Spectrum IP Routing Manager REX Connector will not start

Document ID : KB000019547
Last Modified Date : 14/02/2018
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Description:

REX Connector will not start, following errors are seen in the REXCON.OUT file

Exception in thread "main" java.lang.NoClassDefFoundError:
com/aprisma/spectrum/app/rex/connector/REXConnector
Caused by: java.lang.ClassNotFoundException:
com.aprisma.spectrum.app.rex.connector.REXConnector

at java.net.URLClassLoader$1.run(URLClassLoader.java:202)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:190)
at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)
at java.lang.ClassLoader.loadClass(ClassLoader.java:247)

Could not find the main class:
com.aprisma.spectrum.app.rex.connector.REXConnector. Program will exit.

Solution:

Most likely cause of this error message is DNS issues preventing the REX Connector from communicating with the SpectroSERVER.
Verify correct DNS response and population of OS Host files with correct IP Address Hostname and FQDN.