Crash / assertion failed - in drizzled::Diagnostics_area::set_eof_status (this=0x7f9f3c2c4258, session=0x7f9f3c2c3b10) at drizzled/diagnostics_area.cc:120

[Patrick Crews]

Assertion failed:
Crash occurred in a two-connection scenario. Still working to be able to create this regularly, documenting with as much information as available to facilitate further research.

Connection1: data_dictionary queries against all D_D tables, including SHOW commands

Connection2: Drizzledump + restore randgen testing - creating schemas and tables, altering tables, dumping and restoring said tables and doing table-table comparisons

Last queries:
Conn1:
SELECT TABLES . TABLE_COMMENT FROM tables , columns WHERE tables. table_name = columns . table_name

Conn2:
# 2010-09-02T10:57:11 Running Query--> SELECT 1
# 2010-09-02T10:57:11 drizzledump file is: /tmp//dump_6020_9306.sql
# 2010-09-02T10:57:11 Running Query--> DROP DATABASE IF EXISTS drizzledump_db
# 2010-09-02T10:57:11 Running Query--> DROP DATABASE IF EXISTS drizzledump_db_restore
# 2010-09-02T10:57:11 Running Query--> CREATE DATABASE drizzledump_db

Backtrace:
#0 0x00007f9f558d5a75 in *__GI_raise (sig=<value optimized out>) at ../nptl/sysdeps/unix/sysv/linux/raise.c:64
#1 0x00007f9f558d95c0 in *__GI_abort () at abort.c:92
#2 0x00007f9f558ce941 in *__GI___assert_fail (assertion=0xa61bba "! is_set()", file=<value optimized out>, line=120,
    function=0xa61d80 "void drizzled::Diagnostics_area::set_eof_status(drizzled::Session*)") at assert.c:81
#3 0x000000000061f0c9 in drizzled::Diagnostics_area::set_eof_status (this=0x7f9f3c2c4258, session=0x7f9f3c2c3b10) at drizzled/diagnostics_area.cc:120
#4 0x0000000000796432 in drizzled::Session::my_eof (this=0x7f9f3c2c3b10) at ./drizzled/session.h:1393
#5 0x00000000007bd8aa in drizzled::select_send::send_eof (this=0x2c5bf88) at ./drizzled/select_send.h:55
#6 0x00000000007c5601 in drizzled::do_select (join=0x2c5bfa8, fields=0x7f9f3c2c4880, table=0x0) at drizzled/sql_select.cc:3355
#7 0x00000000006f37d7 in drizzled::Join::exec (this=0x2c5bfa8) at drizzled/join.cc:1695
#8 0x00000000007be7cd in drizzled::mysql_select (session=0x7f9f3c2c3b10, rref_pointer_array=0x7f9f3c2c4940, tables=0x2c5b8d0, wild_num=0, fields=..., conds=0x2c5bd78,
    og_num=0, order=0x0, group=0x0, having=0x0, select_options=2147500032, result=0x2c5bf88, unit=0x7f9f3c2c4588, select_lex=0x7f9f3c2c4788)
    at drizzled/sql_select.cc:427
#9 0x00000000007be081 in drizzled::handle_select (session=0x7f9f3c2c3b10, lex=0x7f9f3c2c4568, result=0x2c5bf88, setup_tables_done_option=0)
    at drizzled/sql_select.cc:146
#10 0x00000000007ba68b in drizzled::execute_sqlcom_select (session=0x7f9f3c2c3b10, all_tables=0x2c5b8d0) at drizzled/sql_parse.cc:544
#11 0x0000000000813ecb in drizzled::statement::Select::execute (this=0x2ea0c00) at drizzled/statement/select.cc:32
#12 0x00000000007ba216 in mysql_execute_command (session=0x7f9f3c2c3b10) at drizzled/sql_parse.cc:479
#13 0x00000000007bafd8 in drizzled::mysql_parse (session=0x7f9f3c2c3b10,
    inBuf=0x2c6ba88 "SELECT TABLES . TABLE_COMMENT FROM tables , columns WHERE tables. table_name = columns . table_name", length=99) at drizzled/sql_parse.cc:750
#14 0x00000000007b9b6a in drizzled::dispatch_command (command=drizzled::COM_QUERY, session=0x7f9f3c2c3b10, packet=0x7f9f3c2b47d1 "", packet_length=100)
    at drizzled/sql_parse.cc:224
#15 0x000000000077d2f3 in drizzled::Session::executeStatement (this=0x7f9f3c2c3b10) at drizzled/session.cc:666
#16 0x000000000077cb9f in drizzled::Session::run (this=0x7f9f3c2c3b10) at drizzled/session.cc:522
#17 0x00007f9f51f1db54 in MultiThreadScheduler::runSession (this=0x7f9f3c27cf10, session=0x7f9f3c2c3b10) at ./plugin/multi_thread/multi_thread.h:67
#18 0x00007f9f51f1b9e2 in session_thread (arg=0x7f9f3c2c3b10) at plugin/multi_thread/multi_thread.cc:52
#19 0x00007f9f55c2b9ca in start_thread (arg=<value optimized out>) at pthread_create.c:300
#20 0x00007f9f559886fd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#21 0x0000000000000000 in ?? ()

[Patrick Crews (patrick-crews)]

Closing this out. Repeated tests with multiple data_dictionary threads hitting the tables during drizzledump testing were fine.

Suspect Andrews' fixes for other bugs with concurrency have corrected this crash.