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https://issues.apache.org/jira/browse/DERBY-2931?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12512121
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Knut Anders Hatlen commented on DERBY-2931:
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I found that the bug can be reproduced with these three steps:
1. Create a database with 10.2:
ij version 10.2
ij> connect 'jdbc:derby:db;create=true';
ij> exit;
2. Connect to the same database with 10.3 in soft upgrade mode and create a
table, then exit ij:
ij version 10.3
ij> connect 'jdbc:derby:db';
ij> create table t (x int);
0 rows inserted/updated/deleted
ij> exit;
3. Connect with 10.3 again and try to fetch the contents of the table:
ij version 10.3
ij> connect 'jdbc:derby:db';
ij> select * from t;
ERROR XSDA7: Restore of a serializable or SQLData object of class , attempted
to read more data than was originally stored
ERROR XJ001: Java exception: ': java.io.EOFException'.
> jdbcapi/ConcurrencyTest not able to drop table in soft upgrade mode
> -------------------------------------------------------------------
>
> Key: DERBY-2931
> URL: https://issues.apache.org/jira/browse/DERBY-2931
> Project: Derby
> Issue Type: Bug
> Affects Versions: 10.3.1.1
> Environment: Soft upgrade
> Reporter: Øystein Grøvlen
>
> 1. Created at database system/wombat with ij version 10.2
> 2. Ran jdbcapi/ConcurrencyTest with same current directory. All test cases
> but the first test fail with:
> 30)
> testTruncateDuringScan(org.apache.derbyTesting.functionTests.tests.jdbcapi.ConcurrencyTest)junit.framework.ComparisonFailure:
> 'drop table t1' failed with unexpected SQL State expected:<[42Y55]> but
> was:<[XSDA7]>
> at
> org.apache.derbyTesting.functionTests.tests.jdbcapi.SURDataModelSetup.createDataModel(SURDataModelSetup.java:70)
> at
> org.apache.derbyTesting.functionTests.tests.jdbcapi.SURDataModelSetup.createDataModel(SURDataModelSetup.java:125)
> at
> org.apache.derbyTesting.functionTests.tests.jdbcapi.ConcurrencyTest.setUp(ConcurrencyTest.java:54)
> at
> org.apache.derbyTesting.junit.BaseTestCase.runBare(BaseTestCase.java:88)
> at junit.extensions.TestDecorator.basicRun(TestDecorator.java:24)
> at junit.extensions.TestSetup$1.protect(TestSetup.java:21)
> at junit.extensions.TestSetup.run(TestSetup.java:25)
> at
> org.apache.derbyTesting.junit.BaseTestSetup.run(BaseTestSetup.java:57)
> at junit.extensions.TestDecorator.basicRun(TestDecorator.java:24)
> at junit.extensions.TestSetup$1.protect(TestSetup.java:21)
> at junit.extensions.TestSetup.run(TestSetup.java:25)
> at junit.extensions.TestDecorator.basicRun(TestDecorator.java:24)
> at junit.extensions.TestSetup$1.protect(TestSetup.java:21)
> at junit.extensions.TestSetup.run(TestSetup.java:25)
> at
> org.apache.derbyTesting.junit.BaseTestSetup.run(BaseTestSetup.java:57)
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