In each hang that I have had on 41.0.0, the first sign of anything amiss is
[org.infinispan.persistence.sifs.Index] (blocking-thread-peapp-c-p22-t183) Error encountered with index, SIFS may not operate properly.: java.io.UncheckedIOException: java.io.IOException: Truncated node store at offset nnnnn
Then we start getting these:
[org.infinispan.interceptors.impl.InvocationContextInterceptor] (non-blocking-thread-peapp-c-p21-t3) ISPN000136: Error executing command GetKeyValueCommand on Cache 'compent.ear', writing keys []: org.infinispan.persistence.spi.PersistenceException: ISPN029019: Cannot load key SessionAttributesKey(60Aj28OI957JF0kiNXAPJ6jafOduQFoIq3UGldpg) from index
And then things start hanging.
40.0.0 ships with infinispan 16.0.11 dated 21 May, whereas 41.0.0 ships with 16.0.13 dated 16 July. Infinispan merged a patch on 8 June but it does not look to have been backported to the 16.0.x branch.
Anyway, it doesn't look as though 41.0.0.Final is viable for me, so am running on 40.0.0.Final for now.
Regards, Chris