What do you mean “Failed saving metadata to metadataCache”?

Seeing this in Zend? It’s probably an issue with your memcached connection. Check settings in application.ini, namely:

resources.cache.core.backend.options.servers.host = ""
resources.cache.core.backend.options.servers.port = 11211

and make sure you can connect to where it’s pointing:

$ telnet localhost 11211
Connected to localhost.
Escape character is '^]'.
STAT pid 9528
STAT uptime 374
STAT time 1344441815
STAT version 1.2.6

Similar to the zend_mm_heap corrupted thing.