[ http://issues.apache.org/jira/browse/DERBY-1872?page=all ]
John H. Embretsen updated DERBY-1872:
-------------------------------------
Derby Info: [Patch Available]
> Backport lang/wisconsin.java at 10.2.0.4-alpha to the 10.1 branch
> -----------------------------------------------------------------
>
> Key: DERBY-1872
> URL: http://issues.apache.org/jira/browse/DERBY-1872
> Project: Derby
> Issue Type: Test
> Components: Test
> Affects Versions: 10.1.3.1
> Environment: N/A
> Reporter: John H. Embretsen
> Assigned To: John H. Embretsen
> Priority: Minor
> Fix For: 10.1.3.2
>
> Attachments: port-wisconsin-from-10.2.0.4-to-10.1_v2.stat,
> port-wisconsin-from-10.2.0.4-to-10.1_v2.zip
>
>
> Investigations relating to DERBY-1564 ("wisconsin.java test failed in
> DerbyNet or DerbyNetClient frameworks, VM for network server got
> OutOfMemoryError") revealed that comparing memory usage for the
> lang/wisconsin.[java|sql] test in 10.1.x versus 10.2.x was like comparing
> apples and oranges. After the 10.1 branch was created, several updates were
> made to the wisconsin test in trunk that were not backported to 10.1, e.g:
> * giving the optimizer unlimited time to choose query plans
> * compressing the tables to avoid the instabilities reported in DERBY-937
> Backporting the test will make it less unfair to compare 10.1 vs. 10.2 (or
> trunk) test results and memory usage, and it will make it easier to determine
> if failures (such as DERBY-1564) are regressions or not. On the other hand,
> other differences between the branches that may influence the test will
> remain, so this will not be a wonder cure.
> The failures seen in DERBY-1564 were mainly caused by bugs (DERBY-1091,
> DERBY-1614) in the test harness, causing the wisconsin test for the 10.2.0.4
> snapshot to run with low memory settings. These issues have been fixed.
> The most practical backporting approach will probably be to take the
> wisconsin test as it was in the 10.2.0.4-snapshot (SVN revision 423199), and
> port it to the current 10.1 branch. Other changes have been made to the
> wisconsin test in trunk/10.2 after 10.2.0.4, but to avoid various
> dependencies (e.g. DERBY-1609), these should not be backported.
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