>Description: Maybe that I abuse the API. Nevertheless, the server should not crash. I tried with a self-compiled kernel, from the 5.0 bitkeeper repository and with the pre-compiled version mysql-standard-5.0.0-alpha-pc-linux-i686.
The message is: mysqld got signal 11; This could be because you hit a bug. It is also possible that this binary or one of the libraries it was linked against is corrupt, improperly built, or misconfigured. This error can also be caused by malfunctioning hardware. We will try our best to scrape up some info that will hopefully help diagnose the problem, but since we have already crashed, something is definitely wrong and this may fail. key_buffer_size=8388600 read_buffer_size=131072 max_used_connections=0 max_connections=100 threads_connected=0 It is possible that mysqld could use up to key_buffer_size + (read_buffer_size + sort_buffer_size)*max_connections = 225791 K bytes of memory Hope that's ok; if not, decrease some variables in the equation. thd=0x863fc18 Attempting backtrace. You can use the following information to find out where mysqld died. If you see no messages after this, something went terribly wrong... Cannot determine thread, fp=0xbfe7f598, backtrace may not be correct. Stack range sanity check OK, backtrace follows: 0x80880d3 0x82df1d8 0x82dd68b 0x8307dda 0x82bc8b6 0x82bce99 0x808179d 0x807eaf9 0x8087cf8 0x8093c22 0x82dc98c 0x83124ca New value of fp=(nil) failed sanity check, terminating stack trace! Please read http://www.mysql.com/doc/en/Using_stack_trace.html and follow instructions on how to resolve the stack trace. Resolved stack trace is much more helpful in diagnosing the problem, so please do resolve it Trying to get some variables. Some pointers may be invalid and cause the dump to abort... thd->query at (nil) is invalid pointer thd->thread_id=1 The manual page at http://www.mysql.com/doc/en/Crashing.html contains information that should help you find out what is causing the crash. My own kernel does not produce a useful backtrace, but the standard kernel does: 0x80880d3 handle_segfault + 423 0x82df1d8 pthread_sighandler + 184 0x82dd68b pthread_mutex_lock + 11 0x8307dda free + 122 0x82bc8b6 my_no_flags_free + 22 0x82bce99 free_root + 149 0x808179d _._9Statement + 37 0x807eaf9 _._3THD + 517 0x8087cf8 end_thread__FP3THDb + 64 0x8093c22 handle_one_connection + 914 0x82dc98c pthread_start_thread + 220 0x83124ca thread_start + 4 >How-To-Repeat: Here is the test program. Call it as "bug_prepared -q" for using mysql_query only (wich succeeds) or "bug_prepared -p" for using mysql_prepare/mysql_execute. The program needs a database "test_7". It creates a table "tab2", inserts a row, selects it back, sleeps 5 seconds to prove that the crash comes during closing the session, closes and exits. /* bug_prepared.c * * Copyright 2004 Ingo Struewing * * Show a server bug during close after executing prepared SQL. */ static char *USAGE[] = { "Usage: bug_prepared -p|-q \n", 0}; #define ARGS(x) ( ((x) == 1) ) #include <my_global.h> #include <my_sys.h> #include <m_string.h> #include <mysql.h> #include <mysqld_error.h> char *program ; MYSQL mysql_structure ; MYSQL *mysql = &mysql_structure ; void check_error ( char *message , unsigned int acceptable_1 , unsigned int acceptable_2 , unsigned int acceptable_3 ); /*==========================================================================*/ int main ( int argc , char **argv ) { int argn ; int use_prepared ; char *host ; char *user ; char *passwd ; char *db ; unsigned int port ; char *unix_socket ; unsigned long client_flag ; char *query ; MYSQL_STMT *stmt ; MYSQL_BIND bind[4] ; long int producer ; unsigned long amount_length ; unsigned long size_length ; unsigned long fruit_length ; MYSQL_RES *result_set ; MYSQL_ROW row ; /* * Get options. */ argn = 1 ; if ( ! ARGS(argc - argn) ) { for ( argn = 0 ; USAGE[argn] ; argn ++ ) (void) fprintf ( stderr , "%s" , USAGE[argn] ); return ( 1 ); } if ( ! strcmp ( argv[argn] , "-p" ) ) { use_prepared = 1 ; } else if ( ! strcmp ( argv[argn] , "-q" ) ) { use_prepared = 0 ; } else { for ( argn = 0 ; USAGE[argn] ; argn ++ ) (void) fprintf ( stderr , "%s" , USAGE[argn] ); return ( 1 ); } /* * Get program name. */ program = strrchr ( argv[0] , '/' ); if ( program ) program ++ ; else program = argv[0]; /* * Set connection values. */ host = NULL ; user = NULL ; passwd = NULL ; db = "test_7" ; port = 0 ; unix_socket = NULL ; client_flag = 0 ; /* * Initialize the mysql structure. */ if ( ! mysql_init ( mysql ) ) { fprintf ( stderr , "cannot create mysql structure \n" ); return ( 3 ); } /* * Get default options. */ mysql_options ( mysql , MYSQL_READ_DEFAULT_GROUP , program ); check_error ( "mysql_options" , 0 , 0 , 0 ); /* * Connect to the server. */ mysql_real_connect ( mysql , host , user , passwd , db , port , unix_socket , client_flag ); check_error ( "mysql_real_connect" , 0 , 0 , 0 ); printf ( "connected \n" ); /* * Drop a table which may exist from former tries. */ mysql_query ( mysql , "drop table bug_prepared" ); check_error ( "mysql_query drop database" , ER_BAD_TABLE_ERROR , 0 , 0 ); printf ( "dropped table \n" ); /* * Create a new table. */ mysql_query ( mysql , "create table bug_prepared ( " "producer fixed(10), " "amount char(10), " "size char(10), " "fruit char(20) )" ); check_error ( "mysql_query create table" , 0 , 0 , 0 ); printf ( "created table \n" ); if ( use_prepared ) { /* * Prepare SQL statement. */ query = "insert bug_prepared values (?,?,?,?)" ; stmt = mysql_prepare ( mysql , query , strlen(query) ); check_error ( "mysql_prepare insert" , 0 , 0 , 0 ); /* * Validate parameter count. */ if ( mysql_param_count ( stmt ) != 4 ) { fprintf ( stderr , "invalid parameter count returned by MySQL \n" ); exit ( 4 ); } /* * Setup parameter bindings. * The first is a number type, * so there is no need to specify buffer_length */ bind[0].buffer_type = MYSQL_TYPE_LONG; bind[0].is_null = FALSE ; bind[0].buffer = (void*) &producer ; producer = 1 ; bind[0].length = 0 ; bind[1].buffer_type = MYSQL_TYPE_STRING; bind[1].is_null = FALSE ; bind[1].buffer = "five" ; amount_length = 4 ; bind[1].buffer_length = amount_length ; bind[1].length = &amount_length ; bind[2].buffer_type = MYSQL_TYPE_STRING; bind[2].is_null = FALSE ; bind[2].buffer = "big" ; size_length = 3 ; bind[2].buffer_length = size_length ; bind[2].length = &size_length ; bind[3].buffer_type = MYSQL_TYPE_STRING; bind[3].is_null = FALSE ; bind[3].buffer = "apple" ; fruit_length = 5 ; bind[3].buffer_length = fruit_length ; bind[3].length = &fruit_length ; mysql_bind_param ( stmt , bind ); check_error ( "mysql_bind_param" , 0 , 0 , 0 ); printf("%lu %lu '%s' %lu %lu '%s' %lu %lu '%s' \n", *bind[1].length, bind[1].buffer_length, bind[1].buffer, *bind[2].length, bind[2].buffer_length, bind[2].buffer, *bind[3].length, bind[3].buffer_length, bind[3].buffer ); /* * Execute the prepared statement */ mysql_execute ( stmt ); check_error ( "mysql_execute insert" , 0 , 0 , 0 ); /* * Free the statement resources */ mysql_stmt_close ( stmt ); check_error ( "mysql_stmt_close" , 0 , 0 , 0 ); } else { mysql_query ( mysql , "insert bug_prepared values (1,'five','big','apple')" ); check_error ( "mysql_query insert" , 0 , 0 , 0 ); } /* * Select back what we have inserted. */ mysql_query ( mysql , "select * from bug_prepared" ); check_error ( "mysql_query select" , 0 , 0 , 0 ); /* * Fetch the whole result set. */ result_set = mysql_store_result ( mysql ); check_error ( "mysql_query fetch result set" , 0 , 0 , 0 ); /* * Fetch and print each row. */ for (;;) { row = mysql_fetch_row ( result_set ); check_error ( "mysql_query fetch row" , 0 , 0 , 0 ); if ( ! row ) { printf ( "no more rows \n" ); break ; } printf ( "selected %10s %10s %10s %10s \n", row[0] ? row[0] : "(NULL)" , row[1] ? row[1] : "(NULL)" , row[2] ? row[2] : "(NULL)" , row[3] ? row[3] : "(NULL)" ); } /* * Free the result set. */ mysql_free_result ( result_set ); /* * Wait a moment to prove that the server crashes at close. */ printf ( "sleeping before closing... \n" ); sleep ( 5 ); /* see when the server crashes */ printf ( "awoke from sleep. closing now... \n" ); /* * Close connection. */ mysql_close ( mysql ); printf ( "closed \n" ); /* * Terminate program. */ return ( 0 ); } /*==========================================================================*/ void check_error ( char *message , unsigned int acceptable_1 , unsigned int acceptable_2 , unsigned int acceptable_3 ) { unsigned int errnum ; errnum = mysql_errno ( mysql ); if ( (errnum == 0) || (errnum == acceptable_1) || (errnum == acceptable_2) || (errnum == acceptable_3) ) { return ; } fprintf ( stderr , "%s: %s: %d, %s \n", program , message , errnum , mysql_error(mysql) ); mysql_close ( mysql ); exit ( 2 ); } >Fix: Besides getting the server crash fixed, I would like to hear, how to change my program to avoid the crash. >Submitter-Id: <submitter ID> >Originator: MySQL Development >Organization: private >MySQL support: none >Synopsis: mysqld crashes when closing a prepare/execute session >Severity: serious >Priority: medium >Category: mysql >Class: sw-bug >Release: mysql-5.0.0-alpha (Source distribution) >C compiler: gcc (GCC) 3.3.3 20031206 (prerelease) (Debian) >C++ compiler: gcc (GCC) 3.3.3 20031206 (prerelease) (Debian) >Environment: PC, Debian GNU/Linux (sid), Pentium 4 libc6 2.3.2.ds1-10 zlib1g 1.2.1-3 System: Linux chilla 2.6.0-test11 #1 Sun Jan 4 17:04:51 CET 2004 i686 GNU/Linux Architecture: i686 Some paths: /usr/bin/perl /usr/bin/make /usr/bin/gcc /usr/bin/cc GCC: Reading specs from /usr/lib/gcc-lib/i486-linux/3.3.3/specs Konfiguriert mit: ../src/configure -v --enable-languages=c,c++,java,f77,pascal,objc,ada,treelang --prefix=/usr --mandir=/usr/share/man --infodir=/usr/share/info --with-gxx-include-dir=/usr/include/c++/3.3 --enable-shared --with-system-zlib --enable-nls --without-included-gettext --enable-__cxa_atexit --enable-clocale=gnu --enable-debug --enable-java-gc=boehm --enable-java-awt=xlib --enable-objc-gc i486-linux Thread model: posix gcc-Version 3.3.3 20031229 (prerelease) (Debian) Compilation info: CC='gcc' CFLAGS='-g -march=pentium4' CXX='gcc' CXXFLAGS='-g -march=pentium4 -felide-constructors -fno-exceptions -fno-rtti' LDFLAGS='' ASFLAGS='' LIBC: lrwxrwxrwx 1 root root 13 2003-11-15 12:44 /lib/libc.so.6 -> libc-2.3.2.so -rw-r--r-- 1 root root 1243076 2003-11-05 20:17 /lib/libc-2.3.2.so -rw-r--r-- 1 root root 2537670 2003-11-05 20:18 /usr/lib/libc.a -rw-r--r-- 1 root root 204 2003-11-05 20:07 /usr/lib/libc.so Configure command: ./configure '--prefix=/usr/local/mysql' '--with-unix-socket-path=/usr/local/mysql/tmp/mysql.sock' '--with-debug' 'CFLAGS=-g -march=pentium4' 'CXXFLAGS=-g -march=pentium4 -felide-constructors -fno-exceptions -fno-rtti' 'CXX=gcc' -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe: http://lists.mysql.com/[EMAIL PROTECTED]