Hi all,
I've a linux server with fedora 3 kernel 2.6.12;
firebird 1.54 NPTL 2.3.6 with no UDF implemented in db structure
the application is based on PHP 4.4.5
randomly in logs this error appears and firebird process halts


db (Server) Wed Apr 18 06:11:22 2007
SCH_validate -- not entered

db (Server) Wed Apr 18 06:13:22 2007
INET/inet_error: read errno = 88

db (Server) Wed Apr 18 06:13:22 2007
INET/inet_error: send errno = 88

db (Server) Wed Apr 18 06:13:22 2007
Database:
I/O error for file "master.fdb"
Error while trying to write to file
Bad file descriptor

the only solution is to kill and restart the process.

We know there is a correspondece between SCH_VALIDATE error and UDF
but, as i've wrote, we don't have any UDF on this database.

what are the possible causes?

thanx