.sql.DriverManager.getConnection(DriverManager.java:207)
at org.apache.derby.impl.tools.ij.utilMain.cleanupGo(utilMain.java:413)
at org.apache.derby.impl.tools.ij.utilMain.go(utilMain.java:246)
at org.apache.derby.impl.tools.ij.Main.go(Main.java:210)
at org.apache.derby.impl.tools.ij.Main.mainCore(Main.java:177)
at org.apache.derby.impl.tools.ij.Main.main(Main.java:73)
at org.apache.derby.tools.ij.main(ij.java:59)
To reproduce, execute the following commands in ij:
connect 'jdbc:derby:in-memory:mydb;create=true';
exit;
Other than that, it seems to be working fine.
> In-memory backend storage support
> ---------------------------------
>
> Key: DERBY-646
> URL: https://issues.apache.org/jira/browse/DERBY-646
> Project: Derby
> Issue Type: New Feature
> Components: Store
> Affects Versions: 10.5.0.0
> Environment: All
> Reporter: Stephen Fitch
> Assignee: Kristian Waagan
> Fix For: 10.5.0.0
>
> Attachments: derby-646-1a-raw-compiles.diff,
> derby-646-1a-raw-compiles.stat, derby-646-20090222.diff,
> derby-646-20090222.stat, derby-646-2a-vfmem_first_rev.diff,
> derby-646-2a-vfmem_first_rev.stat, derby-646-2b-vfmem_first_rev.diff,
> derby-646-3a-jmx_experiment.diff, derby-646-performance_comparison_1a.txt,
> svn.diff
>
>
> To allow creation and modification of databases in-memory without requiring
> disk access or space to store the database.
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