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From Mike Matrigali <mikem_...@sbcglobal.net>
Subject Re: [jira] Commented: (DERBY-3362) ControlRow NPE
Date Wed, 05 Mar 2008 18:35:29 GMT
Yes, I believe they are the same issue.  On sane you get the ASSERT, on 
insane you get the null pointer.  I ran the test 50 times on a 4 
processor windows XP machine but no luck reproducing the ASSERT, also 
tried about 20 times on a laptop dual core XP but also no luck. I do
see DERBY-3493 in both environments intermittently.

Kathey Marsden (JIRA) wrote:
>     [ https://issues.apache.org/jira/browse/DERBY-3362?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12575439#action_12575439
] 
> 
> Kathey Marsden commented on DERBY-3362:
> ---------------------------------------
> 
> Is this likely to fix DERBY-3487 with a sane build. That I got 17 times out of 
> 50 repeated runs on my linux machine.  I can try with the patch there if you 
> think it is the same issue.
> 
> Kathey
> 
> 
> 
>> ControlRow NPE
>> --------------
>>
>>                 Key: DERBY-3362
>>                 URL: https://issues.apache.org/jira/browse/DERBY-3362
>>             Project: Derby
>>          Issue Type: Bug
>>    Affects Versions: 10.3.2.1
>>            Reporter: James Alan Shepherd
>>            Assignee: Mike Matrigali
>>         Attachments: b3362.diff, derbylog.zip
>>
>>
>> I have a NPE in Derby 10.3.2.1 (10.3.1.4 does not show this behaviour) that is probably
the same one discussed in DERBY-3216
>> FATAL 38406 [Main] (Start.java:153) - Start FAILED
>> org.springframework.transaction.TransactionSystemException: Could not commit JDBC
transaction; nested exception is java.sql.SQLException: Java exception: ': java.lang.NullPointerException'.
>> Caused by:
>> java.sql.SQLException: Java exception: ': java.lang.NullPointerException'.
>>         at org.apache.derby.impl.jdbc.SQLExceptionFactory40.getSQLException(Unknown
Source)
>>         at org.apache.derby.impl.jdbc.Util.newEmbedSQLException(Unknown Source)
>>         at org.apache.derby.impl.jdbc.Util.javaException(Unknown Source)
>>         at org.apache.derby.impl.jdbc.TransactionResourceImpl.wrapInSQLException(Unknown
Source)
>>         at org.apache.derby.impl.jdbc.TransactionResourceImpl.handleException(Unknown
Source)
>>         at org.apache.derby.impl.jdbc.EmbedConnection.handleException(Unknown Source)
>>         at org.apache.derby.impl.jdbc.EmbedConnection.commit(Unknown Source)
>>         at org.apache.commons.dbcp.DelegatingConnection.commit(DelegatingConnection.java:238)
>>         at org.apache.commons.dbcp.PoolingDataSource$PoolGuardConnectionWrapper.commit(PoolingDataSource.java:199)
>>         at org.springframework.jdbc.datasource.DataSourceTransactionManager.doCommit(DataSourceTransactionManager.java:245)
>>         at org.springframework.transaction.support.AbstractPlatformTransactionManager.processCommit(AbstractPlatformTransactionManager.java:651)
>>         at org.springframework.transaction.support.AbstractPlatformTransactionManager.commit(AbstractPlatformTransactionManager.java:621)
>>         at org.springframework.transaction.support.TransactionTemplate.execute(TransactionTemplate.java:146)
>>         at com.aaa.bbb.cccFactory$ddd.add(cccFactory.java:324)
>>         at com.aaa.eee.fff.ggg.reload(ggg.java:44)
>>         at com.aaa.eee.fff.ggg.startup(ggg.java:57)
>>         at com.aaa.eee.fff.Start.startupEee(Start.java:170)
>>         at com.aaa.eee.fff.Start.startup(Start.java:146)
>>         at com.aaa.start.Starter.startup(Starter.java:264)
>>         at com.aaa.start.Main.startup(Main.java:270)
>>         at com.aaa.start.Main.main(Main.java:199)
>> Caused by: java.sql.SQLException: Java exception: ': java.lang.NullPointerException'.
>>         at org.apache.derby.impl.jdbc.SQLExceptionFactory.getSQLException(Unknown
Source)
>>         at org.apache.derby.impl.jdbc.SQLExceptionFactory40.wrapArgsForTransportAcrossDRDA(Unknown
Source)
>>         ... 21 more
>> Caused by: java.lang.NullPointerException
>>         at org.apache.derby.impl.store.access.btree.ControlRow.getControlRowForPage(Unknown
Source)
>>         at org.apache.derby.impl.store.access.btree.ControlRow.get(Unknown Source)
>>         at org.apache.derby.impl.store.access.btree.ControlRow.get(Unknown Source)
>>         at org.apache.derby.impl.store.access.btree.BTreePostCommit.purgeRowLevelCommittedDeletes(Unknown
Source)
>>         at org.apache.derby.impl.store.access.btree.BTreePostCommit.performWork(Unknown
Source)
>>         at org.apache.derby.impl.store.raw.xact.Xact.postTermination(Unknown Source)
>>         at org.apache.derby.impl.store.raw.xact.Xact.completeCommit(Unknown Source)
>>         at org.apache.derby.impl.store.raw.xact.Xact.commit(Unknown Source)
>>         at org.apache.derby.impl.store.raw.xact.Xact.commit(Unknown Source)
>>         at org.apache.derby.impl.store.access.RAMTransaction.commit(Unknown Source)
>>         at org.apache.derby.impl.sql.conn.GenericLanguageConnectionContext.doCommit(Unknown
Source)
>>         at org.apache.derby.impl.sql.conn.GenericLanguageConnectionContext.userCommit(Unknown
Source)
>>         at org.apache.derby.impl.jdbc.TransactionResourceImpl.commit(Unknown Source)
>>         ... 15 more
>> and derby.log:
>> 2008-01-28 08:26:36.148 GMT Thread[Main,5,main] (XID = 1888), (SESSIONID = 2), (DATABASE
= directory:myDB), (DRDAID = null), Executing prepared statement: SELECT COUNT(*) FROM ZZZ
WHERE nID IS NULL :End prepared statement
>> 2008-01-28 08:26:36.150 GMT Thread[Main,5,main] (XID = 1888), (SESSIONID = 2), (DATABASE
= directory:myDB), (DRDAID = null), Committing
>> 2008-01-28 08:26:36.188 GMT Thread[Main,5,main] (XID = 1888), (SESSIONID = 2), (DATABASE
= directory:myDB), (DRDAID = null), Cleanup action starting
>> 2008-01-28 08:26:36.188 GMT Thread[Main,5,main] (XID = 1888), (SESSIONID = 2), (DATABASE
= directory:myDB), (DRDAID = null), Failed Statement is: null with 2 parameters begin parameter
#1: 1 :end parameter begin parameter #2: 1 :end param
>> eter
>> java.lang.NullPointerException
>>         at org.apache.derby.impl.store.access.btree.ControlRow.getControlRowForPage(Unknown
Source)
>>         at org.apache.derby.impl.store.access.btree.ControlRow.get(Unknown Source)
>>         at org.apache.derby.impl.store.access.btree.ControlRow.get(Unknown Source)
>>         at org.apache.derby.impl.store.access.btree.BTreePostCommit.purgeRowLevelCommittedDeletes(Unknown
Source)
>>         at org.apache.derby.impl.store.access.btree.BTreePostCommit.performWork(Unknown
Source)
>>         at org.apache.derby.impl.store.raw.xact.Xact.postTermination(Unknown Source)
>>         at org.apache.derby.impl.store.raw.xact.Xact.completeCommit(Unknown Source)
>>         at org.apache.derby.impl.store.raw.xact.Xact.commit(Unknown Source)
>>         at org.apache.derby.impl.store.raw.xact.Xact.commit(Unknown Source)
>>         at org.apache.derby.impl.store.access.RAMTransaction.commit(Unknown Source)
>>         at org.apache.derby.impl.sql.conn.GenericLanguageConnectionContext.doCommit(Unknown
Source)
>>         at org.apache.derby.impl.sql.conn.GenericLanguageConnectionContext.userCommit(Unknown
Source)
>>         at org.apache.derby.impl.jdbc.TransactionResourceImpl.commit(Unknown Source)
>>         at org.apache.derby.impl.jdbc.EmbedConnection.commit(Unknown Source)
>>         at org.apache.commons.dbcp.DelegatingConnection.commit(DelegatingConnection.java:238)
>>         at org.apache.commons.dbcp.PoolingDataSource$PoolGuardConnectionWrapper.commit(PoolingDataSource.java:199)
>>         at org.springframework.jdbc.datasource.DataSourceTransactionManager.doCommit(DataSourceTransactionManager.java:245)
>>         at org.springframework.transaction.support.AbstractPlatformTransactionManager.processCommit(AbstractPlatformTransactionManager.java:651)
>>         at org.springframework.transaction.support.AbstractPlatformTransactionManager.commit(AbstractPlatformTransactionManager.java:621)
>>         at org.springframework.transaction.support.TransactionTemplate.execute(TransactionTemplate.java:146)
>>         at com.aaa.bbb.cccFactory$ddd.add(cccFactory.java:324)
>>         at com.aaa.eee.fff.ggg.reload(ggg.java:44)
>>         at com.aaa.eee.fff.ggg.startup(ggg.java:57)
>>         at com.aaa.eee.fff.Start.startupEee(Start.java:170)
>>         at com.aaa.eee.fff.Start.startup(Start.java:146)
>>         at com.aaa.start.Starter.startup(Starter.java:264)
>>         at com.aaa.start.Main.startup(Main.java:270)
>>         at com.aaa.start.Main.main(Main.java:199)
>> Cleanup action completed
>> This is a long transaction that has suddenly started throwing a NPE.
>> Nothing strange happens during the transaction, but on closing I get
>> the NPE.
>> If I reorder some of the statements in the transaction (keeping
>> functional equivalence) the NPE is sometimes not thrown.
>> I have already moved any table/index create statements to a different (previously
committed) transaction. (I have had a few NPE before and locking issues that led me to this
practice).
>> For a while I thought that shutting down derby after creating tables solved the problem,
but this has been proven false.
>> I have tried to run with a sane version, but then I am blocked by too many DERBY-3360.
>> Also:
>> On occasion the transaction DOES commit. Or seems to, but then Derby becomes unresponsive,
the db files do not grow, but CPU rises and new connections can connect but get no response
to commands. I don't know if this is really connected or not, but I thought I would mention
it, as this unresponsive problem is what I am supposed to be diagnosing. When I say seems
to commit, I mean that sometimes commit returns, sometimes it doesn't. Not very helpful, I
know.
> 


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