Searched on Google with the first line of a JAVA stack trace?

We can recommend more relevant solutions and speed up debugging when you paste your entire stack trace with the exception message. Try a sample exception.

Recommended solutions based on your search

Solutions on the web

via Icesoft by bLoehle, 1 year ago
This exception has no message.
via sourceforge.net by Unknown author, 2 years ago
This exception has no message.
via GitHub by madmark82
, 2 years ago
via GitHub by alvatar
, 2 years ago
This exception has no message.
via hivmr.com by Unknown author, 1 year ago
via https://bugzilla.redhat.com/bugzilla/ by Amador Pahim, 2 years ago
java.lang.NullPointerException: 	at java.util.concurrent.ConcurrentHashMap.hash(ConcurrentHashMap.java:333)	at java.util.concurrent.ConcurrentHashMap.get(ConcurrentHashMap.java:988)	at org.icepdf.core.util.Library.getObject(Library.java:146)	at org.icepdf.core.pobjects.PageTree.getPageNumber(PageTree.java:225)	at org.icepdf.examples.jsf.viewer.view.OutlineItemTreeNode$NodeUserObject.(OutlineItemTreeNode.java:105)	at org.icepdf.examples.jsf.viewer.view.OutlineItemTreeNode.(OutlineItemTreeNode.java:53)	at org.icepdf.examples.jsf.viewer.view.OutlineItemTreeNode.ensureChildrenLoaded(OutlineItemTreeNode.java:90)	at org.icepdf.examples.jsf.viewer.view.OutlineItemTreeNode.getChildCount(OutlineItemTreeNode.java:74)	at com.icesoft.faces.component.tree.TreeRenderer.encodeParentAndChildNodes(TreeRenderer.java:300)	at com.icesoft.faces.component.tree.TreeRenderer.encodeChildren(TreeRenderer.java:232)	at javax.faces.component.UIComponentBase.encodeChildren(UIComponentBase.java:837)	at com.icesoft.faces.renderkit.dom_html_basic.DomBasicRenderer.encodeParentAndChildren(DomBasicRenderer.java:358)	at com.icesoft.faces.renderkit.dom_html_basic.GroupRenderer.encodeChildren(GroupRenderer.java:96)	at javax.faces.component.UIComponentBase.encodeChildren(UIComponentBase.java:837)	at com.icesoft.faces.renderkit.dom_html_basic.DomBasicRenderer.encodeParentAndChildren(DomBasicRenderer.java:358)	at com.icesoft.faces.component.panelcollapsible.PanelCollapsibleRenderer.encodeChildren(PanelCollapsibleRenderer.java:124)	at javax.faces.component.UIComponentBase.encodeChildren(UIComponentBase.java:837)	at com.icesoft.faces.renderkit.dom_html_basic.DomBasicRenderer.encodeParentAndChildren(DomBasicRenderer.java:358)	at com.icesoft.faces.renderkit.dom_html_basic.GroupRenderer.encodeChildren(GroupRenderer.java:96)	at javax.faces.component.UIComponentBase.encodeChildren(UIComponentBase.java:837)	at com.icesoft.faces.application.D2DViewHandler.renderResponse(D2DViewHandler.java:492)	at com.icesoft.faces.application.D2DViewHandler.renderResponse(D2DViewHandler.java:497)	at com.icesoft.faces.application.D2DViewHandler.renderResponse(D2DViewHandler.java:497)	at com.icesoft.faces.application.D2DViewHandler.renderResponse(D2DViewHandler.java:497)	at com.icesoft.faces.application.D2DViewHandler.renderResponse(D2DViewHandler.java:497)	at com.icesoft.faces.application.D2DViewHandler.renderResponse(D2DViewHandler.java:497)	at com.icesoft.faces.application.D2DViewHandler.renderResponse(D2DViewHandler.java:497)	at com.icesoft.faces.application.D2DViewHandler.renderResponse(D2DViewHandler.java:497)	at com.icesoft.faces.facelets.D2DFaceletViewHandler.renderResponse(D2DFaceletViewHandler.java:282)