shg sistemas wrote
<<
Hello! This is a bit of firebird.log (just the lines with errors) of
the last few days.
Thanks!!!

BARO (Client) Tue May 12 12:20:20 2015
"C:\Program Files\Firebird Firebird_2_5\bin\fbserver.exe":
terminated abnormally (4294967295)

BARO (Server) Tue May 12 12:30:24 2015
*** DUMP ***

BARO (Server) Tue May 12 12:30:24 2015
Fatal exception during clumplet dump: Invalid clumplet buffer
structure: spb in service attach should begin with isc_spb_version1
or isc_spb_version

BARO (Server) Tue May 12 12:30:24 2015
Plain dump starting with offset 893:
araSlZfMaehCCOyPmJJrIwcTxhqacRmZTqcNgJYlugrSrAlLLYdbXcYfgnmke

...

>>

I see much of the same happening. It started with the occasional
message in December 2014, but in May it got much more frequent (with
abnormal termination and restarts).
This is a Win2008R2 server with 64bit Firebird 2.5.1.
The server was rebooted, but that did not fix the problem.
This server has been running since 2012 (with the same set of
databases) with hardly a problem. The fbclient on remote clients
could be anything from version 1.5 to 2.5.

Last night we upgraded to latest Fb 2.5.4 (reboot after installing a
number of Windows updates).
The databases (sizes: 2GB and 16GB) were backuped with Fb/2.5.1 and
restored with Fb/2.5.4. No hickups.
The databases are accessed with internet connections (in addition to
the local network).
It looked fine for a short time...

The log contains this (after the upgrade to 2.5.4):
===================================================================
FILMINFOSERVER (Client) Wed May 13 20:37:15 2015
Guardian starting: "C:\Program Files\Firebird\Firebird_2_5\bin\fbserver.exe"

FILMINFOSERVER (Server) Thu May 14 02:04:08 2015
*** DUMP ***

FILMINFOSERVER (Server) Thu May 14 02:04:08 2015
Tag=-1 Offset=34 Length=36 Eof=0

FILMINFOSERVER (Server) Thu May 14 02:04:08 2015
Clump 5 at offset 0:
D<13><83>J<f4><e1>Z<00><a4><1e>^<00><eb><ff>Y<00><<15><00><00><1f>&]<00><1f><fe>Y<00><15>loc

FILMINFOSERVER (Server) Thu May 14 02:04:08 2015
Fatal exception during clumplet dump: Invalid clumplet buffer
structure: buffer end before end of clumplet - clumplet too long

FILMINFOSERVER (Server) Thu May 14 02:04:08 2015
Plain dump starting with offset 34: al

FILMINFOSERVER (Server) Thu May 14 02:05:12 2015
*** DUMP ***

FILMINFOSERVER (Server) Thu May 14 02:05:12 2015
Tag=-1 Offset=34 Length=36 Eof=0

FILMINFOSERVER (Server) Thu May 14 02:05:12 2015
Clump 5 at offset 0:
<d5>cW<00>E<df><d5>JD<b8>U<00>w<ee><86>J<c0><01><00><00>c<ee>Z<00>&<d3><82>J<15>loc

FILMINFOSERVER (Server) Thu May 14 02:05:12 2015
Fatal exception during clumplet dump: Invalid clumplet buffer
structure: buffer end before end of clumplet - clumplet too long

FILMINFOSERVER (Server) Thu May 14 02:05:12 2015
Plain dump starting with offset 34: al

FILMINFOSERVER (Server) Thu May 14 02:07:46 2015
*** DUMP ***

FILMINFOSERVER (Server) Thu May 14 02:07:46 2015
Tag=-1 Offset=34 Length=36 Eof=0

FILMINFOSERVER (Server) Thu May 14 02:07:46 2015
Clump 5 at offset 0:
rde<00><fa>"<dd>J<b8><1a>^<00><0b>eY<00><<15><00><00><ff><f6>\<00><db><a3>Y<00><15>loc

FILMINFOSERVER (Server) Thu May 14 02:07:46 2015
Fatal exception during clumplet dump: Invalid clumplet buffer
structure: buffer end before end of clumplet - clumplet too long

FILMINFOSERVER (Server) Thu May 14 02:07:46 2015
Plain dump starting with offset 34: al

FILMINFOSERVER (Server) Thu May 14 02:13:24 2015
*** DUMP ***

FILMINFOSERVER (Server) Thu May 14 02:13:24 2015
Tag=-1 Offset=34 Length=36 Eof=0

FILMINFOSERVER (Server) Thu May 14 02:13:24 2015
Clump 5 at offset 0:
)4<84>J<cd>N<df>JL&B<00><e1>&<80>J<c0><01><00><00><99>TL<00>dv<84>J<15>loc

FILMINFOSERVER (Server) Thu May 14 02:13:24 2015
Fatal exception during clumplet dump: Invalid clumplet buffer
structure: buffer end before end of clumplet - clumplet too long

FILMINFOSERVER (Server) Thu May 14 02:13:24 2015
Plain dump starting with offset 34: al

FILMINFOSERVER (Server) Thu May 14 02:24:24 2015
*** DUMP ***

FILMINFOSERVER (Server) Thu May 14 02:24:24 2015
Fatal exception during clumplet dump: Invalid clumplet buffer
structure: spb in service attach should begin with isc_spb_version1
or isc_spb_version

FILMINFOSERVER (Server) Thu May 14 02:24:24 2015
Plain dump starting with offset 927: zrPRZJCkLgJbqbqHa

FILMINFOSERVER (Server) Thu May 14 02:24:27 2015
INET/inet_error: read errno = 10054

FILMINFOSERVER (Server) Thu May 14 03:16:50 2015
INET/inet_error: read errno = 10054
===================================================================

This is an unfortunate situation - I hope someone can offer guidance.

TiA
Aage J.