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http://jira.codehaus.org/browse/DISPL-563?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=154256#action_154256
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Graham Statham commented on DISPL-563:
--------------------------------------
I've been able to consistently reproduce this error:
Caused by: java.lang.NullPointerException
at
org.displaytag.model.RowSorter.checkNullsAndCompare(RowSorter.java:176)
at org.displaytag.model.RowSorter.compare(RowSorter.java:144)
at java.util.Arrays.mergeSort(Arrays.java:1270)
I believe it has to deal with a combination of sorting and exporting. If I set
defaultsort="1" on a table and specify the media='csv excel' on all the
columns, I get this error consistently. If I change the defaultsort="0" then
the columns I have specified are ignored and all columns in the dtos are
displayed. Change the column media='all' and the null pointer error disappears.
I'm running on tomcat 6.0.16, struts 1.3.8, jdk 1.6.0_07, and mysql 4.1.18.
Hope this is helpful.
> Displaytag is thrown a NULL pointer exception.
> ----------------------------------------------
>
> Key: DISPL-563
> URL: http://jira.codehaus.org/browse/DISPL-563
> Project: DisplayTag
> Issue Type: Bug
> Components: Paging/Sorting
> Affects Versions: 1.1
> Reporter: brian yoshida
>
> JSP crashes with the following error message.
> java.lang.NullPointerException at
> org.displaytag.model.RowSorter.checkNullsAndCompare(RowSorter.java:176) at
> org.displaytag.model.RowSorter.compare(RowSorter.java:144) at
> java.util.Arrays.mergeSort(Arrays.java:1278) at
> java.util.Arrays.sort(Arrays.java:1219) at
> java.util.Collections.sort(Collections.java:155) at
> org.displaytag.model.TableModel.sortRowList(TableModel.java:451) at
> org.displaytag.model.TableModel.sortPageList(TableModel.java:473) at
> If we restart the container, it works for a little bit but resorts to the
> behavior above. However, this cannot be reproduced in my development
> environment - which makes it very difficult for me to debug. It only occurs
> when deployed into production. Could it be library synchronization issue or
> other setting issue within the Oracle 10g container? What would cause this?
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