Recent changes to bugs

NullPointerException in InstancePeer.getPeer()

Dimitry D\'hondt — Wed, 21 Sep 2005 09:43:43 -0000

Our application has been running on Echo in a
production environment for some months now. About 1 to
5 times per week we get 1 exception on a web request
where the InstancePeer is not able to look up the
component peer.

Most likely this is a very rare bug because it appears
on random components and very infrequent as stated above.
Our application has about 100.000 web requests per day.
So the error seems to appear every 1 in +- 500.000 web
requests. (Rough numbers)

The exception thrown is this :

java.lang.NullPointerException
at
nextapp.echoservlet.InstancePeer.getPeer(InstancePeer.java:621)
at
nextapp.echoservlet.ComponentPeer.getPeer(ComponentPeer.java:271)
at
echopoint.ui.util.EchoPointComponentPeer.getPeer(EchoPointComponentPeer.java:102)
at
echopoint.ui.DialogPanelUI.render(DialogPanelUI.java:265)
at
nextapp.echoservlet.ui.GridCellUI.render(GridCellUI.java:114)
at nextapp.echoservlet.ui.GridUI.render(GridUI.java:273)
at
nextapp.echoservlet.ui.GridCellUI.render(GridCellUI.java:114)
at nextapp.echoservlet.ui.GridUI.render(GridUI.java:273)
at
nextapp.echoservlet.ContentPaneUI.service(ContentPaneUI.java:275)
at
nextapp.echoservlet.Connection.process(Connection.java:459)
at
nextapp.echoservlet.Hack.processConnection(Hack.java:27)
at com.dhl.hydrogen.echo.Server.process(Server.java:149)
at
nextapp.echoservlet.EchoServer.doGet(EchoServer.java:224)
at
javax.servlet.http.HttpServlet.service(HttpServlet.java:740)
at
javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:247)
at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:193)
at
com.dhl.hydrogen.servletfilter.GZipFilter.doFilter(GZipFilter.java:45)
at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:213)
at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:193)
at
com.dhl.hydrogen.servletfilter.ContextFilter.doFilter(ContextFilter.java:79)
at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:213)
at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:193)
at
org.securityfilter.filter.SecurityFilter.doFilter(SecurityFilter.java:182)
at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:213)
at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:193)
at
org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:256)
at
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
at
org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
at
org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
at
org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
at
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
at
org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
at
org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
at
org.apache.catalina.core.StandardContext.invoke(StandardContext.java:2422)
at
org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:180)
at
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
at
org.apache.catalina.valves.ErrorDispatcherValve.invoke(ErrorDispatcherValve.java:171)
at
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:641)
at
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:163)
at
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:641)
at
org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:577)
at
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:641)
at
org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
at
org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
at
org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:174)
at
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
at
org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
at
org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
at
org.apache.ajp.tomcat4.Ajp13Processor.process(Ajp13Processor.java:457)
at
org.apache.ajp.tomcat4.Ajp13Processor.run(Ajp13Processor.java:576)
at java.lang.Thread.run(Thread.java:534)

IFram src is blank on menus causing ssl to report unsecure

Anonymous — Mon, 20 Jun 2005 16:56:16 -0000

Echo is generating IFrame tags which have no 'src'
attribute defined for menus.

This causes Internet Explorer to report 'This page
contains both secure and unsecure items' when using
SSL.

The client will get an error for every menu shown.
For example, if you have 7 top level menus added to a
MenuBar, the client will get 7 error popus...very
annoying.

Here is a link discussing the issue and resolution.
Any help for a workaround would be appreciated.

http://gemal.dk/blog/2005/01/27/iframe_without_src_attri
bute_on_https_in_internet_explorer/

Thanks.

SelectableTable selectedRow

shookie10 — Fri, 25 Feb 2005 14:39:51 -0000

Using the SelectableTable which is also a sortable
table. I sort the first column and then select a row. I
get the correct row. I sort the first column again and
then select a row. I get the correct row. I sort on
another column(2nd, 3rd or 4th column) and then select
a row. I get the wrong value for:

public void actionPerformed(ActionEvent e) {
int selRow = table.getSelectedIndex();
int
mdlRow=sortableTableModel.getModelRowIndex
(selRow);
Integer orderNum = (Integer)table.getModel().getValueAt
(0, mdlRow);
}

The above code is used for selecting a row from the
SelectableTable.

ListBox getSelectedValue: Model Size Checking

Nicolas Carranza — Fri, 04 Feb 2005 18:45:13 -0000

Hello!
I need ListBox.getSelectedValue() do a model size
checking prior doing the
model.get(getMinSelectedIndex()) to avoid
---
java.lang.IndexOutOfBoundsException: Index: 0, Size: 0
13:24:21,795 INFO [STDOUT] at
java.util.ArrayList.RangeCheck(ArrayList.java:507)
13:24:21,795 INFO [STDOUT] at
java.util.ArrayList.get(ArrayList.java:324)
13:24:21,795 INFO [STDOUT] at
nextapp.echo.DefaultListModel.get(DefaultListModel.java:96)
13:24:21,795 INFO [STDOUT] at
nextapp.echo.ListBox.getSelectedValue(ListBox.java:247)
---

It would be nice something like:
vvv
value=selectedIndex<model.size()?
model.get(selectedIndex) : null;
^^^
instead of:
vvv
value = model.get(getMinSelectedIndex());
^^^
on ListBox.getSelectedValue().

Thanks!

nextapp.echo.Font missing a method

Web Hiker — Thu, 21 Oct 2004 11:18:22 -0000

The class nextapp.echo.Font is missing the following
methods :

public void setStyle(int style);
public int getStyle();

This style property is passed in both of the
constructors, but then there is no way to reference
this value aferwards.

AbstractImageReference.update() not lazy-aware

Anonymous — Fri, 08 Oct 2004 16:24:22 -0000

submitted by: jsirois@threewide.com
version: echo1.1rc1

nextapp.echo.AbstractImageReference neglects a null
check on listenerList member variable on line 74 - rest
of code is lazy-initialization aware.

Easy to fix via subclassing - but looks like the fix
belongs in this class.

v1.1 Grid crash example

Attila Lendvai — Wed, 06 Oct 2004 12:08:18 -0000

Running this code with the new Grid implementation in v1.
1 will end up in an unregistered peer exception at render
time.

the crash only happens if the removeAll() call is there.

public static class delme extends nextapp.echo.Grid
{
public delme()
{
}

public void init\(\)
\{
    super.init\(\);

    add\(0, 0, new nextapp.echo.Label\("asd"\)\);
\}

public void validate\(\)
\{
    removeAll\(\);

    add\(1, 0, new nextapp.echo.Label\("qwe"\)\);

    super.validate\(\);
\}

}

Problems creating a form

Anonymous — Fri, 24 Sep 2004 15:23:25 -0000

Hi,

I just got latest version of EchoStudio... very
impressive soft, nice job.

Although, sometimes, when creating a form, it
crashes and when I get back to eclipse I notice that
the package definition gets wrong it says "ackage
<some_package>" instead of "package <some_package>".

Hope this is helpful.

Application crashes when window to select the file is closed

Anonymous — Thu, 02 Sep 2004 09:50:03 -0000

NullPointerException (StackTrace below)is thrown when
a popup window containing the nextapp's upload select
component is closed.

Details:A popup window contains the upload select
component.Without supplying a proper file path in the
Browse text field, click on send button.
This results in calling invalidFileUpload method of the
UploadListener interface.Before reaching that method
call, just close the popup window abruptly immediately
after clicking the send button.The following
NullPointerException occurs.OutgoingUpdateQueue class
looks for a component peer and in its abscence NPE is
thrown.

WARN [jbossweb] WARNING: cmSuite: EchoServer Error
Log Reference #1001_1093865315179
java.lang.NullPointerException
at
nextapp.echoservlet.OutgoingUpdateQueue.deleteCompo
nentUpdate(OutgoingUpdateQueue.java:109)
at
nextapp.echoservlet.OutgoingUpdateQueue.enqueueWind
owOpen(OutgoingUpdateQueue.java:417)
at
nextapp.echoservlet.ControllerInputProcessor.doWindows
Missing(ControllerInputProcessor.java:201)
at
nextapp.echoservlet.ControllerInputProcessor.<init>
(ControllerInputProcessor.java:123)
at
nextapp.echoservlet.ControllerInputProcessor.process
(ControllerInputProcessor.java:44)
at nextapp.echoservlet.Controller.service
(Controller.java:585)
at nextapp.echoservlet.Connection.process
(Connection.java:441)
at nextapp.echoservlet.EchoServer.process
(EchoServer.java:303)
.................
.................
INFO [jbossweb] cmSuite: EchoServer Error Log
Reference #1001_1093865315179:
java.lang.NullPointerException.

isSelectionEmpty() in DefaultListSelectionModel.java

Forest Zhu — Tue, 24 Aug 2004 10:43:59 -0000

Instead of

public boolean isSelectionEmpty() {
return selection.length() > 0;
}

I guess it should be

public boolean isSelectionEmpty() {
return selection.length() == 0;
}

selection.length() > 0 indicates some selection exists,
this means not empty.