NiFi restart on windows failing

[anup s <an...@philips.com>]

I've faced this problem quite often and always ended up restarting my system,
deleting the war manually and starting up NiFi.  Is there an easy way out to
deal with the permission issue?

15-05-19 12:22:31,631 INFO [main] org.eclipse.jetty.server.ServerConnector
Started ServerConnector@7b5a12ae{HTTP/1.1}{localhost:8975}^M
2015-05-19 12:22:31,633 INFO [main] org.eclipse.jetty.server.Server Started
@7572ms^M
2015-05-19 12:22:31,634 WARN [main] org.apache.nifi.web.server.JettyServer
Failed to start web server... shutting down.^M
*java.lang.IllegalStateException: Failed to delete temp dir
D:\BIN\INST\NiFi\nifi-win-3\work\jetty\nifi-update-attribute-ui-0.0.2-incubating.war^M
*        at
org.eclipse.jetty.webapp.WebInfConfiguration.configureTempDirectory(WebInfConfiguration.java:372)
~[jetty-webapp-9.2.5.v20141112.jar:9.2.5.v20141112]^M
        at
org.eclipse.jetty.webapp.WebInfConfiguration.resolveTempDirectory(WebInfConfiguration.java:260)
~[jetty-webapp-9.2.5.v20141112.jar:9.2.5.v20141112]^M
        at
org.eclipse.jetty.webapp.WebInfConfiguration.preConfigure(WebInfConfiguration.java:69)
~[jetty-webapp-9.2.5.v20141112.jar:9.2.5.v20141112]^M
        at
org.eclipse.jetty.webapp.WebAppContext.preConfigure(WebAppContext.java:462)
~[jetty-webapp-9.2.5.v20141112.jar:9.2.5.v20141112]^M
        at
org.eclipse.jetty.webapp.WebAppContext.doStart(WebAppContext.java:498)
~[jetty-webapp-9.2.5.v20141112.jar:9.2.5.v20141112]^M
        at
org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:68)
~[jetty-util-9.2.5.v20141112.jar:9.2.5.v20141112]^M
        at
org.eclipse.jetty.util.component.ContainerLifeCycle.start(ContainerLifeCycle.java:132)
~[jetty-util-9.2.5.v20141112.jar:9.2.5.v20141112]^M
        at
org.eclipse.jetty.util.component.ContainerLifeCycle.doStart(ContainerLifeCycle.java:114)
~[jetty-util-9.2.5.v20141112.jar:9.2.5.v20141112]^M




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