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Re: [Gluster-devel] crash in afr

From: Shehjar Tikoo
Subject: Re: [Gluster-devel] crash in afr
Date: Thu, 18 Jun 2009 16:06:45 +0530
User-agent: Mozilla-Thunderbird 2.0.0.19 (X11/20090103) 
I think I understand why you see the crash.
Could you please apply the following patch and tell
us if the crash is observed still?

Thanks
Shehjar



Mihai wrote:

Hello,
I'm using a server side replication on 6 servers. Glusterfsd crashes on a few 
hour basis:
gdb -se /usr/sbin/glusterfsd -c /core.26947 GNU gdb Fedora (6.8-27.el5) 
Copyright (C) 2008 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.  Type "show copying"
and "show warranty" for details.
This GDB was configured as "x86_64-redhat-linux-gnu"...
(no debugging symbols found)

warning: .dynamic section for "/usr/lib64/libglusterfs.so.0" is not at the 
expected address

warning: difference appears to be caused by prelink, adjusting expectations 
Reading symbols from /usr/lib64/libglusterfs.so.0...done.
Loaded symbols for /usr/lib64/libglusterfs.so.0 Reading symbols from 
/lib64/libdl.so.2...done.
Loaded symbols for /lib64/libdl.so.2
Reading symbols from /lib64/libpthread.so.0...done.
Loaded symbols for /lib64/libpthread.so.0 Reading symbols from 
/lib64/libc.so.6...done.
Loaded symbols for /lib64/libc.so.6
Reading symbols from /lib64/ld-linux-x86-64.so.2...done.
Loaded symbols for /lib64/ld-linux-x86-64.so.2 Reading symbols from 
/usr/lib64/glusterfs/2.0.2/xlator/storage/posix.so...done.
Loaded symbols for /usr/lib64/glusterfs/2.0.2/xlator/storage/posix.so
Reading symbols from /usr/lib64/glusterfs/2.0.2/xlator/features/locks.so...done.
Loaded symbols for /usr/lib64/glusterfs/2.0.2/xlator/features/locks.so
Reading symbols from 
/usr/lib64/glusterfs/2.0.2/xlator/performance/io-threads.so...done.
Loaded symbols for /usr/lib64/glusterfs/2.0.2/xlator/performance/io-threads.so
Reading symbols from 
/usr/lib64/glusterfs/2.0.2/xlator/protocol/client.so...done.
Loaded symbols for /usr/lib64/glusterfs/2.0.2/xlator/protocol/client.so
Reading symbols from 
/usr/lib64/glusterfs/2.0.2/xlator/cluster/replicate.so...done.
Loaded symbols for /usr/lib64/glusterfs/2.0.2/xlator/cluster/replicate.so
Reading symbols from 
/usr/lib64/glusterfs/2.0.2/xlator/protocol/server.so...done.
Loaded symbols for /usr/lib64/glusterfs/2.0.2/xlator/protocol/server.so
Reading symbols from /usr/lib64/glusterfs/2.0.2/transport/socket.so...done.
Loaded symbols for /usr/lib64/glusterfs/2.0.2/transport/socket.so
Reading symbols from /usr/lib64/glusterfs/2.0.2/auth/addr.so...done.
Loaded symbols for /usr/lib64/glusterfs/2.0.2/auth/addr.so
Reading symbols from /lib64/libnss_files.so.2...done.
Loaded symbols for /lib64/libnss_files.so.2 Reading symbols from 
/lib64/libgcc_s.so.1...done.
Loaded symbols for /lib64/libgcc_s.so.1
Core was generated by `/usr/sbin/glusterfsd -f /etc/glusterfs/glusterfsd.vol'.
Program terminated with signal 6, Aborted.
[New process 26947]
[New process 26956]
[New process 26955]
[New process 26954]
[New process 26953]
[New process 26952]
[New process 26951]
[New process 26950]
[New process 26949]
[New process 26948]
#0  0x0000003040030215 in raise () from /lib64/libc.so.6
(gdb) bt
#0  0x0000003040030215 in raise () from /lib64/libc.so.6
#1  0x0000003040031cc0 in abort () from /lib64/libc.so.6
#2  0x000000304006a7fb in __libc_message () from /lib64/libc.so.6
#3  0x0000003040071ce2 in _int_free () from /lib64/libc.so.6
#4  0x000000304007590c in free () from /lib64/libc.so.6
#5  0x00002aaaaaaadcc9 in __socket_ioq_entry_free (entry=0x2aaab001da30) at 
socket.c:331
#6  0x00002aaaaaaaf1c9 in __socket_ioq_churn_entry (this=<value optimized out>, 
entry=0x2aaab001da30) at socket.c:368
#7  0x00002aaaaaaaf8ec in socket_submit (this=0xae11a70, buf=0x2aaab00378c0 "", 
len=340, vector=0x0, count=<value optimized out>,
    iobref=<value optimized out>) at socket.c:1281
#8  0x00002b2e7c775bd3 in protocol_client_xfer (frame=0x2aaab0030ab0, 
this=0xae0ab00, trans=0xae11a70, type=1, op=40, hdr=0x2aaab00378c0, hdrlen=340,
    vector=0x0, count=0, iobref=0x0) at client-protocol.c:636
#9  0x00002b2e7c77bc1a in client_xattrop (frame=0x2aaab0030ab0, this=0xae0ab00, 
loc=0x2aaab4004238, flags=GF_XATTROP_ADD_ARRAY, dict=0x2aaab4031fc0)
    at client-protocol.c:1922
#10 0x00002b2e7c9a2cda in afr_changelog_pre_op (frame=0x2aaab401ea70, 
this=0xae0b280) at afr-transaction.c:782
#11 0x00002b2e7c9a2f31 in afr_lock_rec (frame=0x2aaab401ea70, this=0xae0b280, 
child_index=1) at afr-transaction.c:979
#12 0x00002b2e7c9a36a8 in afr_lock_cbk (frame=0x2aaab401ea70, cookie=<value 
optimized out>, this=0xae0b280, op_ret=0, op_errno=0) at afr-transaction.c:906
#13 0x00002b2e7b6a75f0 in default_inodelk_cbk (frame=<value optimized out>, 
cookie=<value optimized out>, this=<value optimized out>, op_ret=-1,
    op_errno=128) at defaults.c:1199
#14 0x00002b2e7c358182 in pl_inodelk (frame=0x2aaab4034c10, this=0xae08870, 
volume=<value optimized out>, loc=0x2aaab4032170, cmd=7, flock=0x0)
    at internal.c:194
#15 0x00002b2e7b6a815c in default_inodelk (frame=0x2aaab4017660, this=0xae09080, 
volume=0xae0b260 "replicate", loc=0x2aaab4004238, cmd=7,
    lock=0x7fff2f422f80) at defaults.c:1209
#16 0x00002b2e7c9a33ba in afr_lock_rec (frame=0x2aaab401ea70, this=0xae0b280, 
child_index=0) at afr-transaction.c:1006
#17 0x00002b2e7c9a35c2 in afr_transaction (frame=0x2aaab401ea70, 
this=0xae0b280, type=AFR_DATA_TRANSACTION) at afr-transaction.c:1170
#18 0x00002b2e7c9a07cd in afr_truncate (frame=0x2aaab403ac30, this=0xae0b280, 
loc=0x2aaab40174a0, offset=0) at afr-inode-write.c:1224
#19 0x00002b2e7cbc0969 in server_truncate_resume (frame=0x2aaab403acc0, 
this=<value optimized out>, loc=0x2aaab40174a0, offset=0) at 
server-protocol.c:4243 #20 0x00002b2e7b6b06f7 in call_resume (stub=0x2aaab4017470) at 
call-stub.c:2384
#21 0x00002b2e7cbc4125 in server_truncate (frame=0x2aaab403acc0, bound_xl=<value optimized 
out>, hdr=<value optimized out>, hdrlen=<value optimized out>,
    iobuf=<value optimized out>) at server-protocol.c:4291
#22 0x00002b2e7cbbfb20 in protocol_server_pollin (this=0xae0bdf0, 
trans=0xae17960) at server-protocol.c:7735
#23 0x00002b2e7cbbfbfb in notify (this=0xae0bdf0, event=<value optimized out>, 
data=0x6) at server-protocol.c:7791
#24 0x00002aaaaaaafb43 in socket_event_handler (fd=<value optimized out>, 
idx=11, data=0xae17960, poll_in=1, poll_out=0, poll_err=0) at socket.c:813
#25 0x00002b2e7b6ba2a5 in event_dispatch_epoll (event_pool=0xae02300) at 
event.c:804
#26 0x0000000000403899 in main ()
(gdb) bt full
#0  0x0000003040030215 in raise () from /lib64/libc.so.6 No symbol table info 
available.
#1  0x0000003040031cc0 in abort () from /lib64/libc.so.6 No symbol table info 
available.
#2  0x000000304006a7fb in __libc_message () from /lib64/libc.so.6 No symbol 
table info available.
#3  0x0000003040071ce2 in _int_free () from /lib64/libc.so.6 No symbol table 
info available.
#4  0x000000304007590c in free () from /lib64/libc.so.6 No symbol table info 
available.
#5  0x00002aaaaaaadcc9 in __socket_ioq_entry_free (entry=0x2aaab001da30) at 
socket.c:331 No locals.
#6  0x00002aaaaaaaf1c9 in __socket_ioq_churn_entry (this=<value optimized out>, 
entry=0x2aaab001da30) at socket.c:368
        ret = 0
        __PRETTY_FUNCTION__ = "__socket_ioq_churn_entry"
#7  0x00002aaaaaaaf8ec in socket_submit (this=0xae11a70, buf=0x2aaab00378c0 "", 
len=340, vector=0x0, count=<value optimized out>,
    iobref=<value optimized out>) at socket.c:1281
        priv = (socket_private_t *) 0xae11ec0
        ret = <value optimized out>
        need_poll_out = <value optimized out>
        entry = (struct ioq *) 0x2aaab001da30
        ctx = (glusterfs_ctx_t *) 0xae02010
        __FUNCTION__ = "socket_submit"
#8  0x00002b2e7c775bd3 in protocol_client_xfer (frame=0x2aaab0030ab0, 
this=0xae0ab00, trans=0xae11a70, type=1, op=40, hdr=0x2aaab00378c0, hdrlen=340,
    vector=0x0, count=0, iobref=0x0) at client-protocol.c:636
        conf = (client_conf_t *) 0xae113c0
        conn = (client_connection_t *) 0xae11f90
        callid = 309893
        ret = <value optimized out>
        rsphdr = {callid = 0, type = 0, op = 0, size = 0, {req = {pid = 0, uid 
= 0, gid = 0}, rsp = {op_ret = 0, op_errno = 0}}}
        forget = {hdr = 0x0, hdrlen = 0, frame = 0x0}
#9  0x00002b2e7c77bc1a in client_xattrop (frame=0x2aaab0030ab0, this=0xae0ab00, 
loc=0x2aaab4004238, flags=GF_XATTROP_ADD_ARRAY, dict=0x2aaab4031fc0)
    at client-protocol.c:1922
        hdr = (gf_hdr_common_t *) 0x101010101010101
        req = <value optimized out>
        dict_len = 242
        ret = <value optimized out>
        pathlen = <value optimized out>
        ino = 13893685
        __FUNCTION__ = "client_xattrop"
#10 0x00002b2e7c9a2cda in afr_changelog_pre_op (frame=0x2aaab401ea70, 
this=0xae0b280) at afr-transaction.c:782
        _new = (call_frame_t *) 0x6943
        priv = (afr_private_t *) 0xae13740
        ret = <value optimized out>
        call_count = 1
        xattr = (dict_t *) 0x2aaab4031fc0
        local = (afr_local_t *) 0x2aaab4004200
        __FUNCTION__ = "afr_changelog_pre_op"
#11 0x00002b2e7c9a2f31 in afr_lock_rec (frame=0x2aaab401ea70, this=0xae0b280, 
child_index=1) at afr-transaction.c:979
        local = (afr_local_t *) 0x2aaab4004200
        priv = (afr_private_t *) 0xae13740
        flock = {l_type = 1, l_whence = 12098, l_start = 0, l_len = 0, l_pid = 
792866320}
        lower = <value optimized out>
        higher = <value optimized out>
        lower_name = <value optimized out>
        higher_name = <value optimized out>
        __FUNCTION__ = "afr_lock_rec"
#12 0x00002b2e7c9a36a8 in afr_lock_cbk (frame=0x2aaab401ea70, cookie=<value optimized out>, 
this=0xae0b280, op_ret=0, op_errno=0) at afr-transaction.c:906 ---Type <return> to 
continue, or q <return> to quit---
        local = (afr_local_t *) 0x2aaab4004200
        child_index = 0
        call_count = 0
        __FUNCTION__ = "afr_lock_cbk"
#13 0x00002b2e7b6a75f0 in default_inodelk_cbk (frame=<value optimized out>, 
cookie=<value optimized out>, this=<value optimized out>, op_ret=-1,
    op_errno=128) at defaults.c:1199
        fn = (ret_fn_t) 0x101010101010101
        _parent = (call_frame_t *) 0x6943
#14 0x00002b2e7c358182 in pl_inodelk (frame=0x2aaab4034c10, this=0xae08870, 
volume=<value optimized out>, loc=0x2aaab4032170, cmd=7, flock=0x0)
    at internal.c:194
        fn = (ret_fn_t) 0x101010101010101
        _parent = (call_frame_t *) 0x6943
        op_ret = -1
        op_errno = 128
        ret = 0
        can_block = 1
        transport = <value optimized out>
        client_pid = 1
        pinode = (pl_inode_t *) 0x2aaab0032810
        reqlock = (posix_lock_t *) 0x2aaab4032170
        __FUNCTION__ = "pl_inodelk"
#15 0x00002b2e7b6a815c in default_inodelk (frame=0x2aaab4017660, this=0xae09080, 
volume=0xae0b260 "replicate", loc=0x2aaab4004238, cmd=7,
    lock=0x7fff2f422f80) at defaults.c:1209
        _new = (call_frame_t *) 0x6943
#16 0x00002b2e7c9a33ba in afr_lock_rec (frame=0x2aaab401ea70, this=0xae0b280, 
child_index=0) at afr-transaction.c:1006
        _new = (call_frame_t *) 0x6943
        local = (afr_local_t *) 0x2aaab4004200
        priv = (afr_private_t *) 0xae13740
        flock = {l_type = 1, l_whence = 1, l_start = 0, l_len = 0, l_pid = 
1074216160}
        lower = <value optimized out>
        higher = <value optimized out>
        lower_name = <value optimized out>
        higher_name = <value optimized out>
        __FUNCTION__ = "afr_lock_rec"
#17 0x00002b2e7c9a35c2 in afr_transaction (frame=0x2aaab401ea70, 
this=0xae0b280, type=AFR_DATA_TRANSACTION) at afr-transaction.c:1170
        local = (afr_local_t *) 0x2aaab4004200
        priv = (afr_private_t *) 0xae13740
#18 0x00002b2e7c9a07cd in afr_truncate (frame=0x2aaab403ac30, this=0xae0b280, 
loc=0x2aaab40174a0, offset=0) at afr-inode-write.c:1224
        transaction_frame = (call_frame_t *) 0x2aaab401ea70
        op_errno = 107
        __FUNCTION__ = "afr_truncate"
#19 0x00002b2e7cbc0969 in server_truncate_resume (frame=0x2aaab403acc0, 
this=<value optimized out>, loc=0x2aaab40174a0, offset=0) at 
server-protocol.c:4243
        _new = (call_frame_t *) 0x6943
        __FUNCTION__ = "server_truncate_resume"
#20 0x00002b2e7b6b06f7 in call_resume (stub=0x2aaab4017470) at call-stub.c:2384
        __FUNCTION__ = "call_resume"
#21 0x00002b2e7cbc4125 in server_truncate (frame=0x2aaab403acc0, bound_xl=<value optimized 
out>, hdr=<value optimized out>, hdrlen=<value optimized out>,
    iobuf=<value optimized out>) at server-protocol.c:4291
        truncate_stub = (call_stub_t *) 0x0
        state = (server_state_t *) 0x2aaab4032000
#22 0x00002b2e7cbbfb20 in protocol_server_pollin (this=0xae0bdf0, 
trans=0xae17960) at server-protocol.c:7735
        hdr = 0x2aaab4017330 ""
        hdrlen = 98
        ret = 0
        iobuf = (struct iobuf *) 0x0
#23 0x00002b2e7cbbfbfb in notify (this=0xae0bdf0, event=<value optimized out>, 
data=0x6) at server-protocol.c:7791
        ret = <value optimized out>
        trans = (transport_t *) 0x6943
---Type <return> to continue, or q <return> to quit---
        peerinfo = (peer_info_t *) 0xae179d0
        myinfo = (peer_info_t *) 0xae17ac0
        __FUNCTION__ = "notify"
#24 0x00002aaaaaaafb43 in socket_event_handler (fd=<value optimized out>, 
idx=11, data=0xae17960, poll_in=1, poll_out=0, poll_err=0) at socket.c:813
        this = (transport_t *) 0x6943
        priv = (socket_private_t *) 0xae16ce0
        ret = 0
#25 0x00002b2e7b6ba2a5 in event_dispatch_epoll (event_pool=0xae02300) at 
event.c:804
        events = (struct epoll_event *) 0xae15990
        i = 0
        ret = 1
        __FUNCTION__ = "event_dispatch_epoll"
#26 0x0000000000403899 in main ()
No symbol table info available.





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>From 6480ee1e9a2a904d8c1febcdb542553bf24638c7 Mon Sep 17 00:00:00 2001
From: Shehjar Tikoo <address@hidden>
Date: Thu, 18 Jun 2009 16:04:23 +0530
Subject: [PATCH] socket: Prevent freeing of buf through free

---
 transport/socket/src/socket.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/transport/socket/src/socket.c b/transport/socket/src/socket.c
index 9035eaf..5280574 100644
--- a/transport/socket/src/socket.c
+++ b/transport/socket/src/socket.c
@@ -328,7 +328,7 @@ __socket_ioq_entry_free (struct ioq *entry)
                 iobref_unref (entry->iobref);
 
         /* TODO: use mem-pool */
-        free (entry->buf);
+        //free (entry->buf);
 
         /* TODO: use mem-pool */
         free (entry);
-- 
1.6.2.1
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