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From "Dag H. Wanvik (JIRA)" <j...@apache.org>
Subject [jira] [Created] (DERBY-5153) Intermittent ASSERT FAILED Internal Error-- statistics not found in selectivityForConglomerate when running InterruptResilienceTest
Date Fri, 25 Mar 2011 15:25:06 GMT
Intermittent ASSERT FAILED Internal Error-- statistics not found in selectivityForConglomerate
when running InterruptResilienceTest
-----------------------------------------------------------------------------------------------------------------------------------

                 Key: DERBY-5153
                 URL: https://issues.apache.org/jira/browse/DERBY-5153
             Project: Derby
          Issue Type: Bug
    Affects Versions: 10.8.0.0
            Reporter: Dag H. Wanvik


Cf the enclosed derby.log:

While executing this statement: "select * from mtTab where i=?", we see this stacktrace:

org.apache.derby.shared.common.sanity.AssertFailure: ASSERT FAILED Internal Error-- statistics
not found in selectivityForConglomerate.
 cd = ConglomerateDescriptor: conglomerateNumber = 1249 name = SQL110325154339720 uuid = f04340b7-012e-ed78-50c3-00005e21fe7a
indexable = true
numKeys = 1
	at org.apache.derby.shared.common.sanity.SanityManager.THROWASSERT(SanityManager.java:162)
	at org.apache.derby.shared.common.sanity.SanityManager.THROWASSERT(SanityManager.java:147)
	at org.apache.derby.iapi.sql.dictionary.TableDescriptor.selectivityForConglomerate(TableDescriptor.java:1443)
	at org.apache.derby.impl.sql.compile.PredicateList.selectivity(PredicateList.java:3903)
	at org.apache.derby.impl.sql.compile.FromBaseTable.estimateCost(FromBaseTable.java:1295)
	at org.apache.derby.impl.sql.compile.OptimizerImpl.estimateTotalCost(OptimizerImpl.java:2626)
	at org.apache.derby.impl.sql.compile.OptimizerImpl.costBasedCostOptimizable(OptimizerImpl.java:2172)
	at org.apache.derby.impl.sql.compile.OptimizerImpl.costOptimizable(OptimizerImpl.java:1985)
	at org.apache.derby.impl.sql.compile.FromBaseTable.optimizeIt(FromBaseTable.java:526)
	at org.apache.derby.impl.sql.compile.ProjectRestrictNode.optimizeIt(ProjectRestrictNode.java:316)
	at org.apache.derby.impl.sql.compile.OptimizerImpl.costPermutation(OptimizerImpl.java:1939)
	at org.apache.derby.impl.sql.compile.SelectNode.optimize(SelectNode.java:1916)
	at org.apache.derby.impl.sql.compile.DMLStatementNode.optimizeStatement(DMLStatementNode.java:315)
	at org.apache.derby.impl.sql.compile.CursorNode.optimizeStatement(CursorNode.java:587)
	at org.apache.derby.impl.sql.GenericStatement.prepMinion(GenericStatement.java:384)
	at org.apache.derby.impl.sql.GenericStatement.prepare(GenericStatement.java:85)
	at org.apache.derby.impl.sql.GenericPreparedStatement.rePrepare(GenericPreparedStatement.java:229)
	at org.apache.derby.impl.sql.GenericPreparedStatement.executeStmt(GenericPreparedStatement.java:409)
	at org.apache.derby.impl.sql.GenericPreparedStatement.execute(GenericPreparedStatement.java:317)
	at org.apache.derby.impl.jdbc.EmbedStatement.executeStatement(EmbedStatement.java:1242)
	at org.apache.derby.impl.jdbc.EmbedPreparedStatement.executeStatement(EmbedPreparedStatement.java:1686)
	at org.apache.derby.impl.jdbc.EmbedPreparedStatement.executeQuery(EmbedPreparedStatement.java:284)
	at org.apache.derbyTesting.functionTests.tests.store.InterruptResilienceTest$WorkerThread.run(InterruptResilienceTest.java:414)

I saw this twice with the enclosed patch to InterruptResilienceTest (adds a test case in preparation
for DERBY-5152) - but the error occurs before we execute that fixture, so I think the patch
is irrelevant (a third and fourth execution failed to show the issue). I am posting it here
in case somebody can guess what could be wrong, I'll run more experiments to see if I can
reproduce it. Could it be related to our new index statistics daemon?

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