When initiating the DefaultCacheManager with an absolute windows path from within Glassfish, a IllegalArgumentException is thrown before the configuration is even tried to be read with FileInputStream.

SEVERE: org.infinispan.config.ConfigurationException: java.lang.IllegalArgumentException: name
at org.infinispan.manager.DefaultCacheManager.<init>(DefaultCacheManager.java:256)

The problem is easily reproducible by doing:
new DefaultCacheManager("c:
cachetest.xml");

From within a servlet.

The reason for this problem is found in FileLookup.java line 68, and happens because the classloader throws an IllegalArgumentException for the path provided.

A simple solution would be to catch runtime exceptions when we try to load a resource from the cache loader, and then fall back to reading the config file with FileInputStream