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https://issues.apache.org/jira/browse/DERBY-6975?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16262005#comment-16262005
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David Sitsky commented on DERBY-6975:
-------------------------------------
Hi Rick.. do you have any advice given my responses? Thanks..
> ERROR 40XL1: A lock could not be obtained within the time requested
> --------------------------------------------------------------------
>
> Key: DERBY-6975
> URL: https://issues.apache.org/jira/browse/DERBY-6975
> Project: Derby
> Issue Type: Bug
> Components: SQL
> Affects Versions: 10.14.1.0
> Reporter: David Sitsky
>
> I have an application that when run on a certain dataset, every 5 runs I
> might see this error happening. The code is creating a lot of rows using a
> sequence generator.
> {noformat}
> Caused by: ERROR 40XL1: A lock could not be obtained within the time
> requested
> at
> org.apache.derby.iapi.error.StandardException.newException(StandardException.java)
>
> at
> org.apache.derby.iapi.error.StandardException.newException(StandardException.java)
>
> at
> org.apache.derby.impl.sql.catalog.SequenceUpdater.tooMuchContentionException(SequenceUpdater.java)
>
> at
> org.apache.derby.impl.sql.catalog.SequenceUpdater.getCurrentValueAndAdvance(SequenceUpdater.java)
>
> at
> org.apache.derby.impl.sql.catalog.DataDictionaryImpl.getCurrentValueAndAdvance(DataDictionaryImpl.java)
>
> at
> org.apache.derby.impl.sql.execute.BaseActivation.getCurrentValueAndAdvance(BaseActivation.java)
>
> at
> org.apache.derby.impl.sql.execute.InsertResultSet.getSetAutoincrementValue(InsertResultSet.java)
>
> at
> org.apache.derby.impl.sql.execute.BaseActivation.getSetAutoincrementValue(BaseActivation.java)
>
> at
> org.apache.derby.exe.ac560740aax015fx6bc1x68cax000002339e626a.e0(ac560740aax015fx6bc1x68cax000002339e626a.java)
>
> at
> org.apache.derby.impl.services.reflect.DirectCall.invoke(DirectCall.java)
> at
> org.apache.derby.impl.sql.execute.RowResultSet.getNextRowCore(RowResultSet.java)
>
> at
> org.apache.derby.impl.sql.execute.NormalizeResultSet.getNextRowCore(NormalizeResultSet.java)
>
> at
> org.apache.derby.impl.sql.execute.DMLWriteResultSet.getNextRowCore(DMLWriteResultSet.java)
>
> at
> org.apache.derby.impl.sql.execute.InsertResultSet.getNextRowCore(InsertResultSet.java)
>
> at
> org.apache.derby.impl.sql.execute.InsertResultSet.open(InsertResultSet.java)
> at
> org.apache.derby.impl.sql.GenericPreparedStatement.executeStmt(GenericPreparedStatement.java)
>
> at
> org.apache.derby.impl.sql.GenericPreparedStatement.execute(GenericPreparedStatement.java)
>
> ... 25 more
> {noformat}
> It is not clear to me why when looking at the code this should be happening.
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