(The following also applies to Ice 3.2.1)
We have the following setup:
- Java server running inside of IceGrid, behind Glacier2
- Trivial python client accessing a Glacier2 session
The client logs in and can interact with the server normally. When trying to acquire one particular servant (of many) via the session facade, the client segfaults and "Bus error" is printed.
The gdb output for the client is:
Code:
(gdb) run buserror.py
Starting program: /opt/local/bin/python buserror.py
Reading symbols for shared libraries . done
Program received signal SIGTRAP, Trace/breakpoint trap.
0x8fe01010 in __dyld__dyld_start ()
(gdb) c
Continuing.
Reading symbols for shared libraries ... done
Reading symbols for shared libraries . done
Reading symbols for shared libraries . done
Reading symbols for shared libraries . done
Reading symbols for shared libraries . done
Reading symbols for shared libraries ...... done
08/12/08 16:58:37.966 warning: deprecated property: Ice.MonitorConnections
Now
Program received signal EXC_BAD_ACCESS, Could not access memory.
Reason: KERN_PROTECTION_FAILURE at address: 0x00000000
0x007224e9 in IcePy::SyncTypedInvocation::invoke ()
(gdb) bt
#0 0x007224e9 in IcePy::SyncTypedInvocation::invoke ()
#1 0x0071b6fb in operationInvoke ()
#2 0x0027fa7e in PyEval_EvalFrame (f=0x6083f0) at Python/ceval.c:3568
#3 0x00280619 in PyEval_EvalCodeEx (co=0x13a6620, globals=0x5b14b0, locals=0x0, args=0x608cfc, argcount=1, kws=0x608d00, kwcount=0, defs=0x13f263c, defcount=1, closure=0x0) at Python/ceval.c:2741
#4 0x0027e453 in PyEval_EvalFrame (f=0x608bb0) at Python/ceval.c:3661
#5 0x00280619 in PyEval_EvalCodeEx (co=0x4fe60, globals=0x20a50, locals=0x20a50, args=0x0, argcount=0, kws=0x0, kwcount=0, defs=0x0, defcount=0, closure=0x0) at Python/ceval.c:2741
#6 0x00280859 in PyEval_EvalCode (co=0x4fe60, globals=0x20a50, locals=0x20a50) at Python/ceval.c:484
#7 0x002a75b1 in PyRun_FileExFlags (fp=0xa000bda0, filename=0xbfffd8f3 "buserror.py", start=257, globals=0x20a50, locals=0x20a50, closeit=1, flags=0xbfffd608) at Python/pythonrun.c:1287
#8 0x002a7894 in PyRun_SimpleFileExFlags (fp=0xa000bda0, filename=0xbfffd8f3 "buserror.py", closeit=1, flags=0xbfffd608) at Python/pythonrun.c:871
#9 0x002b13dc in Py_Main (argc=1, argv=0xbfffd688) at Modules/main.c:493
#10 0x000018ee in ?? ()
#11 0x00001815 in ?? ()
(gdb)
The client code is:
Code:
import omero
c = omero.client()
s = c.createSession()
print "Now"
s.getScriptService()
The bus error is triggered at line 263 in IceInternal.ServantManager.java. (connection.sendResponse) and no exception shows up in the server.
An interesting corollary is that the log file for the server is halted (for lack of a better term) on the first bus error. I.e. our log statement "Creating servant" is printed, and afterwards nothing else
even though further interactions are possible with the server.