Configuring transport thread pool results in NPE

/extension=org.jboss.as.threads:add
/subsystem=threads:add
/subsystem=threads/bounded-queue-thread-pool=transport:add(max-threads=20,queue-length=1000)
/subsystem=infinispan/cache-container=web/transport=TRANSPORT:write-attribute(name=executor,value=transport)
deploy /home/rhusar/git/clusterbench/clusterbench-ee7-ear/target/clusterbench-ee7.ear

12:37:30,142 ERROR [org.jboss.msc.service.fail] (MSC service thread 1-1) MSC000001: Failed to start service jboss.infinispan.web.config: org.jboss.msc.service.StartException in service jboss.infinispan.web.config: Failed to start service
	at org.jboss.msc.service.ServiceControllerImpl$StartTask.run(ServiceControllerImpl.java:1904)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
	at java.lang.Thread.run(Thread.java:745)
Caused by: java.lang.NullPointerException
	at org.jboss.as.clustering.infinispan.subsystem.CacheContainerConfigurationBuilder.getValue(CacheContainerConfigurationBuilder.java:144)
	at org.jboss.as.clustering.infinispan.subsystem.CacheContainerConfigurationBuilder.getValue(CacheContainerConfigurationBuilder.java:65)
	at org.jboss.msc.service.ValueService.start(ValueService.java:49)
	at org.jboss.msc.service.ServiceControllerImpl$StartTask.startService(ServiceControllerImpl.java:1948)
	at org.jboss.msc.service.ServiceControllerImpl$StartTask.run(ServiceControllerImpl.java:1881)
	... 3 more