[MonetDB-users] Core dump on first connect by mclient in BUNinplace
So we've been testing out a big ETL and it crashed again, and now every time we start mserver5 it will seemingly start up ok but as soon as mclient connects it will crash. I've generated a core dump. The db farm is 3.6GB and the core dump is 15MB. I can send either to someone if they need it to look further into the issue. The platform is 2.6.20-15-generic (root@yellow) (gcc version 4.1.2 (Ubuntu 4.1.2-0ubuntu4)) #2 SMP on amd64. It's running an unmodified SR5 superball that we compiled ourselves. I tried looking at strace and the --debug option with all of the flags on but it didn't produce anything that looked very interesting. The backtrace is here: Core was generated by `//mochi/bin/mserver5 --dbname=mochiads_stats --dbinit=include sql; --dbfarm=/da'. Program terminated with signal 11, Segmentation fault. #0 0x00002b88a35bf285 in BUNinplace (b=0x12458e8, p=0x0, h=<value optimized out>, t=0x1246eb0, force=1 '\001') at /ufs/sjoerd/src/MonetDB/virgin-stable/MonetDB/src/gdk/gdk_bat.mx:1555 1555 ATOMreplace(b->ttype, b->theap, BUNtloc(b, p), t); (gdb) bt #0 0x00002b88a35bf285 in BUNinplace (b=0x12458e8, p=0x0, h=<value optimized out>, t=0x1246eb0, force=1 '\001') at /ufs/sjoerd/src/MonetDB/virgin-stable/MonetDB/src/gdk/gdk_bat.mx:1555 #1 0x00002b88a35bfb75 in void_inplace (b=0x12458e8, id=1, val=0x1245a20, force=1 '\001') at /ufs/sjoerd/src/MonetDB/virgin-stable/MonetDB/src/gdk/gdk_bat.mx:1671 #2 0x00002b88a35bfc33 in void_replace_bat (b=0x12458e8, u=0x1246d08, force=<value optimized out>) at /ufs/sjoerd/src/MonetDB/virgin-stable/MonetDB/src/gdk/gdk_bat.mx:1688 #3 0x00002aaab26c9a5a in load_bat (sname=<value optimized out>, tname=<value optimized out>, bname=<value optimized out>, type=<value optimized out>, sz=<value optimized out>, cnt=0x1214400) at /ufs/sjoerd/src/MonetDB/virgin-stable/sql/src/storage/bat/bat_storage.mx:364 #4 0x00002aaab26c9b83 in create_col (tr=<value optimized out>, c=0x1245878) at /ufs/sjoerd/src/MonetDB/virgin-stable/sql/src/storage/bat/bat_storage.mx:456 #5 0x00002aaab26c44a9 in load_table (tr=0xd3dec8, s=0xd3df38, rid=149) at /ufs/sjoerd/src/MonetDB/virgin-stable/sql/src/storage/store.mx:511 #6 0x00002aaab26c5523 in load_trans (tr=0xd3dec8, id=1128) at /ufs/sjoerd/src/MonetDB/virgin-stable/sql/src/storage/store.mx:845 #7 0x00002aaab26c6ff4 in store_init (debug=<value optimized out>, store=<value optimized out>, logdir=<value optimized out>, dbname=<value optimized out>, stk=0) at /ufs/sjoerd/src/MonetDB/virgin-stable/sql/src/storage/store.mx:1318 #8 0x00002aaab26aab79 in mvc_init (debug=0, store=store_bat, stk=0) at /ufs/sjoerd/src/MonetDB/virgin-stable/sql/src/server/sql_mvc.mx:246 #9 0x00002aaab2665c97 in SQLinit (c=<value optimized out>) at /ufs/sjoerd/src/MonetDB/virgin-stable/sql/src/backends/monet5/sql_scenario.mx:225 #10 0x00002b88a2c7d42a in initScenario (c=0x604980, s=0x2b88a2e934d0) at /ufs/sjoerd/src/MonetDB/virgin-stable/MonetDB5/src/mal/mal_scenario.mx:264 #11 0x00002b88a2c58d82 in MSscheduleClient (command=0xb0a1b8 "LIT", challenge=0x41000fd0 "KdhtXMmr29n", fin=0xb10270, fout=0xb03030) at /ufs/sjoerd/src/MonetDB/virgin-stable/MonetDB5/src/mal/mal_session.mx:342 #12 0x00002aaab0e78247 in doChallenge (cmd=<value optimized out>, in=<value optimized out>, out=<value optimized out>) at /ufs/sjoerd/src/MonetDB/virgin-stable/MonetDB5/src/modules/mal/mserver.mx:482 #13 0x00002aaab0e79036 in SERVERlistenThread (Sock=<value optimized out>) at /ufs/sjoerd/src/MonetDB/virgin-stable/MonetDB5/src/modules/mal/mserver.mx:564 #14 0x00002b88a43122a5 in start_thread () from /lib/libpthread.so.0 #15 0x00002b88a4ff261d in clone () from /lib/libc.so.6 #16 0x0000000000000000 in ?? () -bob
A bit of information, did you connect to the server after it has shown you the prompt it is ready to execute a command? During restart of the server it will handle the log file, merging any pending tuples. Given large copy into actions, this may take a few seconds and I am curious if the logon appeared in this period. Bob Ippolito wrote:
So we've been testing out a big ETL and it crashed again, and now every time we start mserver5 it will seemingly start up ok but as soon as mclient connects it will crash. I've generated a core dump.
The db farm is 3.6GB and the core dump is 15MB. I can send either to someone if they need it to look further into the issue. The platform is 2.6.20-15-generic (root@yellow) (gcc version 4.1.2 (Ubuntu 4.1.2-0ubuntu4)) #2 SMP on amd64. It's running an unmodified SR5 superball that we compiled ourselves.
I tried looking at strace and the --debug option with all of the flags on but it didn't produce anything that looked very interesting.
The backtrace is here:
Core was generated by `//mochi/bin/mserver5 --dbname=mochiads_stats --dbinit=include sql; --dbfarm=/da'. Program terminated with signal 11, Segmentation fault. #0 0x00002b88a35bf285 in BUNinplace (b=0x12458e8, p=0x0, h=<value optimized out>, t=0x1246eb0, force=1 '\001') at /ufs/sjoerd/src/MonetDB/virgin-stable/MonetDB/src/gdk/gdk_bat.mx:1555 1555 ATOMreplace(b->ttype, b->theap, BUNtloc(b, p), t); (gdb) bt #0 0x00002b88a35bf285 in BUNinplace (b=0x12458e8, p=0x0, h=<value optimized out>, t=0x1246eb0, force=1 '\001') at /ufs/sjoerd/src/MonetDB/virgin-stable/MonetDB/src/gdk/gdk_bat.mx:1555 #1 0x00002b88a35bfb75 in void_inplace (b=0x12458e8, id=1, val=0x1245a20, force=1 '\001') at /ufs/sjoerd/src/MonetDB/virgin-stable/MonetDB/src/gdk/gdk_bat.mx:1671 #2 0x00002b88a35bfc33 in void_replace_bat (b=0x12458e8, u=0x1246d08, force=<value optimized out>) at /ufs/sjoerd/src/MonetDB/virgin-stable/MonetDB/src/gdk/gdk_bat.mx:1688 #3 0x00002aaab26c9a5a in load_bat (sname=<value optimized out>, tname=<value optimized out>, bname=<value optimized out>, type=<value optimized out>, sz=<value optimized out>, cnt=0x1214400) at /ufs/sjoerd/src/MonetDB/virgin-stable/sql/src/storage/bat/bat_storage.mx:364 #4 0x00002aaab26c9b83 in create_col (tr=<value optimized out>, c=0x1245878) at /ufs/sjoerd/src/MonetDB/virgin-stable/sql/src/storage/bat/bat_storage.mx:456 #5 0x00002aaab26c44a9 in load_table (tr=0xd3dec8, s=0xd3df38, rid=149) at /ufs/sjoerd/src/MonetDB/virgin-stable/sql/src/storage/store.mx:511 #6 0x00002aaab26c5523 in load_trans (tr=0xd3dec8, id=1128) at /ufs/sjoerd/src/MonetDB/virgin-stable/sql/src/storage/store.mx:845 #7 0x00002aaab26c6ff4 in store_init (debug=<value optimized out>, store=<value optimized out>, logdir=<value optimized out>, dbname=<value optimized out>, stk=0) at /ufs/sjoerd/src/MonetDB/virgin-stable/sql/src/storage/store.mx:1318 #8 0x00002aaab26aab79 in mvc_init (debug=0, store=store_bat, stk=0) at /ufs/sjoerd/src/MonetDB/virgin-stable/sql/src/server/sql_mvc.mx:246 #9 0x00002aaab2665c97 in SQLinit (c=<value optimized out>) at /ufs/sjoerd/src/MonetDB/virgin-stable/sql/src/backends/monet5/sql_scenario.mx:225 #10 0x00002b88a2c7d42a in initScenario (c=0x604980, s=0x2b88a2e934d0) at /ufs/sjoerd/src/MonetDB/virgin-stable/MonetDB5/src/mal/mal_scenario.mx:264 #11 0x00002b88a2c58d82 in MSscheduleClient (command=0xb0a1b8 "LIT", challenge=0x41000fd0 "KdhtXMmr29n", fin=0xb10270, fout=0xb03030) at /ufs/sjoerd/src/MonetDB/virgin-stable/MonetDB5/src/mal/mal_session.mx:342 #12 0x00002aaab0e78247 in doChallenge (cmd=<value optimized out>, in=<value optimized out>, out=<value optimized out>) at /ufs/sjoerd/src/MonetDB/virgin-stable/MonetDB5/src/modules/mal/mserver.mx:482 #13 0x00002aaab0e79036 in SERVERlistenThread (Sock=<value optimized out>) at /ufs/sjoerd/src/MonetDB/virgin-stable/MonetDB5/src/modules/mal/mserver.mx:564 #14 0x00002b88a43122a5 in start_thread () from /lib/libpthread.so.0 #15 0x00002b88a4ff261d in clone () from /lib/libc.so.6 #16 0x0000000000000000 in ?? ()
-bob
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Yes, we did connect to the server after it had shown the prompt. Every
time we did it would crash.
mserver5 had crashed previously during ETL and it was recoverable, but
after this particular crash it would come up and present the prompt
but any mclient would cause mserver5 to die immediately (before any
SQL or anything).
On Jan 21, 2008 11:32 PM, Martin Kersten
A bit of information, did you connect to the server after it has shown you the prompt it is ready to execute a command?
During restart of the server it will handle the log file, merging any pending tuples. Given large copy into actions, this may take a few seconds and I am curious if the logon appeared in this period.
Bob Ippolito wrote:
So we've been testing out a big ETL and it crashed again, and now every time we start mserver5 it will seemingly start up ok but as soon as mclient connects it will crash. I've generated a core dump.
The db farm is 3.6GB and the core dump is 15MB. I can send either to someone if they need it to look further into the issue. The platform is 2.6.20-15-generic (root@yellow) (gcc version 4.1.2 (Ubuntu 4.1.2-0ubuntu4)) #2 SMP on amd64. It's running an unmodified SR5 superball that we compiled ourselves.
I tried looking at strace and the --debug option with all of the flags on but it didn't produce anything that looked very interesting.
The backtrace is here:
Core was generated by `//mochi/bin/mserver5 --dbname=mochiads_stats --dbinit=include sql; --dbfarm=/da'. Program terminated with signal 11, Segmentation fault. #0 0x00002b88a35bf285 in BUNinplace (b=0x12458e8, p=0x0, h=<value optimized out>, t=0x1246eb0, force=1 '\001') at /ufs/sjoerd/src/MonetDB/virgin-stable/MonetDB/src/gdk/gdk_bat.mx:1555 1555 ATOMreplace(b->ttype, b->theap, BUNtloc(b, p), t); (gdb) bt #0 0x00002b88a35bf285 in BUNinplace (b=0x12458e8, p=0x0, h=<value optimized out>, t=0x1246eb0, force=1 '\001') at /ufs/sjoerd/src/MonetDB/virgin-stable/MonetDB/src/gdk/gdk_bat.mx:1555 #1 0x00002b88a35bfb75 in void_inplace (b=0x12458e8, id=1, val=0x1245a20, force=1 '\001') at /ufs/sjoerd/src/MonetDB/virgin-stable/MonetDB/src/gdk/gdk_bat.mx:1671 #2 0x00002b88a35bfc33 in void_replace_bat (b=0x12458e8, u=0x1246d08, force=<value optimized out>) at /ufs/sjoerd/src/MonetDB/virgin-stable/MonetDB/src/gdk/gdk_bat.mx:1688 #3 0x00002aaab26c9a5a in load_bat (sname=<value optimized out>, tname=<value optimized out>, bname=<value optimized out>, type=<value optimized out>, sz=<value optimized out>, cnt=0x1214400) at /ufs/sjoerd/src/MonetDB/virgin-stable/sql/src/storage/bat/bat_storage.mx:364 #4 0x00002aaab26c9b83 in create_col (tr=<value optimized out>, c=0x1245878) at /ufs/sjoerd/src/MonetDB/virgin-stable/sql/src/storage/bat/bat_storage.mx:456 #5 0x00002aaab26c44a9 in load_table (tr=0xd3dec8, s=0xd3df38, rid=149) at /ufs/sjoerd/src/MonetDB/virgin-stable/sql/src/storage/store.mx:511 #6 0x00002aaab26c5523 in load_trans (tr=0xd3dec8, id=1128) at /ufs/sjoerd/src/MonetDB/virgin-stable/sql/src/storage/store.mx:845 #7 0x00002aaab26c6ff4 in store_init (debug=<value optimized out>, store=<value optimized out>, logdir=<value optimized out>, dbname=<value optimized out>, stk=0) at /ufs/sjoerd/src/MonetDB/virgin-stable/sql/src/storage/store.mx:1318 #8 0x00002aaab26aab79 in mvc_init (debug=0, store=store_bat, stk=0) at /ufs/sjoerd/src/MonetDB/virgin-stable/sql/src/server/sql_mvc.mx:246 #9 0x00002aaab2665c97 in SQLinit (c=<value optimized out>) at /ufs/sjoerd/src/MonetDB/virgin-stable/sql/src/backends/monet5/sql_scenario.mx:225 #10 0x00002b88a2c7d42a in initScenario (c=0x604980, s=0x2b88a2e934d0) at /ufs/sjoerd/src/MonetDB/virgin-stable/MonetDB5/src/mal/mal_scenario.mx:264 #11 0x00002b88a2c58d82 in MSscheduleClient (command=0xb0a1b8 "LIT", challenge=0x41000fd0 "KdhtXMmr29n", fin=0xb10270, fout=0xb03030) at /ufs/sjoerd/src/MonetDB/virgin-stable/MonetDB5/src/mal/mal_session.mx:342 #12 0x00002aaab0e78247 in doChallenge (cmd=<value optimized out>, in=<value optimized out>, out=<value optimized out>) at /ufs/sjoerd/src/MonetDB/virgin-stable/MonetDB5/src/modules/mal/mserver.mx:482 #13 0x00002aaab0e79036 in SERVERlistenThread (Sock=<value optimized out>) at /ufs/sjoerd/src/MonetDB/virgin-stable/MonetDB5/src/modules/mal/mserver.mx:564 #14 0x00002b88a43122a5 in start_thread () from /lib/libpthread.so.0 #15 0x00002b88a4ff261d in clone () from /lib/libc.so.6 #16 0x0000000000000000 in ?? ()
-bob
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participants (2)
-
Bob Ippolito -
Martin Kersten