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https://issues.apache.org/jira/browse/DERBY-2733?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12504440
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Myrna van Lunteren commented on DERBY-2733:
-------------------------------------------
IRC transcript between Kathey & me, ca 1.20 pm PDT
myrna> hi kathey?
<kmarsden> hi myrna
<myrna> I saw your reply re DERBY-2733...
<kmarsden> So why does startJBMS() get called, when all we are
doing is starting ij?
<myrna> I could be wrong, but it seems to me a number of defaults are
set up in startJBMS(), defaults that we'd want.
<myrna> Such as, we default to use EmbeddedSimpleDataSource.
<kmarsden> why does the bug not occur for other jvms?
<myrna> because they don't *require* a datasource; they are happy with
loading the default driver.
<myrna> With j2ME, there is no default driver, so it rolls on with no
info.
<kmarsden> do they return null from startJBMS() if ij.database is
not set?
<myrna> With other jvms it tries to make the connection, (using
drivermanager), and the connection comes out as null, and then yes, startJBMS
returns null.
<kmarsden> it wouldn't be null. it would throw an exception no?
<myrna> no
<myrna> there's no need to start ij with a database!
<myrna> I'm not at this point interested in fixing the entire logic of
ij...
<myrna> I just want this little bit to work, and a follow up bit that
prevents ij from attempting to load a driver if we have a datasource & we're
using j2me.
<myrna> (cause in that case ij never even starts).
<kmarsden> hmmm... Well I can't say I understand the fix. At least
the javadoc should be changed to say under what conditions startJBMS() returns
null.
<kmarsden> Maybe Dan could take another peek.
<kmarsden> Sorry I wasn't so helpful on review.
<myrna> :-) you need to do what you think is right.
<myrna> At the same time, I need to go do other stuff...and an overhaul
of ij is not on my list at this point.
<myrna> Even a full analysis of what situations startJBMS returns null
wasn't on my list of things... :-)
<myrna> thx kathey
<kmarsden> ok myrna.
> ij rolls through NullPointerException (NPE) with J2ME/JSR169/WEME 6.1.
> ----------------------------------------------------------------------
>
> Key: DERBY-2733
> URL: https://issues.apache.org/jira/browse/DERBY-2733
> Project: Derby
> Issue Type: Bug
> Components: Tools
> Affects Versions: 10.1.2.1, 10.2.2.0, 10.3.0.0
> Environment: windows xp; j9 -jcl:foun11 -version:
> java version "J2ME Foundation Specification v1.1"
> IBM J9 2.3 Windows XP x86-32 (JIT enabled)
> J9VM - 20061023_08962_lHdSMR
> JIT - 20060629_1804ifx1_r8
> GC - 200609_15
> JCL - 20061020_1321,foun11
> Licensed Materials - Property of IBM
> J9 - VM for the Java(TM) platform, Version 2.3
> (c) Copyright IBM Corp. 1991, 2006 All Rights Reserved
> Target: 20061023_08962_lHdSMR (Windows XP 5.1 build 2600 Service Pack 2 x86)
> JIT - 20060629_1804ifx1_r8
> Reporter: Myrna van Lunteren
> Assignee: Myrna van Lunteren
> Fix For: 10.3.0.0
>
> Attachments: DERBY-2733-doc.diff, DERBY-2733-src.diff,
> DERBY-2733.diff2, rtoolsijproprefdatasource.html
>
>
> When starting ij - with, or without any derby.properties, ij first shows this:
> -------------------------------------------------------
> java.lang.reflect.InvocationTargetException
> at
> java.lang.reflect.AccessibleObject.invokeL(AccessibleObject.java:215)
> at java.lang.reflect.Method.invoke(Method.java:272)
> at
> org.apache.derby.impl.tools.ij.util.getDataSourceConnection(util.java:426)
> at org.apache.derby.impl.tools.ij.util.startJBMS(util.java:516)
> at org.apache.derby.impl.tools.ij.util.startJBMS(util.java:585)
> at
> org.apache.derby.impl.tools.ij.ConnectionEnv.init(ConnectionEnv.java:64)
> at
> org.apache.derby.impl.tools.ij.utilMain.initFromEnvironment(utilMain.java:179)
> at org.apache.derby.impl.tools.ij.Main.<init>(Main.java:230)
> at org.apache.derby.impl.tools.ij.Main.getMain(Main.java:193)
> at org.apache.derby.impl.tools.ij.Main.mainCore(Main.java:178)
> at org.apache.derby.impl.tools.ij.Main.main(Main.java:73)
> at org.apache.derby.tools.ij.main(ij.java:67)
> Caused by: java.lang.NullPointerException
> at
> org.apache.derby.jdbc.InternalDriver.embeddedDriverAcceptsURL(InternalDriver.java:116)
> at
> org.apache.derby.jdbc.InternalDriver.acceptsURL(InternalDriver.java:107)
> at
> org.apache.derby.jdbc.InternalDriver.connect(InternalDriver.java:126)
> at
> org.apache.derby.jdbc.EmbeddedSimpleDataSource.getConnection(EmbeddedSimpleDataSource.java:406)
> at
> org.apache.derby.jdbc.EmbeddedSimpleDataSource.getConnection(EmbeddedSimpleDataSource.java:373)
> at
> java.lang.reflect.AccessibleObject.invokeL(AccessibleObject.java:213)
> ... 11 more
> ij version 10.3
> ij>
> After that, ij does appear to start normal operations.
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