Setting <max-active-sessions>-1</max-active-sessions> in WEB-INF/jboss.web.xml causes an exception during deployment in EAP 7.3.0+ for <distributable/> applications:

org.infinispan.commons.CacheConfigurationException: ISPN000424: Memory eviction is enabled, please specify a maximum size or count greater than zero

-1 is a valid value as defined in the .xsd and should be treated as no limit, the same as if the tag was left out.

In practice this is most commonly seen when using property substition to set the property differently in different environments, such as <max-active-sessions>${myprop:-1}</max-active-sessions>.