Cache\\Adapter\\Common\\Exception\\InvalidArgumentException: Invalid key "DoctrineNamespaceCacheKey[]". Valid filenames must match [a-zA-Z0-9_\\.! ].

I'm getting the above when using the doctrine bridge with a chain pool which includes a filesystem adapter in the context of Doctrine ORM cache implementations(metadata, query, results). I worked around this by removing the filesystem from the chain(probably too slow anyway).

Might be worth putting a warning on the docs to clarify that the Doctrine bridge doesn't work with the fs cache implementation.