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    Thrown when an application is trying to use or access an object whose reference equals to null. You are probably trying to use a reference that points to no location in memory as though it were referencing an object.

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via Spring JIRA by Tim Lenz, 1 year ago
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java.lang.NullPointerException at java.lang.Throwable.<init>(Throwable.java) at java.util.Hashtable.put(Hashtable.java) at org.apache.jasper.runtime.PageContextImpl.setAttribute(PageContextImpl.java:260) at org.springframework.web.servlet.tags.form.ErrorsTag.removeAttributes(ErrorsTag.java) at org.springframework.web.servlet.tags.form.AbstractHtmlElementBodyTag.doFinally(AbstractHtmlElementBodyTag.java:84) at org.springframework.web.servlet.tags.form.ErrorsTag.doFinally(ErrorsTag.java:113)