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From "Trejkaz (JIRA)" <j...@apache.org>
Subject [jira] Commented: (DERBY-3746) java.sql.SQLException: The exception 'java.lang.NullPointerException' was thrown while evaluating an expression.
Date Sat, 01 Nov 2008 13:11:44 GMT

    [ https://issues.apache.org/jira/browse/DERBY-3746?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12644509#action_12644509
] 

Trejkaz commented on DERBY-3746:
--------------------------------

I don't think this really comes down to network vs. non-network.  It should come down to a
"usable filesystem", and I haven't yet heard a good definition of what constitutes a "stable
filesystem".  On the mailing list, it was suggested that reliable sync() and locking were
the only requirements.  As far as I know CIFS and NFS can do both of these, which would suggest
that it's just as safe to use a network as a locally attached disk.

Networks can go down temporarily, sure, but so can "directly" attached disks (e.g. eSATA,
or hot-swappable drives.  What about USB and FireWire?)

So it seems to me this particular problem could very well occur if a directly attached disk
disappeared and then later reappeared.  It's not really an issue of corruption at all... or
so you'd hope, otherwise Derby wouldn't be resilient to a power outage either.


> java.sql.SQLException: The exception 'java.lang.NullPointerException' was thrown while
evaluating an expression.
> ----------------------------------------------------------------------------------------------------------------
>
>                 Key: DERBY-3746
>                 URL: https://issues.apache.org/jira/browse/DERBY-3746
>             Project: Derby
>          Issue Type: Bug
>          Components: Store
>    Affects Versions: 10.3.1.4
>         Environment: SUSE LINUX 10, Embedded Derby
>            Reporter: vibhuti gupta
>
> Hi
>  
> Following exception occurs while running our application with embedded derby database.
The application uses multithreading. This exception occurs while insert query is executed.
The insert query is run using JDBC:
>  
> insert into sign (sign, month, day, offset, digest) values (?,?,?,?,?). 
>  
> The table for which insert query is fired is:
>  
> create table sign(ID  INTEGER NOT NULL GENERATED ALWAYS AS IDENTITY PRIMARY KEY, sign
varchar(32), month char(6) not null, day char(2) not null, offset bigint not null, digest
varchar(32) for bit data not null)
>  
> There are multiple threads inserting data in database. I tried to search a lot on net
but could not find any solution. We're using derby 10.3.1.4. Not sure about the root cause.
It will be great if anybody provides some solution because it is creating lot of problems
in our application.
>  
> -------------------------------------------------------------------------------------------------------------
>  
> Caused by: java.sql.SQLException: The exception
> 'java.lang.NullPointerException' was thrown while evaluating an expression.
>         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.seeNextException(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.ConnectionChild.handleException(Unknown
> Source)
>         at org.apache.derby.impl.jdbc.EmbedStatement.executeStatement(Unknown
> Source)
>         at
> org.apache.derby.impl.jdbc.EmbedPreparedStatement.executeStatement(Unknown
> Source)
>         at
> org.apache.derby.impl.jdbc.EmbedPreparedStatement.executeUpdate(Unknown Source)
>         at
> org.apache.commons.dbcp.DelegatingPreparedStatement.executeUpdate(DelegatingPreparedStatement.java:101)
>         at
> org.apache.commons.dbcp.DelegatingPreparedStatement.executeUpdate(DelegatingPreparedStatement.java:101)
>         at src.app.database.derby.Derby.insertData(Derby.java:132)
>         ... 17 more
> Caused by: java.sql.SQLException: The exception
> 'java.lang.NullPointerException' was thrown while evaluating an expression.
>         at
> org.apache.derby.impl.jdbc.SQLExceptionFactory.getSQLException(Unknown Source)
>         at
> org.apache.derby.impl.jdbc.SQLExceptionFactory40.wrapArgsForTransportAcrossDRDA(Unknown
> Source)
>         ... 30 more
> 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)
>         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)
>         ... 27 more
> Caused by: java.lang.NullPointerException
>         at
> org.apache.derby.impl.store.raw.data.BaseDataFileFactory.openContainer(Unknown
> Source)
>         at
> org.apache.derby.impl.store.raw.data.BaseDataFileFactory.openContainer(Unknown
> Source)
>         at org.apache.derby.impl.store.raw.xact.Xact.openContainer(Unknown
> Source)
>         at
> org.apache.derby.impl.store.access.conglomerate.OpenConglomerate.init(Unknown
> Source)
>         at org.apache.derby.impl.store.access.heap.Heap.open(Unknown Source)
>         at
> org.apache.derby.impl.store.access.RAMTransaction.openConglomerate(Unknown
> Source)
>         at
> org.apache.derby.impl.store.access.RAMTransaction.openConglomerate(Unknown
> Source)
>         at
> org.apache.derby.impl.sql.catalog.DataDictionaryImpl.getSetAutoincrementValue(Unknown
> Source)
>         at
> org.apache.derby.impl.sql.execute.InsertResultSet.getSetAutoincrementValue(Unknown
> Source)
>         at
> org.apache.derby.impl.sql.execute.BaseActivation.getSetAutoincrementValue(Unknown
> Source)
>         at
> org.apache.derby.exe.acd89d8024x0119xf710x52e1x000002ea2ea00.e0(Unknown Source)
>         at org.apache.derby.impl.services.reflect.DirectCall.invoke(Unknown
> Source)
>         at
> org.apache.derby.impl.sql.execute.RowResultSet.getNextRowCore(Unknown Source)
>         at
> org.apache.derby.impl.sql.execute.NormalizeResultSet.getNextRowCore(Unknown
> Source)
>         at
> org.apache.derby.impl.sql.execute.DMLWriteResultSet.getNextRowCore(Unknown
> Source)
>         at org.apache.derby.impl.sql.execute.InsertResultSet.open(Unknown
> Source)
>         at org.apache.derby.impl.sql.GenericPreparedStatement.execute(Unknown
> Source)
>         ... 23 more
> ----------------------------------------------------------------------------------
>  
>  Also please find the output of sysinfo:
>  
> ------------------ Java Information ------------------
> Java Version:    1.6.0_01
> Java Vendor:     Sun Microsystems Inc.
> Java home:       C:\Java\jdk1.6.0_01\jre
> Java classpath:  .\config;.\lib\activation.jar;.\lib\aperture-1.0.1-beta.jar;
> .\lib\bcmail-jdk14-132.jar;.\lib\bcprov-jdk14-132.jar;.\lib\castor-0.9.3.21-xml.jar;
> .\lib\checkstyle-all-4.2.jar;.\lib\cjkanalyzer.jar;.\lib\commons-beanutils.jar;
> .\lib\commons-collections-3.0.jar;.\lib\commons-dbcp-1.2.1.jar;
> .\lib\commons-digester.jar;.\lib\commons-fileupload.jar;.\lib\commons-lang-2.0.jar;
> .\lib\commons-logging.jar;.\lib\commons-net-1.4.1.jar;.\lib\commons-pool-1.2.jar;
> .\lib\commons-validator.jar;.\lib\app.jar;.\lib\app_13.jar;.\lib\appsync.jar;
> .\lib\derby.jar;.\lib\derbyclient.jar;.\lib\derbynet.jar;.\lib\derbytools.jar;
> .\lib\displaytag-1.0-rc1.jar;.\lib\FontBox-0.1.0-dev.jar;
> .\lib\jakarta-regexp-1.2.jar;.\lib\javaee.jar;.\lib\jcharset.jar;
> .\lib\jcifs-1.2.17.jar;.\lib\jcommon-0.9.6.jar;.\lib\jfreechart-0.9.21.jar;
> .\lib\jtnef.jar;.\lib\junit.jar;.\lib\ldap.jar;.\lib\log4j-1.2.8.jar;
> .\lib\lucene-core-2.2.0.jar;.\lib\lucene-highlighter.jar;.\lib\mail.jar;
> .\lib\mysql-connector-java-3.0.9-stable-bin.jar;
> .\lib\openrdf-rdf2go-2.0.0-beta6.jar;.\lib\openrdf-sesame-2.0-beta6-onejar.jar;
> .\lib\org.semweb4j.rdf2go.api_4.4.7.jar;
> .\lib\org.semweb4j.rdf2go.impl.base_4.4.6.jar;.\lib\pd4ml.jar;
> .\lib\PDFBox-0.7.3.jar;.\lib\poi-3.0.1-FINAL-20070705.jar;.\lib\quartz-1.5.2.jar;
> .\lib\slf4j-api-1.3.0.jar;.\lib\slf4j-simple-1.3.0.jar;.\lib\SNMP4J.jar;
> .\lib\ss_css2.jar;.\lib\struts.jar;.\lib\textmining_v1.jar;
> .\lib\tm-extractors-0.4.jar;.\lib\truezip-6.jar;.\lib\xerces-2_6_2.jar;
> .\lib\windows\FPLibrary.jar
> OS name:         Windows XP
> OS architecture: x86
> OS version:      5.1
> Java user name:  vibhuti
> Java user home:  C:\Documents and Settings\vibhuti
> Java user dir:   D:\projects\src\app\dist\app
> java.specification.name: Java Platform API Specification
> java.specification.version: 1.6
> --------- Derby Information --------
> JRE - JDBC: Java SE 6 - JDBC 4.0
> [D:\projects\src\app\dist\app\lib\derby.jar] 10.3.1.4 - (561794)
> [D:\projects\src\app\dist\app\lib\derbytools.jar] 10.3.1.4 - (5617
> 94)
> [D:\projects\src\app\dist\app\lib\derbynet.jar] 10.3.1.4 - (561794
> )
> [D:\projects\src\app\dist\app\lib\derbyclient.jar] 10.3.1.4 - (561
> 794)
> ------------------------------------------------------
> ----------------- Locale Information -----------------
> ------------------------------------------------------

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