bzr commit into mysql-6.0-falcon-team branch (vvaintroub:2942) Bug#41545

[Vladislav Vaintroub]

#At file:///G:/bzr/mysql-6.0-falcon-team/

 2942 Vladislav Vaintroub	2008-12-17
      Bug #41545 sporadic pushbuild failure: [Falcon] Error: read error on database header
      
      Falcon crashes in ASSERT if it cannot read header from tablespace. The actual
problem
      seems to be the lack of diskspace on the pushbuild box.
      
      Solution: throw exception instead of ASSERT. Exceptions are caught within plugin
initialization code, i.e errors like this are handled gracefully 
      with error message instead of just aborting the server.
modified:
  storage/falcon/IO.cpp

=== modified file 'storage/falcon/IO.cpp'
--- a/storage/falcon/IO.cpp	2008-11-20 17:05:50 +0000
+++ b/storage/falcon/IO.cpp	2008-12-17 16:26:04 +0000
@@ -390,7 +390,9 @@ void IO::readHeader(Hdr * header)
 	n = ::read (fileId, buffer, maxPageSize);
 
 	if (n < (int) sizeof (Hdr))
-		FATAL ("read error on database header");
+		throw SQLError(IO_ERROR,
+		"read error on tablespace header, file %s, read %d bytes at least %d was expected",
+		fileName.getString(), n, (int)sizeof(Hdr));
 
 	Hdr* hdr = (Hdr*) buffer;
 	if (falcon_checksums && hdr->pageSize <= n)