-u${user} -p${passwd} -h${host} --database ${_db} \
        --allow-keywords --comments --add-drop-table=FALSE \
        --flush-logs ${master_opt} ${tables_opt} --routines --triggers --no-data \
        > ${working_dir}/${_db}-struct-dump.sql 2>${working_dir}/${_db}-struct-dump-error.log

Thread pointer: 0x0x7f2911ed90f8
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...
stack_bottom = 0x7f2d704f0e50 thread_stack 0x40000
(my_addr_resolve failure: fork)
/usr/local/mysql/bin/mysqld(my_print_stacktrace+0x2e) [0xb8f29e]
/usr/local/mysql/bin/mysqld(handle_fatal_signal+0x422) [0x708952]
/lib/libpthread.so.0(+0xeff0) [0x7f2e9793bff0]
/usr/local/mysql/bin/mysqld() [0x516bb5]
/usr/local/mysql/bin/mysqld(my_net_read+0x17b) [0x516e4b]
/usr/local/mysql/bin/mysqld(cli_safe_read+0x26) [0x6e05e6]
/usr/local/mysql/bin/mysqld() [0x6e23c4]
/usr/local/mysql/bin/mysqld(mysql_real_query+0x4a) [0x6de6ba]
/usr/local/mysql/lib/plugin/ha_spider.so(spider_mysql_handler::show_index(int, int)+0x7fa) [0x7f292d31d8fa]
/usr/local/mysql/lib/plugin/ha_spider.so(spider_get_crd(st_spider_share*, int, long, ha_spider*, TABLE*, double, int, int, int)+0x447) [0x7f292d2dc157]
/usr/local/mysql/lib/plugin/ha_spider.so(ha_spider::check_crd()+0x37d) [0x7f292d2fb37d]
/usr/local/mysql/lib/plugin/ha_spider.so(ha_spider::info(unsigned int)+0x509) [0x7f292d2fc889]
/usr/local/mysql/bin/mysqld(handler::get_dynamic_partition_info(PARTITION_STATS*, unsigned int)+0x1b) [0x708f8b]
/usr/local/mysql/bin/mysqld() [0x5f021b]
/usr/local/mysql/bin/mysqld() [0x5fc526]
/usr/local/mysql/bin/mysqld() [0x5f485c]
/usr/local/mysql/bin/mysqld(get_all_tables(THD*, TABLE_LIST*, Item*)+0xa55) [0x5f90a5]
/usr/local/mysql/bin/mysqld(get_schema_tables_result(JOIN*, enum_schema_table_state)+0x296) [0x5ef666]
/usr/local/mysql/bin/mysqld(JOIN::exec_inner()+0x84e) [0x5ea49e]
/usr/local/mysql/bin/mysqld(mysql_select(THD*, Item***, TABLE_LIST*, unsigned int, List<Item>&, Item*, unsigned int, st_order*, st_order*, Item*, st_order*, unsigned long long, select_result*, st_select_lex_unit*, st_select_lex*)+0x20c) [0x5eccbc]
/usr/local/mysql/bin/mysqld(handle_select(THD*, LEX*, select_result*, unsigned long)+0x28a) [0x5ed90a]
/usr/local/mysql/bin/mysqld() [0x593368]
/usr/local/mysql/bin/mysqld(mysql_execute_command(THD*)+0x926) [0x5961b6]
/usr/local/mysql/bin/mysqld(mysql_parse(THD*, char*, unsigned int, Parser_state*)+0x259) [0x59d189]
/usr/local/mysql/bin/mysqld(dispatch_command(enum_server_command, THD*, char*, unsigned int)+0x192c) [0x59f0ac]
/usr/local/mysql/bin/mysqld(do_command(THD*)+0xed) [0x59f84d]
/usr/local/mysql/bin/mysqld(do_handle_one_connection(THD*)+0x164) [0x665494]
/usr/local/mysql/bin/mysqld(handle_one_connection+0x42) [0x6655d2]
/usr/local/mysql/bin/mysqld() [0xafa9ab]
/lib/libpthread.so.0(+0x68ca) [0x7f2e979338ca]
/lib/libc.so.6(clone+0x6d) [0x7f2e968c0b6d]