Error when re-compiling a package

I get the following error when I re-compile my package.
Yesterday someone has compiled this package and changes are reflected.
How to get this package unlocked???.
ERROR at line 1:
ORA-04021: timeout occurred while waiting to lock object
SCH_LOAD.DNS_LOAD_BASE_TABLES_CRDM
ORA-04021: timeout occurred while waiting to lock object stringstringstringstringstring
Cause: While waiting to lock a library object, a timeout is occurred.
Action: Retry the operation later.

Thanks Rob,
Usually this package takes few minutes to re-compile and we have already crossed 2 to 3 hours.
Could you please let me know what might be the probable reasons for this abnormal behaviour.
we are able to find required changes using user_source view.
Could you please let me know on how to kill the process and unlock the package.
thanks in advance.

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Message was edited by:
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OK Justin,
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Connected.
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4     AND referenced_type <> 'SYNONYM'
5     AND owner <> 'SYS'
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PORTAL                         WWV_PARSE_AS_SPECIFIC_USER     PACKAGE BODY
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PORTAL                         WWV_SYS_DML                    PACKAGE BODY
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SQL>Let me know what you think.
Thanks again.

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meda karthik, Aug 7, 2004
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[javac] at com.sun.tools.javac.v8.tree.Tree$Select.accept(Tree.java(Compiled Code))
[javac] at com.sun.tools.javac.v8.comp.Attr.attribTree(Attr.java(Compiled Code))
[javac] at com.sun.tools.javac.v8.comp.Attr.attribExpr(Attr.java(Inlined Compiled Code))
[javac] at com.sun.tools.javac.v8.comp.Attr.visitApply(Attr.java(Compiled Code))
[javac] at com.sun.tools.javac.v8.tree.Tree$Apply.accept(Tree.java(Compiled Code))
[javac] at com.sun.tools.javac.v8.comp.Attr.attribTree(Attr.java(Compiled Code))
[javac] at com.sun.tools.javac.v8.comp.Attr.visitSelect(Attr.java(Compiled Code))
[javac] at com.sun.tools.javac.v8.tree.Tree$Select.accept(Tree.java(Compiled Code))
[javac] at com.sun.tools.javac.v8.comp.Attr.attribTree(Attr.java(Compiled Code))
[javac] at com.sun.tools.javac.v8.comp.Attr.attribExpr(Attr.java(Inlined Compiled Code))
[javac] at com.sun.tools.javac.v8.comp.Attr.visitApply(Attr.java(Compiled Code))
[javac] at com.sun.tools.javac.v8.tree.Tree$Apply.accept(Tree.java(Compiled Code))
[javac] at com.sun.tools.javac.v8.comp.Attr.attribTree(Attr.java(Compiled Code))
[javac] at com.sun.tools.javac.v8.comp.Attr.visitSelect(Attr.java(Compiled Code))
[javac] at com.sun.tools.javac.v8.tree.Tree$Select.accept(Tree.java(Compiled Code))
[javac] at com.sun.tools.javac.v8.comp.Attr.attribTree(Attr.java(Compiled Code))
[javac] at com.sun.tools.javac.v8.comp.Attr.attribExpr(Attr.java(Inlined Compiled Code))
[javac] at com.sun.tools.javac.v8.comp.Attr.visitApply(Attr.java(Compiled Code))
[javac] at com.sun.tools.javac.v8.tree.Tree$Apply.accept(Tree.java(Compiled Code))
[javac] at com.sun.tools.javac.v8.comp.Attr.attribTree(Attr.java(Compiled Code))
[javac] at com.sun.tools.javac.v8.comp.Attr.visitSelect(Attr.java(Compiled Code))
[javac] at com.sun.tools.javac.v8.tree.Tree$Select.accept(Tree.java(Compiled Code))
The above messages continue repeating and finally ends with...
[javac] at com.sun.tools.javac.v8.tree.Tree$MethodDef.accept(Tree.java(Compiled Code))
[javac] at com.sun.tools.javac.v8.comp.Attr.attribTree(Attr.java(Inlined Compiled Code))
[javac] at com.sun.tools.javac.v8.comp.Attr.attribStat(Attr.java(Inlined Compiled Code))
[javac] at com.sun.tools.javac.v8.comp.Attr.attribClassBody(Attr.java(Compiled Code))
[javac] at com.sun.tools.javac.v8.comp.Attr.attribClass(Attr.java(Compiled Code))
[javac] at com.sun.tools.javac.v8.comp.Attr.attribClass(Attr.java:1349)
[javac] at com.sun.tools.javac.v8.JavaCompiler.compile(JavaCompiler.java(Compiled Code))
[javac] at com.sun.tools.javac.v8.Main.compile(Main.java:586)
[javac] at com.sun.tools.javac.Main.compile(Main.java:67)
[javac] at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
[javac] at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:85)
[javac] at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:58)
[javac] at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:60)
[javac] at java.lang.reflect.Method.invoke(Method.java:391)
[javac] at org.apache.tools.ant.taskdefs.compilers.Javac13.execute(Javac13.java:100)
[javac] at org.apache.tools.ant.taskdefs.Javac.compile(Javac.java:842)
[javac] at org.apache.tools.ant.taskdefs.Javac.execute(Javac.java:682)
[javac] at org.apache.tools.ant.Task.perform(Task.java:341)
[javac] at org.apache.tools.ant.Target.execute(Target.java:309)
[javac] at org.apache.tools.ant.Target.performTasks(Target.java:336)
[javac] at org.apache.tools.ant.Project.executeTarget(Project.java:1339)
[javac] at org.apache.tools.ant.taskdefs.Ant.execute(Ant.java:397)
[javac] at org.apache.tools.ant.taskdefs.CallTarget.execute(CallTarget.java:143)
[javac] at org.apache.tools.ant.Task.perform(Task.java:341)
[javac] at org.apache.tools.ant.Target.execute(Target.java:309)
[javac] at org.apache.tools.ant.Target.performTasks(Target.java:336)
[javac] at org.apache.tools.ant.Project.executeTarget(Project.java:1339)
[javac] at org.apache.tools.ant.taskdefs.Ant.execute(Ant.java:397)
[javac] at org.apache.tools.ant.Task.perform(Task.java:341)
[javac] at org.apache.tools.ant.Target.execute(Target.java:309)
[javac] at org.apache.tools.ant.Target.performTasks(Target.java:336)
[javac] at org.apache.tools.ant.Project.executeTarget(Project.java:1339)
[javac] at org.apache.tools.ant.Project.executeTargets(Project.java:1255)
[javac] at org.apache.tools.ant.Main.runBuild(Main.java:609)
[javac] at org.apache.tools.ant.Main.start(Main.java:196)
[javac] at org.apache.tools.ant.Main.main(Main.java:235)
---------------------------ERROR----------------------------- I am also attaching the first few lines of the tag, incase you find some imports are being referenced circularly....here is the TagHandlerClass.........: ------------------CLASS-------------------------------------
package com.ibm.bcg.consoleUI.tags;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpSession;
import javax.servlet.jsp.JspException;
import javax.servlet.jsp.JspWriter;
import javax.servlet.jsp.tagext.TagSupport;
import org.apache.struts.util.MessageResources;
import com.ibm.bcg.consoleUI.forms.FormConstants;
import com.ibm.bcg.consoleUI.forms.SchedulerForm;
import com.ibm.bcg.consoleUI.forms.VCBaseForm;
import com.ibm.bcg.consoleUI.locale.LocaleUtils;
import com.ibm.bcg.shared.ClientInfo;
import com.ibm.bcg.shared.NameIdAssoc;
import com.ibm.bcg.shared.logging.Logger;
import com.ibm.bcg.shared.logging.LoggerFactory;
import java.util.*;
import com.ibm.bcg.consoleUI.action.ActionLists;
import com.ibm.bcg.consoleUI.action.alerts.AlertActionUtil;
import com.ibm.icu.util.Calendar;
import com.ibm.icu.text.NumberFormat;
* @author karthikd
* @version 1.0
public class ScheduleTag extends TagSupport {
// The following 3 fields denote the attributes of the tag.
private String formName;
private String requestKey;
private String scheduleController;
private SchedulerForm schedulerForm;
private Logger logger;
private MessageResources resources;
private ClientInfo clientInfo;
private Locale locale;
private HttpServletRequest request;
private JspWriter writer;
private HttpSession session;
private String newLine = "\r\n";
private Calendar cal = null;
public int doStartTag() throws JspException
try
logger = LoggerFactory.getLoggerInstance();
logger.log(this.getClass(),Logger.PRIORITY_DEBUG,"staring SchedulerTag ******");
request = (HttpServletRequest)pageContext.getRequest();
writer = (JspWriter)pageContext.getOut();
schedulerForm = (SchedulerForm) request.getAttribute(getRequestKey());
session = (HttpSession)pageContext.getSession();
clientInfo = (ClientInfo) session.getAttribute( "clientInfo" );
locale = clientInfo.getLocale();
resources = LocaleUtils.getMessageResources(VCBaseForm.CONSOLE_BUNDLE);
cal = Calendar.getInstance( clientInfo.getFormatLocale() );
// write out the various JavaScript functions required.
writer.println(getScripts());
//write out the main options,i.e Interval Based and Calendar based scheduling options
writer.println(getOptions());
//decide what kind of scheduling screen is needed.
if(schedulerForm.isIntervalBased())
logger.log(this.getClass(),Logger.PRIORITY_DEBUG,"Interval based scheduling ******* ");
writer.println(getIntervalScreen());
else
logger.log(this.getClass(),Logger.PRIORITY_DEBUG,"Calendarbased scheduling ******* ");
writer.println(getCalendarScreen());
writer.println(initCalendarScreen());
catch (Exception e)
logger.log(this.getClass(),Logger.PRIORITY_ERROR,"SchedulerTag Handler Exception ******** ");
logger.log(this.getClass(),Logger.PRIORITY_DEBUG,"Inside the catch block of Scheduler Tag ****** ");
throw new JspException("SchedulerTag : " + e.getMessage());
return SKIP_BODY;
------------------CLASS-------------------------------------
What could cause such a problem? Please help , in need of urgent help !!
regards, karthik .

Hi,
No i have not tried to compile it manually as the file is part of a larger project and there are a lot of other dependencies before i can compile this manually.
In any case i found a work around for the porblem. What was happening is that i had a fairly large function, which was about 250 lines, with a larger number of calls to the "append()" function of the StringBuffer class.
I broke the large function into smaller pieces and now i dont get the error.!
But can somebody explain why this solved the problem. Is it because the compiler is not able to stack up all the activation records for execution during runtime ? But like i mentioned what is it in IBM JDK 1.4.2 which is not allowing this, whereas IBM JDK 1.3.1 is able to do it ?
I did solve my problem, but havent got a logical answer to why this was happening !
would appreciate it if someone sheds some light on this topic .
thanks and regards,
Karthik

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