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https://issues.apache.org/jira/browse/DERBY-5938?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13474537#comment-13474537
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Knut Anders Hatlen commented on DERBY-5938:
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We might get around the Java 8 (and higher) issue by stating that the value in
that column represents the JVM version targeted by the dynamically loaded
modules of the running Derby engine, which may be lower than the actual running
JVM version.
Or we could just say that it's an arbitrary identifier used internally, which
is what it is, and avoid the problem altogether. :) I'm not sure why we exposed
this information in the first place. The type of the JVM_ID column is
VARCHAR(32672), which is an odd choice for a column that holds an integer.
Maybe it was meant to expose JVMInfo.derbyVMLevel(), which returns a string?
> Documentation says Derby works with Java 1.4.2
> ----------------------------------------------
>
> Key: DERBY-5938
> URL: https://issues.apache.org/jira/browse/DERBY-5938
> Project: Derby
> Issue Type: Bug
> Components: Documentation
> Affects Versions: 10.10.0.0
> Reporter: Knut Anders Hatlen
> Assignee: Kim Haase
>
> The documentation says that Derby works with Java 1.4.2. This is not true on
> trunk, as support for Java 1.4.2 is removed for Derby 10.10. A quick search
> came up with these places that need change:
> * Getting started guide:
> http://db.apache.org/derby/docs/dev/getstart/tgssetupverify.html
> http://db.apache.org/derby/docs/dev/getstart/cgstutorialintro.html
> http://db.apache.org/derby/docs/dev/getstart/tgssetupjavaenvir.html
> http://db.apache.org/derby/docs/dev/getstart/cgsintsr.html
> Need to change the above topics to say that you need JDK 1.5 or later
> installed to run the examples.
> * Developer's guide:
> http://db.apache.org/derby/docs/dev/devguide/rdevconcepts713.html
> The cell for the combination Multi-User/Embedded mentions potential
> multi-boot problems in pre-1.4 JVMs. Derby doesn't run on pre-1.4 JVMs
> anymore (and hasn't done for a long time). However, the multi-boot problem is
> present on CDC/FP 1.1, which is still a supported platform, so maybe we
> should change "pre-1.4" to "J2ME" (or however we usually refer to that
> platform in the docs).
> * Admin guide:
> http://db.apache.org/derby/docs/dev/adminguide/cadminappsthenetworkserverandjvms.html
> Should say that the server is compatible with Java 5 and above.
> * Tools guide:
> http://db.apache.org/derby/docs/dev/tools/ctools1003034.html
> Although it's technically correct that the tools do run on Java 1.4, it's not
> possible to access a Derby database with them on Java 1.4 in any supported
> way (unsupported way: use derbytools.jar from 10.10 and derby.jar from 10.9).
> So we should change this topic to say Java 5 and above, perhaps also
> mentioning CDC/Foundation Profile 1.1.
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