Hi
I met same problem with Oracle 11g using ojdbc5 & orai18n, declaring Oracle9Dialect for hibernate in global properties, trying retrying and googling: it seems it was a known issue on linux 64bit installer fixed with 201602-GA rel...but I met it with both 201605-GA and 201611-EA, also overriding install with .zip of 201605-GA rel.
I'm going very stuck & angry & tired...I worked (fine) for 3 years with ENterprise One...could someone help me please???
I met same issue before on a test install of 4.2.f..............
Alfresco Community does not support Oracle.
That will not work at all, unless you do all the hard work to implement the persistence layer for it.