MissingFormatArgumentException during mbean registration

Relevant bit of stacktrace:

Caused by: org.infinispan.CacheException: Failure while registering mbeans
at org.infinispan.jmx.ComponentsJmxRegistration.registerMBeans(ComponentsJmxRegistration.java:104) [:4.2.1.CR1]
at org.infinispan.jmx.AbstractJmxRegistration.registerMBeans(AbstractJmxRegistration.java:52) [:4.2.1.CR1]
at org.infinispan.jmx.CacheJmxRegistration.start(CacheJmxRegistration.java:82) [:4.2.1.CR1]
... 113 more
Caused by: java.util.MissingFormatArgumentException: Format specifier 's'
at java.util.Formatter.format(Formatter.java:2448) [:1.6.0_21]
at java.util.Formatter.format(Formatter.java:2383) [:1.6.0_21]
at java.lang.String.format(String.java:2781) [:1.6.0_21]
at org.infinispan.jmx.ComponentsJmxRegistration.registerMBeans(ComponentsJmxRegistration.java:99) [:4.2.1.CR1]