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From "Francois Orsini (JIRA)" <j...@apache.org>
Subject [jira] Commented: (DERBY-4364) Cannot create an instance of generated class org.apache.derby.exe.acf81e0010x0123x6e25x38c2x00000616b5f80.
Date Tue, 01 Sep 2009 02:29:32 GMT

    [ https://issues.apache.org/jira/browse/DERBY-4364?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12749735#action_12749735
] 

Francois Orsini commented on DERBY-4364:
----------------------------------------

You can store application logic (e.g. JAR files) in a Derby database and then set derby.database.classpath
(database property) to let Derby's class loader know that classes that could not be loaded
from the user's classpath, can be loaded from specific stored JARs in the database.

Note that the application logic would have to be part of a SQL Function, procedure or table
function...

More information at:
http://db.apache.org/derby/docs/dev/devguide/devguide-single.html#cdevdeploy30736

> Cannot create an instance of generated class org.apache.derby.exe.acf81e0010x0123x6e25x38c2x00000616b5f80.
> ----------------------------------------------------------------------------------------------------------
>
>                 Key: DERBY-4364
>                 URL: https://issues.apache.org/jira/browse/DERBY-4364
>             Project: Derby
>          Issue Type: Bug
>          Components: JDBC
>    Affects Versions: 10.5.3.0
>         Environment: The program run well in my local machine's tomcat server. but when
I deployed into http://www.jhost.cn/, it failed. the env in jhost are:
> Apache/2.2.11 mod_jk/1.2.25  
> Tomcat Version 5.5.27  
> JVM Version 1.5.0_11-b03  
> PHP Version 5.2.8  
> MySQL Ver 14.12 Distrib 5.0.67  
> phpMyAdmin Version information: 3.1.1 
>            Reporter: LiuZhenKe
>            Priority: Critical
>   Original Estimate: 336h
>  Remaining Estimate: 336h
>
> This issue is quite like issue DERBY-4142, but I think the root cause is different.
> The java code which raise this error is:
> rs=stmt.executeQuery("SELECT ID FROM T_SYS_RS_PACKAGE_MASTER WHERE EXISTS (SELECT * FROM
T_VC_MASTER MA WHERE MA.SUBCLASS_TABLE_NAME='T_SYS_RS_PACKAGE_MASTER' AND MA.SUBCLASS_TABLE_ID=T_SYS_RS_PACKAGE_MASTER.ID
AND MA.NAME='"+PackageName+"')");
> The error message tells that create an instance of generated class acf81e0010x0123x6e25x38c2x00000616b5f80
fail caused by java.lang.NoClassDefFoundError: org/apache/derby/impl/sql/execute/GenericQualifier.
But I see that this GenericQualifier.class is put in derby.jar, which is put  in WEB-INF\lib
folder. so I guess this issue may be caused by the classloader switch somewhere, may be in
acf81e0010x0123x6e25x38c2x00000616b5f80. the new classloader may not able to find a class
in WEB-INF\lib\derby.jar. Anyway, just a guess
> error log is captured:
> java.sql.SQLException: Cannot create an instance of generated class org.apache.derby.exe.acf81e0010x0123x6e25x38c2x00000616b5f80.
> 	at org.apache.derby.impl.jdbc.SQLExceptionFactory.getSQLException(SQLExceptionFactory.java:45)
> 	at org.apache.derby.impl.jdbc.Util.newEmbedSQLException(Util.java:87)
> 	at org.apache.derby.impl.jdbc.Util.seeNextException(Util.java:223)
> 	at org.apache.derby.impl.jdbc.TransactionResourceImpl.wrapInSQLException(TransactionResourceImpl.java:398)
> 	at org.apache.derby.impl.jdbc.TransactionResourceImpl.handleException(TransactionResourceImpl.java:346)
> 	at org.apache.derby.impl.jdbc.EmbedConnection.handleException(EmbedConnection.java:2201)
> 	at org.apache.derby.impl.jdbc.ConnectionChild.handleException(ConnectionChild.java:81)
> 	at org.apache.derby.impl.jdbc.EmbedStatement.execute(EmbedStatement.java:614)
> 	at org.apache.derby.impl.jdbc.EmbedStatement.executeQuery(EmbedStatement.java:152)
> 	at Concept.Resource.Server.derby.CCheckInResources.checkInResources(CCheckInResources.java:342)
> 	at Concept.Resource.Server.derby.CCheckInResources.SubmitTransaction(CCheckInResources.java:223)
> 	at Concept.Transaction.Server.CTransactionServer.doPost(CTransactionServer.java:722)
> 	at javax.servlet.http.HttpServlet.service(HttpServlet.java:637)
> 	at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
> 	at sun.reflect.GeneratedMethodAccessor231.invoke(Unknown Source)
> 	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
> 	at java.lang.reflect.Method.invoke(Method.java:585)
> 	at org.apache.catalina.security.SecurityUtil$1.run(SecurityUtil.java:269)
> 	at java.security.AccessController.doPrivileged(Native Method)
> 	at javax.security.auth.Subject.doAsPrivileged(Subject.java:517)
> 	at org.apache.catalina.security.SecurityUtil.execute(SecurityUtil.java:301)
> 	at org.apache.catalina.security.SecurityUtil.doAsPrivilege(SecurityUtil.java:162)
> 	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:283)
> 	at org.apache.catalina.core.ApplicationFilterChain.access$000(ApplicationFilterChain.java:56)
> 	at org.apache.catalina.core.ApplicationFilterChain$1.run(ApplicationFilterChain.java:189)
> 	at java.security.AccessController.doPrivileged(Native Method)
> 	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:185)
> 	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
> 	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
> 	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128)
> 	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
> 	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
> 	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:293)
> 	at org.apache.jk.server.JkCoyoteHandler.invoke(JkCoyoteHandler.java:190)
> 	at org.apache.jk.common.HandlerRequest.invoke(HandlerRequest.java:291)
> 	at org.apache.jk.common.ChannelSocket.invoke(ChannelSocket.java:769)
> 	at org.apache.jk.common.ChannelSocket.processConnection(ChannelSocket.java:698)
> 	at org.apache.jk.common.ChannelSocket$SocketConnection.runIt(ChannelSocket.java:891)
> 	at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:690)
> 	at java.lang.Thread.run(Thread.java:595)
> Caused by: java.sql.SQLException: Java exception: 'org/apache/derby/impl/sql/execute/GenericQualifier:
java.lang.NoClassDefFoundError'.
> 	at org.apache.derby.impl.jdbc.SQLExceptionFactory.getSQLException(SQLExceptionFactory.java:45)
> 	at org.apache.derby.impl.jdbc.Util.newEmbedSQLException(Util.java:87)
> 	at org.apache.derby.impl.jdbc.Util.javaException(Util.java:244)
> 	at org.apache.derby.impl.jdbc.TransactionResourceImpl.wrapInSQLException(TransactionResourceImpl.java:403)
> 	... 37 more
> Caused by: java.lang.NoClassDefFoundError: org/apache/derby/impl/sql/execute/GenericQualifier
> 	at org.apache.derby.impl.sql.execute.GenericExecutionFactory.getQualifier(GenericExecutionFactory.java:250)
> 	at org.apache.derby.exe.acf81e0010x0123x6e25x38c2x00000616b5f80.postConstructor(Unknown
Source)
> 	at org.apache.derby.impl.services.reflect.LoadedGeneratedClass.newInstance(LoadedGeneratedClass.java:71)
> 	at org.apache.derby.impl.services.reflect.ReflectGeneratedClass.newInstance(ReflectGeneratedClass.java:60)
> 	at org.apache.derby.impl.sql.GenericActivationHolder.<init>(GenericActivationHolder.java:129)
> 	at org.apache.derby.impl.sql.GenericPreparedStatement.getActivation(GenericPreparedStatement.java:234)
> 	at org.apache.derby.impl.jdbc.EmbedStatement.execute(EmbedStatement.java:609)
> 	... 32 more

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