[Gluster-devel] pre6 - SEGV on first try

[Anand Avati]

August,
  thanks for trying pre6. The bug you have reported was fixed long back,
much before the pre6. Also the line numbers from the backtrace dont match
that of pre6 either. Are you sure that the server you have run is from the
pre6 release? please confirm.

thanks,
avati

2007/7/24, August R. Wohlt <glusterfs at isidore.net>:
>
> Hello,
>
> I downloaded pre6 today and compiled it. glusterfsd starts up
> successfully,
> but if I connect to the socket then disconnect, it segfaults. It does this
> every time. The server never segfaulted with pre5 on the same
> configuration,
> though my clients did at random times after heavy load inside
> write-behind.
> Hope this report helps:
>
> Distro is CentOS 5 - stock kernel, latest yum updates, everything included
> in installation.
> [emu at chai ~]$ uname -a
> Linux chai 2.6.18-8.1.8.el5xen #1 SMP Tue Jul 10 07:06:45 EDT 2007 x86_64
> x86_64 x86_64 GNU/Linux
>
> fuse: fuse-2.7.0 - built by hand with standard installation:
> ./configure
> make
> make install
> modprobe fuse
>
> glusterfs downloaded, untarred and built like so:
>
> ./configure --prefix=/usr
> make CFLAGS='-g -O0'
> make install
>
> started with this config:
>
> volume test_ko
>   type storage/posix
>   option directory /home/vg_3ware1/test/ko
> end-volume
>
> volume test_op
>   type storage/posix
>   option directory /home/vg_3ware1/test/op
> end-volume
>
> ### Add network serving capability to above brick.
> volume server
>   type protocol/server
>   option transport-type tcp/server     # For TCP/IP transport
>   option bind-address 192.168.2.5     # Default is to listen on all
> interfaces
>   subvolumes test_ko test_op
>   option auth.ip.test_op.allow * # Allow access to "brick" volume
>   option auth.ip.test_ko.allow * # Allow access to "brick" volume
> end-volume
>
>
> To produce the segfault, I simply telnet to the port and immediately
> disconnect. Dumps every time:
>
> telnet 192.168.2.5 6996
> ^]quit
>
> Backtrace from gdb shows:
>
> [emu at chai ~]$ sudo gdb glusterfsd
> GNU gdb Red Hat Linux (6.5-16.el5rh)
> Copyright (C) 2006 Free Software Foundation, Inc.
> GDB is free software, covered by the GNU General Public License, and you
> are
> welcome to change it and/or distribute copies of it under certain
> conditions.
> Type "show copying" to see the conditions.
> There is absolutely no warranty for GDB.  Type "show warranty" for
> details.
> This GDB was configured as "x86_64-redhat-linux-gnu"...(no debugging
> symbols found)
> Using host libthread_db library "/lib64/libthread_db.so.1".
>
> (gdb) set args -N
> (gdb) run
> Starting program: /sbin/glusterfsd -N
> warning: Lowest section in system-supplied DSO at 0xffffe000 is .hash at
> ffffe0b4
> (no debugging symbols found)
> (no debugging symbols found)
> [Thread debugging using libthread_db enabled]
> [New Thread 4160661184 (LWP 26983)]
> glusterfsd: WARNING: ignoring stale pidfile for PID 26972
> [New Thread 4160658320 (LWP 26986)]
>
> Program received signal SIGSEGV, Segmentation fault.
> [Switching to Thread 4160661184 (LWP 26983)]
> 0x4a76f2a0 in pthread_mutex_lock () from //lib/libpthread.so.0
> (gdb) bt
> #0  0x4a76f2a0 in pthread_mutex_lock () from //lib/libpthread.so.0
> #1  0xf75dd895 in get_frame_for_transport (trans=0x8055ee0) at
> server-protocol.c:5525
> #2  0xf75de225 in notify (this=0x8050f28, event=2, data=0x8055ee0) at
> server-protocol.c:5638
> #3  0x47611c87 in transport_notify (this=0x0, event=0) at transport.c:152
> #4  0x476126f9 in sys_epoll_iteration (ctx=0xff89f348) at epoll.c:54
> #5  0x47611d5d in poll_iteration (ctx=0xff89f348) at transport.c:260
> #6  0x08049150 in main ()
>
> and the logs show:
>
> 2007-07-24 08:36:28 C [common-utils.c:208:gf_print_trace] debug-backtrace:
> Got signal (11), printing backtrace
> 2007-07-24 08:36:28 C [common-utils.c:210:gf_print_trace] debug-backtrace:
> //lib/libglusterfs.so.0(gf_print_trace+0x2d) [0x476107ed]
> 2007-07-24 08:36:28 C [common-utils.c:210:gf_print_trace] debug-backtrace:
> [0xffffe500]
> 2007-07-24 08:36:28 C [common-utils.c:210:gf_print_trace] debug-backtrace:
> //lib/glusterfs/1.3.0-pre5.3/xlator/protocol/server.so [0xf75dd895]
> 2007-07-24 08:36:28 C [common-utils.c:210:gf_print_trace] debug-backtrace:
> //lib/glusterfs/1.3.0-pre5.3/xlator/protocol/server.so(notify+0x1a5)
> [0xf75de225]
> 2007-07-24 08:36:28 C [common-utils.c:210:gf_print_trace] debug-backtrace:
> //lib/libglusterfs.so.0(transport_notify+0x37) [0x47611c87]
> 2007-07-24 08:36:28 C [common-utils.c:210:gf_print_trace] debug-backtrace:
> //lib/libglusterfs.so.0(sys_epoll_iteration+0xd9) [0x476126f9]
> 2007-07-24 08:36:28 C [common-utils.c:210:gf_print_trace] debug-backtrace:
> //lib/libglusterfs.so.0(poll_iteration+0x1d) [0x47611d5d]
> 2007-07-24 08:36:28 C [common-utils.c:210:gf_print_trace] debug-backtrace:
> [glusterfsd] [0x8049150]
> 2007-07-24 08:36:28 C [common-utils.c:210:gf_print_trace] debug-backtrace:
> //lib/libc.so.6(__libc_start_main+0xdc) [0x4a63edec]
> 2007-07-24 08:36:28 C [common-utils.c:210:gf_print_trace] debug-backtrace:
> [glusterfsd] [0x8048b91]
> 2007-07-24 08:37:13 E [protocol.c:262:gf_block_unserialize_transport]
> libglusterfs/protocol: full_read of  header failed: peer (192.168.2.5)
>
> thanks for the great work!
> -goose
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-- 
Anand V. Avati