org.apache.tomcat.util.modeler.Util.objectNameValueNeedsQuote

This error (java.lang.NullPointerException at org.apache.tomcat.util.modeler.Util.objectNameValueNeedsQuote) can show up due to bad syntax in web.xml. Additional SEVERE and ‘Caused by’ lines accompanying it are:

SEVERE: ContainerBase.addChild: start: 
org.apache.catalina.LifecycleException: Failed to initialize component [StandardEngine[Catalina].StandardHost[localhost].StandardContext[].StandardWrapper[null]]
Caused by: java.lang.NullPointerException
at org.apache.tomcat.util.modeler.Util.objectNameValueNeedsQuote(Util.java:26)

SEVERE: ContainerBase.addChild: start:
org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Catalina].StandardHost[localhost].StandardContext[]]
Caused by: java.lang.IllegalStateException: ContainerBase.addChild: start: org.apache.catalina.LifecycleException: Failed to initialize component [StandardEngine[Catalina].StandardHost[localhost].StandardContext[].StandardWrapper[null]]

SEVERE: Error deploying web application directory /home/user/appservers/apache-tomcat-7.0.42/webapps/ROOT java.lang.IllegalStateException: ContainerBase.addChild: start: org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Catalina].StandardHost[localhost].StandardContext[]]

In this particular case there was

<servlet>
<init-param>
<param-name>listings</param-name>
<param-value>false</param-value>
</init-param>
</servlet>

added to web.xml but init-param should be set inside a named servlet (servlet-name is required parameter of each servlet tag) element and in this case servlet name generated by XML parser was null thus the ‘java.lang.NullPointerException at org.apache.tomcat.util.modeler.Util.objectNameValueNeedsQuote’. You may recreate this error by simply pasting

<servlet></servlet>

into web.xml and restarting tomcat.

See also http://docs.oracle.com/cd/E13222_01/wls/docs81/webapp/web_xml.html

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