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https://issues.apache.org/jira/browse/DERBY-6797?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Myrna van Lunteren updated DERBY-6797:
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Attachment: Prepare4Upgrade.java
HardUpgradeAbort.java
AfterUpgrade.java
attaching a few classes that could be used to manually test this.
Would require to change DD_version in the new version to that it does fail
somewhere.
The programs are:
- Prepare4Upgrade: prepare (run with an older Derby version)
- HardUpgradeAbort: upgrade (with the modified newer version)
- AfterUpgrade: check (with the old version; if the failed upgrade would be
correctly rolled back you should not get a connection (version upgraded).).
Note that when using trunk you need to pass the property
derby.database.allowPreReleaseUpgrade=true to the program because trunk is
always at alpha.
> If a (machine/jvm) crash happens during hard upgrade, derby does not roll
> back the upgrade.
> -------------------------------------------------------------------------------------------
>
> Key: DERBY-6797
> URL: https://issues.apache.org/jira/browse/DERBY-6797
> Project: Derby
> Issue Type: Bug
> Components: Store
> Affects Versions: 10.11.1.3, 10.12.0.0
> Reporter: Myrna van Lunteren
> Attachments: AfterUpgrade.java, DERBY-6797.diff,
> HardUpgradeAbort.java, Prepare4Upgrade.java
>
>
> When a crash happens during hard upgrade of derby, the upgrade -up to that
> point - is not rolled back. Depending on where the crash happens this might
> leave a broken database behind.
> This makes it extra important to create a backup before doing a hard upgrade.
> I have not tested this with a soft upgrade.
> I will attach a test case which uses the upgrade test suite framework and
> uses a call of SanityManager.DEBUG_SET("upgrade_abort") to send a flag, and a
> change in impl/sql/catalog/DD_version to listen for this flag.
> Thus, it's only a test that would run in a sane environment.
> But this test does show that even if we see the error during hard upgrade,
> the resulting database appears to be in the newer version. I have manually
> tested this with 10.11 (by modifying DD_version in 10.11 to throw the error
> regardless of sanity manager or not) and with 10.12 by running my new test.
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