Java.Lang.NullPoint.Exception in OWB Mapping

Hello Everybody
We are building Data Warehouse using OWB Repository 9.2.0.2.0. When we are validating or deploying the created map we are getting Java.Lang.NullPoint.Exception. This leads to blank screen. We are unable to recover the map. Sometimes, synchronization works to recover the map, but not all the times.
Is there any solution to it?

Mark
Is it possible to solve the problem without migrating? I have the details of error as follows --
java.lang.NullPointerException
java.lang.NullPointerException
     at oracle.wh.service.impl.mapping.metadata.WBMappingGraphImpl.<init>(WBMappingGraphImpl.java:43)
     at oracle.wh.service.impl.mapping.metadata.WBMappingGraphHelper.createMappingGraph(WBMappingGraphHelper.java:31)
     at oracle.wh.ui.mapping.MappingGraphNew.drawStage(MappingGraphNew.java:2660)
     at oracle.wh.ui.mapping.MappingGraphNew.setStage(MappingGraphNew.java:484)
     at oracle.wh.ui.mapping.MappingEditorCanvas.refresh(MappingEditorCanvas.java:287)
     at oracle.wh.ui.common.WhFolderEditor.refreshCanvas(WhFolderEditor.java:951)
     at oracle.wh.ui.common.WhFolderEditor.refresh(WhFolderEditor.java:604)
     at oracle.wh.ui.common.WhFolderEditor$1$MyRefresh.run(WhFolderEditor.java:424)
     at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:154)
     at java.awt.EventQueue.dispatchEvent(EventQueue.java:337)
     at java.awt.EventDispatchThread.pumpOneEventForHierarchy(EventDispatchThread.java:131)
     at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:98)
     at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:93)
     at java.awt.EventDispatchThread.run(EventDispatchThread.java:85)
I appreciate your feedback.
Cheers, Bana

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java.lang.ClassCastException: java.lang.Thread
at
weblogic.servlet.internal.ResponseHeaders.setDateHeader(ResponseHeaders.java
:273)
at
weblogic.servlet.internal.ServletResponseImpl.setDateHeader(ServletResponseI
mpl.java:449)
at
weblogic.servlet.internal.ServletResponseImpl.writeHeaders(ServletResponseIm
pl.java:637)
at
weblogic.servlet.internal.ServletOutputStreamImpl.flush(ServletOutputStreamI
mpl.java:124)
at
weblogic.servlet.internal.WLOutputStreamWriter.flush(WLOutputStreamWriter.ja
va:124)
at java.io.PrintWriter.flush(PrintWriter.java:120)
at
org.apache.xalan.serialize.SerializerToXML.flushWriter(SerializerToXML.java:
1431)
at
org.apache.xalan.serialize.SerializerToXML.endDocument(SerializerToXML.java:
629)
at
org.apache.xalan.transformer.ResultTreeHandler.endDocument(ResultTreeHandler
..java:180)
at
org.apache.xalan.transformer.TransformerImpl.transformNode(TransformerImpl.j
ava:1194)
at
org.apache.xalan.transformer.TransformerImpl.run(TransformerImpl.java:2894)
at java.lang.Thread.run(Thread.java:484)
What happened is: to support incremental output, Xalan-Java performs
the
transformation in a second thread while building the source tree inthe
main
thread. So Transformer.transform() creates a new thread to run the
transformer.run() method, which will write to weblogic's internal
ServletOutputStreamImpl, and in the end calls flush() on it.
ServletOutputStreamImpl determines that the headers haven't been written
yet, and the headers need to be written before any servlet output, so
it
calls ServletResponseImpl.writeHeaders(), which eventually calls
ResponseHeaders.setDateHeader(). The last method assumes the thread
is
weblogic's internal ExecuteThread and tries to cast the thread as such,
maybe to get the date from it. But the thread is a plain java.lang.Thread
created by xalan, thus we get the java.lang.ClassCastException:
java.lang.Thread
This suggests a second workaround: call ServletResponse.flushBuffer()
before any xalan stuff, which will force the headers to be written in
weblogic's ExecuteThread. The shortcoming of this is that this will
cause
the response to be commited, and if the xalan stuff throws exception
you can
not forward to another page.
Another thing is that xalan should not directly call flush() on
ServletOutputStreamImpl at all. I will report it to xalan and see if
they
consider that a bug. If they fix that then we have a third workaround:
set
the buffer size of ServletResponse big enough to accomodate everything
including the xslt outputs, so the ServletOutput does not need to be
flushed
during xalan code.
I do not consider this problem a weblogic bug, since the servlet container
has to right to expect any thread inside it to be its own. Serlvet2.2
spec
says:
1.2 What is a Servlet Container?
A Servlet Container may place security restrictions on the environment
that
a servlet executes in. In
a Java 2 Platform Standard Edition 1.2 (J2SE) or Java 2 Platform Enterprise
Edition 1.2 (J2EE)
environment, these restrictions should be placed using the permission
architecture defined by Java 2
Platform. For example, high end application servers may limit certain
action, such as the creation of
a Thread object, to insure that other components of the container are
not
negatively impacted.
Weblogic should explicitly warn the developers that creating threads
inside
the servlet container may have adverse effects, the same kind of problem
we
are having. (or maybe they already did somewhere in their documentation?)
On the xalan side, I would suggest them to either give the option to
switch
the two threads, or to give the option to buffer the output and write
it out
in the main thread, which is exactly what you did in your first workaround.
Any comments or thoughts on the subject are welcome.
-- Chuck Zhao
"MK Parini" <[email protected]> wrote in message
news:[email protected]...
I found, what I think to be a bug, and a work-around for it.
When doing an XSLT Transformation, you must specify a StreamResult
to which to write the output. I was doing my transformation in
a
servlet so I was writing my output to the HttpResponse
(The variable res is a javax.servlet.http.HttpServletResponse
object)
StreamResult htmlTarget = new StreamResult(res.getWriter());
If I use this, when I perform the transformation using the TRAX
APIs,
InputStream xslFile = context.getResourceAsStream(fileName);
TransformerFactory tFactory = TransformerFactory.newInstance();
Templates xslTemplates = tFactory.newTemplates(new StreamSource(xslFile));
transformer = xslTemplates.newTransformer();
transformer.transform(xmlSource, htmlTarget);
I receive the ClassCastException from the class
weblogic.servlet.internal.ResponseHeaders.setDateHeader(ResponseHeaders.java
:273),
as seen in my previous posting.
I discovered, if I write my output to a StringBuffer, and then
I write
the StringBuffer to the HttpResponse, I do not get the ClassCastException.
For example,
StringWriter myWriter = new StringWriter(2400);
StreamResult htmlTarget = new StreamResult(myWriter);
<Same transformation code as above>
myWriter.close();
PrintWriter out = res.getWriter();
out.print(myWriter.toString());
Is this a bug in the weblogic internal servlet class or am I just
missing something?
Also, one concern that I have with the workaround is that it might
hurt performance.
Any comments or thoughts on the subject are welcome.

Java.lang.indexoutofbound Exception

HI all
i am trying to convert multiple jpg images to single tiff image..i am getting an exception that is
"java.lang.indexoutofbound Exception"..can anyone help me
import com.sun.media.imageio.plugins.tiff.TIFFImageWriteParam;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.Locale;
import javax.imageio.IIOImage;
import javax.imageio.ImageIO;
import javax.imageio.ImageReader;
import javax.imageio.ImageWriteParam;
import javax.imageio.ImageWriter;
import javax.imageio.metadata.IIOMetadata;
import javax.imageio.stream.ImageInputStream;
import javax.imageio.stream.ImageOutputStream;
public class mergeImages
public void execute(ArrayList<File> imageFiles , File newTIFF)
throws IOException
Iterator iterator = imageFiles.iterator();
Iterator writers = ImageIO.getImageWritersByFormatName("tif");
ImageWriter writer = (ImageWriter)writers.next();
ImageOutputStream ios = ImageIO.createImageOutputStream(newTIFF);
writer.setOutput(ios);
TIFFImageWriteParam tiffWriteParam = new TIFFImageWriteParam(Locale.US);
tiffWriteParam.setCompressionMode(ImageWriteParam.MODE_EXPLICIT);
tiffWriteParam.setCompressionType("JPEG");
boolean firstImage = true;
while (iterator.hasNext())
File imageFile = (File) iterator.next();
ImageInputStream iis = ImageIO.createImageInputStream(imageFile);
Iterator readers = ImageIO.getImageReaders(iis);
ImageReader reader = (ImageReader)readers.next();
reader.setInput(iis);
try
for(int i = 0;i<imageFiles.size();i++)
IIOMetadata iioImageMetadata = reader.getImageMetadata(i);
int imageHeight = reader.getHeight(i);
int imageWidth = reader.getWidth(i);
tiffWriteParam.setTilingMode(ImageWriteParam.MODE_EXPLICIT);
tiffWriteParam.setTiling(imageWidth, imageHeight, 0, 0);
BufferedImage bi = reader.read(i, null);
IIOImage image = new IIOImage(bi, null, iioImageMetadata);
if(firstImage==false)
writer.writeInsert(-1,image, tiffWriteParam);
else {
writer.write(null, image, tiffWriteParam);
firstImage = false;
catch (Exception e)
System.out.println("Exxxxxxxxx"+e);
reader.dispose();
writer.dispose();
public static void main(String[] args)throws IOException
ArrayList filesList=new ArrayList();
File destFile = new File("c:\\TEST.tif");
//your logic to get the list of files.
// set the file list to 'filesList'
File in1 = new File("c:\\a.jpg");
File in2 = new File("c:\\b.jpg");
filesList.add(0,in1);
filesList.add(1,in2);
mergeImages mI=new mergeImages();
mI.execute(filesList,destFile);
}

To expand on that a little, so that you get better information next time:
This line tells you what, ultimately, failed.
java.lang.IndexOutOfBoundsExceptionYou then get the stack trace from most recent method called to least recent method called. The most recent method will contain the line of code that actually failed, but as here may be in an external library:
at com.sun.imageio.plugins.jpeg.JPEGImageReader.gotoImage(JPEGImageReader.java:448)The last external package after your own code will be the method call that failed. Here you were calling the getImageMetadata() method of the com.sun.imageio.plugins.jpeg.JPEGImageReader class. Documentation on this class is available from the [Sun API documentation|http://java.sun.com/j2se/1.5.0/docs/api/javax/imageio/ImageReader.html] .
at com.sun.imageio.plugins.jpeg.JPEGImageReader.getImageMetadata(JPEGImageReader.java:851)The next entry indicates which line of your own code failed. Here it was line 45 which is within a method called execute (mediocre name - it should describe what it's doing, execute is too abstract) of your own class called mergeImagesHCL (also a poor name - classes should always start with a capital letter):
at mergeImagesHCL.execute(mergeImagesHCL.java:45)The rest of the stack trace tells you how you got there - here by calling mergeImagesHCL at line 84 of the main method of the same class:
at mergeImagesHCL.main(mergeImagesHCL.java:84)Stack traces tell you exactly what line of code your error is on, what you were calling when it failed, and why it failed. Use them.

Weblogic 8.1 SP4 getting Java.lang.outofMemory exception

Dear experts,
We are running WL8.1 SP4 on our Solaris 5.9 Server.
We want to do MQ implementatin on this server and for the same some kernel parameters were changed.
now our system has below parameters in /etc/system:
set semsys:seminfo_semmsl=1000
set semsys:seminfo_semvmx=32767
set shmsys:shminfo_shmmax=4294967295
set shmsys:shminfo_shmmin=1
set shmsys:shminfo_shmseg=2048
set shmsys:shminfo_shmmni=2048
set semsys:seminfo_semmni=1024
set semsys:seminfo_semaem=16384
set semsys:seminfo_semmap=1026
set semsys:seminfo_semmns=16384
set semsys:seminfo_semopm=100
set semsys:seminfo_semmnu=16384
set semsys:seminfo_semume=256
set msgsys:msginfo_msgmni=50
set msgsys:msginfo_msgmap=1026
set msgsys:msginfo_msgmax=4096
set msgsys:msginfo_msgmnb=65535
set msgsys:msginfo_msgtql=4096
set msgsys:msginfo_msgssz=16
set msgsys:msginfo_msgseg=8192
set rlim_fd_cur=10000
set rlim_fd_max=10000
and below in /etc/profile:
ulimit -s unlimited
ulimit -d unlimited
but as soon as server was rebooted and we tried to start the weblogic we got java.lang.outofmemory exception.
details as below:
admin_trace:
java.lang.OutOfMemoryError
     at java.util.zip.ZipFile.open(Native Method)
     at java.util.zip.ZipFile.<init>(ZipFile.java:112)
     at java.util.zip.ZipFile.<init>(ZipFile.java:72)
     at weblogic.servlet.internal.WebAppHelper.makeImplicitMapFromJars(WebAppHelper.java:479)
     at weblogic.servlet.internal.WebAppServletContext.extractClassFiles(WebAppServletContext.java:5436)
     at weblogic.servlet.internal.WebAppServletContext.setDocroot(WebAppServletContext.java:5253)
     at weblogic.servlet.internal.WebAppServletContext.init(WebAppServletContext.java:545)
     at weblogic.servlet.internal.WebAppServletContext.<init>(WebAppServletContext.java:496)
     at weblogic.servlet.internal.HttpServer.loadWebApp(HttpServer.java:637)
     at weblogic.servlet.internal.WebAppModule.prepare(WebAppModule.java:619)
     at weblogic.j2ee.J2EEApplicationContainer.prepareWebModule(J2EEApplicationContainer.java:3191)
     at weblogic.j2ee.J2EEApplicationContainer.prepareModules(J2EEApplicationContainer.java:1581)
     at weblogic.j2ee.J2EEApplicationContainer.prepare(J2EEApplicationContainer.java:1227)
     at weblogic.j2ee.J2EEApplicationContainer.prepare(J2EEApplicationContainer.java:1070)
     at weblogic.management.deploy.slave.SlaveDeployer$ComponentActivateTask.prepareContainer(SlaveDeployer.java:2513)
     at weblogic.management.deploy.slave.SlaveDeployer$ActivateTask.createContainer(SlaveDeployer.java:2463)
     at weblogic.management.deploy.slave.SlaveDeployer$ActivateTask.prepare(SlaveDeployer.java:2379)
     at weblogic.management.deploy.slave.SlaveDeployer.processPrepareTask(SlaveDeployer.java:866)
     at weblogic.management.deploy.slave.SlaveDeployer.prepareDelta(SlaveDeployer.java:594)
     at weblogic.management.deploy.slave.SlaveDeployer.prepareUpdate(SlaveDeployer.java:508)
     at weblogic.drs.internal.SlaveCallbackHandler$1.execute(SlaveCallbackHandler.java:25)
     at weblogic.kernel.ExecuteThread.execute(ExecuteThread.java:219)
     at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:178)
--------------- nested within: ------------------
weblogic.management.ManagementException: [Deployer:149233]An unexpected error was encountered during the deployment process. - with nested exception:
[java.lang.OutOfMemoryError]
     at weblogic.management.deploy.slave.SlaveDeployer.convertThrowable(SlaveDeployer.java:1017)
     at weblogic.management.deploy.slave.SlaveDeployer.access$500(SlaveDeployer.java:124)
     at weblogic.management.deploy.slave.SlaveDeployer$ActivateTask.prepare(SlaveDeployer.java:2395)
     at weblogic.management.deploy.slave.SlaveDeployer.processPrepareTask(SlaveDeployer.java:866)
     at weblogic.management.deploy.slave.SlaveDeployer.prepareDelta(SlaveDeployer.java:594)
     at weblogic.management.deploy.slave.SlaveDeployer.prepareUpdate(SlaveDeployer.java:508)
     at weblogic.drs.internal.SlaveCallbackHandler$1.execute(SlaveCallbackHandler.java:25)
     at weblogic.kernel.ExecuteThread.execute(ExecuteThread.java:219)
     at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:178)
managed2_trace:
[java.lang.OutOfMemoryError].
java.lang.OutOfMemoryError
     at java.util.zip.ZipFile.open(Native Method)
     at java.util.zip.ZipFile.<init>(ZipFile.java:112)
     at java.util.zip.ZipFile.<init>(ZipFile.java:72)
     at weblogic.servlet.internal.WebAppHelper.makeImplicitMapFromJars(WebAppHelper.java:479)
     at weblogic.servlet.internal.WebAppServletContext.extractClassFiles(WebAppServletContext.java:5436)
     at weblogic.servlet.internal.WebAppServletContext.setDocroot(WebAppServletContext.java:5253)
     at weblogic.servlet.internal.WebAppServletContext.init(WebAppServletContext.java:545)
     at weblogic.servlet.internal.WebAppServletContext.<init>(WebAppServletContext.java:496)
     at weblogic.servlet.internal.HttpServer.loadWebApp(HttpServer.java:637)
     at weblogic.servlet.internal.WebAppModule.prepare(WebAppModule.java:619)
     at weblogic.j2ee.J2EEApplicationContainer.prepareWebModule(J2EEApplicationContainer.java:3191)
     at weblogic.j2ee.J2EEApplicationContainer.prepareModules(J2EEApplicationContainer.java:1581)
     at weblogic.j2ee.J2EEApplicationContainer.prepare(J2EEApplicationContainer.java:1227)
     at weblogic.j2ee.J2EEApplicationContainer.prepare(J2EEApplicationContainer.java:1070)
     at weblogic.j2ee.J2EEApplicationContainer.prepare(J2EEApplicationContainer.java:823)
     at weblogic.management.deploy.slave.SlaveDeployer$Application.prepare(SlaveDeployer.java:3029)
     at weblogic.management.deploy.slave.SlaveDeployer.prepareAllApplications(SlaveDeployer.java:967)
     at weblogic.management.deploy.slave.SlaveDeployer.resume(SlaveDeployer.java:349)
     at weblogic.management.deploy.DeploymentManagerServerLifeCycleImpl.resume(DeploymentManagerServerLifeCycleImpl.java:229)
     at weblogic.t3.srvr.SubsystemManager.resume(SubsystemManager.java:131)
     at weblogic.t3.srvr.T3Srvr.resume(T3Srvr.java:966)
     at weblogic.t3.srvr.T3Srvr.run(T3Srvr.java:361)
     at weblogic.Server.main(Server.java:32)
--------------- nested within: ------------------
weblogic.management.ManagementException: [Deployer:149233]An unexpected error was encountered during the deployment process. - with nested exception:
[java.lang.OutOfMemoryError]
     at weblogic.management.deploy.slave.SlaveDeployer.convertThrowable(SlaveDeployer.java:1017)
     at weblogic.management.deploy.slave.SlaveDeployer.access$500(SlaveDeployer.java:124)
     at weblogic.management.deploy.slave.SlaveDeployer$Application.prepare(SlaveDeployer.java:3034)
     at weblogic.management.deploy.slave.SlaveDeployer.prepareAllApplications(SlaveDeployer.java:967)
     at weblogic.management.deploy.slave.SlaveDeployer.resume(SlaveDeployer.java:349)
     at weblogic.management.deploy.DeploymentManagerServerLifeCycleImpl.resume(DeploymentManagerServerLifeCycleImpl.java:229)
     at weblogic.t3.srvr.SubsystemManager.resume(SubsystemManager.java:131)
     at weblogic.t3.srvr.T3Srvr.resume(T3Srvr.java:966)
     at weblogic.t3.srvr.T3Srvr.run(T3Srvr.java:361)
     at weblogic.Server.main(Server.java:32)
>
need help to identify what exactly went wrong and where.
Thanks

Hi,
As you are using WLS8.1 It means your JDK will be JDK1.4 and there is a Bug already available with JDK1.4 for the Same issue ... Please find the below link:
http://bugs.sun.com/bugdatabase/view_bug.do;:YfiG?bug_id=4705373 (For Sun JDK1.4)
AND
http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=6373059 (For Sun JDK 1.5.0_05)
Please try to switch to JRockit JDK.
Thanks
Jay SenSharma
http://weblogic-wonders.com/weblogic (WebLogic Wonders Are Here)

Java.Lang.NullPoint.Exception in OWB Mapping

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