While passivating an entry, SingleFileStore got an exception:

Caused by: java.nio.channels.ClosedChannelException
at sun.nio.ch.FileChannelImpl.ensureOpen(FileChannelImpl.java:110)
at sun.nio.ch.FileChannelImpl.write(FileChannelImpl.java:752)
at org.infinispan.persistence.file.SingleFileStore.write(SingleFileStore.java:345)

We don't have data to verify the initial cause, but are assuming it's a network file system issue or similar.

However, after this occurs it never recovers.  Subsequent calls continue trying to use the same broken channel and getting the same exception.

This should be handled better, such as by catching ClosedChannelException (or a more generic parent) and re-opening the channel.