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Posted to users@myfaces.apache.org by "R. Müller" <r....@unicomp-berlin.de> on 2005/11/23 12:36:05 UTC
DataTable again
hi group,
i work with JSF and myfaces since several months and have to point out
that one of the most weaknesses is, that its sometimes extremly hard to
figure out what the problem exactly is.
I think it would be high desirable, that there would be more debbuging
output from the customs components for instance.
I've found a very little use of log4j in the sources, but thats the
simplest approach to improve this issue.
by the way : no idea whats going on here
I've got a datatable thats display some database information, which will
delivered from a backing-bean. The website refresh thereself every
minute. Sometimes the table is not displayed again after the refresh.
Instead the logs show the following error !?
Any hints ?
2005-11-23 12:14:16 ApplicationDispatcher[/ASM] Servlet.service() for
servlet jsp threw exception
java.lang.NullPointerException
at
org.apache.myfaces.component.html.ext.HtmlDataTableHack.restoreDescendantComponentStates(HtmlDataTableHack.java:245)
at
org.apache.myfaces.component.html.ext.HtmlDataTableHack.restoreDescendantComponentStates(HtmlDataTableHack.java:257)
at
org.apache.myfaces.component.html.ext.HtmlDataTableHack.restoreDescendantComponentStates(HtmlDataTableHack.java:257)
at
org.apache.myfaces.component.html.ext.HtmlDataTableHack.setRowIndex(HtmlDataTableHack.java:208)
at
org.apache.myfaces.component.html.ext.HtmlDataTable.setRowIndex(HtmlDataTable.java:127)
at
org.apache.myfaces.renderkit.html.HtmlTableRendererBase.encodeInnerHtml(HtmlTableRendererBase.java:135)
at
org.apache.myfaces.renderkit.html.HtmlTableRendererBase.encodeChildren(HtmlTableRendererBase.java:94)
at
org.apache.myfaces.renderkit.html.ext.HtmlTableRenderer.encodeChildren(HtmlTableRenderer.java:57)
at
javax.faces.component.UIComponentBase.encodeChildren(UIComponentBase.java:319)
at
javax.faces.webapp.UIComponentTag.encodeChildren(UIComponentTag.java:343)
at
javax.faces.webapp.UIComponentTag.doEndTag(UIComponentTag.java:251)
at
org.apache.myfaces.taglib.UIComponentBodyTagBase.doEndTag(UIComponentBodyTagBase.java:55)
[...]
Thank you
Ronald
Re: DataTable again
Posted by Mathias Brökelmann <mb...@googlemail.com>.
which version of myfaces do you use? Have you tried the latest nightly?
If that will not fix the issue can you give use your jsp code for the datatable.
2005/11/23, "R. Müller" <r....@unicomp-berlin.de>:
> hi group,
>
> i work with JSF and myfaces since several months and have to point out
> that one of the most weaknesses is, that its sometimes extremly hard to
> figure out what the problem exactly is.
> I think it would be high desirable, that there would be more debbuging
> output from the customs components for instance.
> I've found a very little use of log4j in the sources, but thats the
> simplest approach to improve this issue.
>
> by the way : no idea whats going on here
>
> I've got a datatable thats display some database information, which will
> delivered from a backing-bean. The website refresh thereself every
> minute. Sometimes the table is not displayed again after the refresh.
> Instead the logs show the following error !?
>
> Any hints ?
>
>
>
> 2005-11-23 12:14:16 ApplicationDispatcher[/ASM] Servlet.service() for
> servlet jsp threw exception
> java.lang.NullPointerException
> at
> org.apache.myfaces.component.html.ext.HtmlDataTableHack.restoreDescendantComponentStates(HtmlDataTableHack.java:245)
> at
> org.apache.myfaces.component.html.ext.HtmlDataTableHack.restoreDescendantComponentStates(HtmlDataTableHack.java:257)
> at
> org.apache.myfaces.component.html.ext.HtmlDataTableHack.restoreDescendantComponentStates(HtmlDataTableHack.java:257)
> at
> org.apache.myfaces.component.html.ext.HtmlDataTableHack.setRowIndex(HtmlDataTableHack.java:208)
> at
> org.apache.myfaces.component.html.ext.HtmlDataTable.setRowIndex(HtmlDataTable.java:127)
> at
> org.apache.myfaces.renderkit.html.HtmlTableRendererBase.encodeInnerHtml(HtmlTableRendererBase.java:135)
> at
> org.apache.myfaces.renderkit.html.HtmlTableRendererBase.encodeChildren(HtmlTableRendererBase.java:94)
> at
> org.apache.myfaces.renderkit.html.ext.HtmlTableRenderer.encodeChildren(HtmlTableRenderer.java:57)
> at
> javax.faces.component.UIComponentBase.encodeChildren(UIComponentBase.java:319)
> at
> javax.faces.webapp.UIComponentTag.encodeChildren(UIComponentTag.java:343)
> at
> javax.faces.webapp.UIComponentTag.doEndTag(UIComponentTag.java:251)
> at
> org.apache.myfaces.taglib.UIComponentBodyTagBase.doEndTag(UIComponentBodyTagBase.java:55)
> [...]
>
> Thank you
>
> Ronald
>
--
Mathias
Re: DataTable again
Posted by Simon Kitching <sk...@obsidium.com>.
R. Müller wrote:
> hi group,
>
> i work with JSF and myfaces since several months and have to point out
> that one of the most weaknesses is, that its sometimes extremly hard to
> figure out what the problem exactly is.
> I think it would be high desirable, that there would be more debbuging
> output from the customs components for instance.
> I've found a very little use of log4j in the sources, but thats the
> simplest approach to improve this issue.
>
> by the way : no idea whats going on here
>
> I've got a datatable thats display some database information, which will
> delivered from a backing-bean. The website refresh thereself every
> minute. Sometimes the table is not displayed again after the refresh.
> Instead the logs show the following error !?
>
> Any hints ?
>
>
>
> 2005-11-23 12:14:16 ApplicationDispatcher[/ASM] Servlet.service() for
> servlet jsp threw exception
> java.lang.NullPointerException
> at
> org.apache.myfaces.component.html.ext.HtmlDataTableHack.restoreDescendantComponentStates(HtmlDataTableHack.java:245)
>
Does your table contain input components? The fact that there are any
descendant component states to restore suggests it to me.
If the table has input components, then the datamodel that is fetched by
the datatable after the form is submitted *must be identical* to the one
present when the table was rendered.
Regards,
Simon
Re: DataTable again
Posted by Martin Marinschek <ma...@gmail.com>.
It's easy to fix that in Open Source..
...help us out by providing logging statements.
I'm sure we'll happily commit them.
regards,
Martin
On 11/23/05, "R. Müller" <r....@unicomp-berlin.de> wrote:
> hi group,
>
> i work with JSF and myfaces since several months and have to point out
> that one of the most weaknesses is, that its sometimes extremly hard to
> figure out what the problem exactly is.
> I think it would be high desirable, that there would be more debbuging
> output from the customs components for instance.
> I've found a very little use of log4j in the sources, but thats the
> simplest approach to improve this issue.
>
> by the way : no idea whats going on here
>
> I've got a datatable thats display some database information, which will
> delivered from a backing-bean. The website refresh thereself every
> minute. Sometimes the table is not displayed again after the refresh.
> Instead the logs show the following error !?
>
> Any hints ?
>
>
>
> 2005-11-23 12:14:16 ApplicationDispatcher[/ASM] Servlet.service() for
> servlet jsp threw exception
> java.lang.NullPointerException
> at
> org.apache.myfaces.component.html.ext.HtmlDataTableHack.restoreDescendantComponentStates(HtmlDataTableHack.java:245)
> at
> org.apache.myfaces.component.html.ext.HtmlDataTableHack.restoreDescendantComponentStates(HtmlDataTableHack.java:257)
> at
> org.apache.myfaces.component.html.ext.HtmlDataTableHack.restoreDescendantComponentStates(HtmlDataTableHack.java:257)
> at
> org.apache.myfaces.component.html.ext.HtmlDataTableHack.setRowIndex(HtmlDataTableHack.java:208)
> at
> org.apache.myfaces.component.html.ext.HtmlDataTable.setRowIndex(HtmlDataTable.java:127)
> at
> org.apache.myfaces.renderkit.html.HtmlTableRendererBase.encodeInnerHtml(HtmlTableRendererBase.java:135)
> at
> org.apache.myfaces.renderkit.html.HtmlTableRendererBase.encodeChildren(HtmlTableRendererBase.java:94)
> at
> org.apache.myfaces.renderkit.html.ext.HtmlTableRenderer.encodeChildren(HtmlTableRenderer.java:57)
> at
> javax.faces.component.UIComponentBase.encodeChildren(UIComponentBase.java:319)
> at
> javax.faces.webapp.UIComponentTag.encodeChildren(UIComponentTag.java:343)
> at
> javax.faces.webapp.UIComponentTag.doEndTag(UIComponentTag.java:251)
> at
> org.apache.myfaces.taglib.UIComponentBodyTagBase.doEndTag(UIComponentBodyTagBase.java:55)
> [...]
>
> Thank you
>
> Ronald
>
--
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