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From "Knut Anders Hatlen (JIRA)" <j...@apache.org>
Subject [jira] Commented: (DERBY-2353) intermittent NPEs during DELETE ops in a reasonably large transaction
Date Wed, 21 Feb 2007 07:05:05 GMT

    [ https://issues.apache.org/jira/browse/DERBY-2353?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12474650
] 

Knut Anders Hatlen commented on DERBY-2353:
-------------------------------------------

Thanks for posting the complete stack trace! The NPE is thrown in some code that is only executed
when the derby.language.logQueryPlan property is true. You might be able to work around this
bug by disabling the logging of query plans.

> intermittent NPEs during DELETE ops in a reasonably large transaction
> ---------------------------------------------------------------------
>
>                 Key: DERBY-2353
>                 URL: https://issues.apache.org/jira/browse/DERBY-2353
>             Project: Derby
>          Issue Type: Bug
>          Components: Store
>    Affects Versions: 10.2.2.0
>         Environment: Seen on both Windows XP and Mac OS X 10.4
>            Reporter: Dan Karp
>
> I'm intermittently seeing NPEs thrown while using the embedded driver to rewrite several
rows in a single transaction.  Here's the set of commands that were executed on the transaction;
the last one is the one that failed:
> SELECT entry_id FROM zimbra.directory WHERE UPPER(zimbra_id) = '0F850D84-7096-4534-9389-9D85AFC17E8A'
AND entry_type = 'acct'
> DELETE FROM zimbra.directory_attrs WHERE entry_id = 8 AND UPPER(name) = 'ZIMBRACONTACTMAXNUMENTRIES'
> INSERT INTO zimbra.directory_attrs (entry_id, name, value) VALUES (8, 'zimbraContactMaxNumEntries',
'0')
> DELETE FROM zimbra.directory_attrs WHERE entry_id = 8 AND UPPER(name) = 'ZIMBRAPREFGALAUTOCOMPLETEENABLED'
> INSERT INTO zimbra.directory_attrs (entry_id, name, value) VALUES (8, 'zimbraPrefGalAutoCompleteEnabled',
'FALSE')
> DELETE FROM zimbra.directory_attrs WHERE entry_id = 8 AND UPPER(name) = 'ZIMBRAPREFMAILPOLLINGINTERVAL'
> INSERT INTO zimbra.directory_attrs (entry_id, name, value) VALUES (8, 'zimbraPrefMailPollingInterval',
'5m')
> DELETE FROM zimbra.directory_attrs WHERE entry_id = 8 AND UPPER(name) = 'ZIMBRAPREFGROUPMAILBY'
> INSERT INTO zimbra.directory_attrs (entry_id, name, value) VALUES (8, 'zimbraPrefGroupMailBy',
'conversation')
> DELETE FROM zimbra.directory_attrs WHERE entry_id = 8 AND UPPER(name) = 'ZIMBRAFEATUREVIEWINHTMLENABLED'
> INSERT INTO zimbra.directory_attrs (entry_id, name, value) VALUES (8, 'zimbraFeatureViewInHtmlEnabled',
'TRUE')
> DELETE FROM zimbra.directory_attrs WHERE entry_id = 8 AND UPPER(name) = 'ZIMBRAPREFMESSAGEVIEWHTMLPREFERRED'
> INSERT INTO zimbra.directory_attrs (entry_id, name, value) VALUES (8, 'zimbraPrefMessageViewHtmlPreferred',
'TRUE')
> DELETE FROM zimbra.directory_attrs WHERE entry_id = 8 AND UPPER(name) = 'ZIMBRAPREFREADINGPANEENABLED'
> INSERT INTO zimbra.directory_attrs (entry_id, name, value) VALUES (8, 'zimbraPrefReadingPaneEnabled',
'TRUE')
> DELETE FROM zimbra.directory_attrs WHERE entry_id = 8 AND UPPER(name) = 'ZIMBRAFEATUREGALAUTOCOMPLETEENABLED'
> INSERT INTO zimbra.directory_attrs (entry_id, name, value) VALUES (8, 'zimbraFeatureGalAutoCompleteEnabled',
'TRUE')
> DELETE FROM zimbra.directory_attrs WHERE entry_id = 8 AND UPPER(name) = 'ZIMBRAPREFCALENDARUSEQUICKADD'
> Here's the stack trace:
> Caused by: java.sql.SQLException: Java exception: ': java.lang.NullPointerException'.
> 	at org.apache.derby.impl.jdbc.SQLExceptionFactory.getSQLException(SQLExceptionFactory.java:45)
> 	at org.apache.derby.impl.jdbc.Util.newEmbedSQLException(Util.java:89)
> 	at org.apache.derby.impl.jdbc.Util.newEmbedSQLException(Util.java:100)
> 	at org.apache.derby.impl.jdbc.Util.javaException(Util.java:219)
> 	at org.apache.derby.impl.jdbc.TransactionResourceImpl.wrapInSQLException(TransactionResourceImpl.java:386)
> 	at org.apache.derby.impl.jdbc.TransactionResourceImpl.handleException(TransactionResourceImpl.java:345)
> 	at org.apache.derby.impl.jdbc.EmbedConnection.handleException(EmbedConnection.java:1378)
> 	at org.apache.derby.impl.jdbc.ConnectionChild.handleException(ConnectionChild.java:81)
> 	at org.apache.derby.impl.jdbc.EmbedStatement.executeStatement(EmbedStatement.java:1272)
> 	at org.apache.derby.impl.jdbc.EmbedPreparedStatement.executeStatement(EmbedPreparedStatement.java:1635)
> 	at org.apache.derby.impl.jdbc.EmbedPreparedStatement.executeUpdate(EmbedPreparedStatement.java:299)
> 	at org.apache.commons.dbcp.DelegatingPreparedStatement.executeUpdate(DelegatingPreparedStatement.java:233)
> 	at com.zimbra.cs.db.DebugPreparedStatement.executeUpdate(DebugPreparedStatement.java:154)
> And here's the schema:
> CREATE TABLE directory (
>    entry_id    INTEGER NOT NULL GENERATED BY DEFAULT AS IDENTITY PRIMARY KEY,
>    entry_type  CHAR(4) NOT NULL,
>    entry_name  VARCHAR(128) NOT NULL,
>    zimbra_id   CHAR(36),
>    modified    SMALLINT NOT NULL
> );
> CREATE UNIQUE INDEX i_directory_zimbra_id ON directory(zimbra_id);
> CREATE UNIQUE INDEX i_directory_entry_type_name ON directory(entry_type, entry_name);
> CREATE TABLE directory_attrs (
>    entry_id    INTEGER NOT NULL,
>    name        VARCHAR(255) NOT NULL,
>    value       VARCHAR(10240) NOT NULL,
>    CONSTRAINT fk_dattr_entry_id FOREIGN KEY (entry_id) REFERENCES directory(entry_id)
>       ON DELETE CASCADE
> );
> CREATE INDEX i_dattr_entry_id_name ON directory_attrs(entry_id, name);
> CREATE INDEX i_dattr_name ON directory_attrs(name);

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