说明
该内容适用于 OceanBase 数据库 V2.x 和 V3.x 版本。
获取 crash 堆栈信息，类似如下内容：
CRASH ERROR!!! sig=11, sig_code=2, sig_addr=7ff5000eaff8, timestamp=1664366994522192, tid=3441460, tname=TNT_L0_1002, trace_id=1237827481****-166138027986****, extra_info=((null)), lbt=0xa13ecfb 0xa13a737 0x7ff884d2a5cf 0x9502e0b 0x958ff33 0x95847aa 0x95847fc 0x95847fc 0x95847fc 0x95847fc 0x95847fc 0x95847fc 0x95847fc 0x95847fc 0x95847fc 0x95847fc 0x95847fc 0x95847fc 0x95847fc 0x95847fc 0x95847fc 0x95847fc 0x95847fc 0x95847fc这段信息是一个程序崩溃时的堆栈信息，其中包含了以下内容：
- sig=11：程序崩溃时捕获到的信号编号，这里是11，通常表示访问了非法的内存地址。
- sig_code=2：信号的错误代码，这里是2，具体含义需要结合信号编号来解释。
- sig_addr=7ff5000eaff8：信号发生的地址，这里是一个十六进制的地址。
- timestamp=1664366994522192：崩溃发生的时间戳。
- tid=3441460：崩溃时所在的线程 ID。
- tname=TNT_L0_1002：线程的名称。
- trace_id=12378274812623-1661380279865382：崩溃发生时的追踪 ID。
- extra_info=((null))：额外的信息，在这里是空的。
- lbt=...：堆栈信息，列出了多个内存地址，通常是调用栈的信息，可以用来分析程序崩溃时的调用链。
观察最后的几个栈地址，当最后几个栈地址重复度非常高时，大概率是递归函数导致的爆栈，类似如下内容：
[root@ob12 log]# addr2line -pCfe /home/admin/oceanbase/bin/observer 0xa13ecfb 0xa13a737 0x7ff884d2a5cf 0x9502e0b 0x958ff33 0x95847aa 0x95847fc 0x95847fc 0x95847fc 0x95847fc 0x95847fc 0x95847fc 0x95847fc 0x95847fc 0x95847fc 0x95847fc 0x95847fc 0x95847fc 0x95847fc 0x95847fc 0x95847fc 0x95847fc 0x95847fc 0x95847fc safe_backtrace at ??:? oceanbase::common::coredump_cb(int, siginfo_t*) at ??:? ?? ??:0 oceanbase::sql::ObDMLStmt::get_child_stmts(oceanbase::common::ObIArray<oceanbase::sql::ObSelectStmt*>&) const at ??:? oceanbase::sql::ObSelectStmt::get_child_stmts(oceanbase::common::ObIArray<oceanbase::sql::ObSelectStmt*>&) const at ??:? oceanbase::sql::ObSelectStmt::check_table_be_modified(unsigned long) const at ??:? oceanbase::sql::ObSelectStmt::check_table_be_modified(unsigned long) const at ??:? oceanbase::sql::ObSelectStmt::check_table_be_modified(unsigned long) const at ??:? oceanbase::sql::ObSelectStmt::check_table_be_modified(unsigned long) const at ??:? oceanbase::sql::ObSelectStmt::check_table_be_modified(unsigned long) const at ??:? oceanbase::sql::ObSelectStmt::check_table_be_modified(unsigned long) const at ??:? oceanbase::sql::ObSelectStmt::check_table_be_modified(unsigned long) const at ??:? oceanbase::sql::ObSelectStmt::check_table_be_modified(unsigned long) const at ??:? oceanbase::sql::ObSelectStmt::check_table_be_modified(unsigned long) const at ??:? oceanbase::sql::ObSelectStmt::check_table_be_modified(unsigned long) const at ??:? oceanbase::sql::ObSelectStmt::check_table_be_modified(unsigned long) const at ??:? oceanbase::sql::ObSelectStmt::check_table_be_modified(unsigned long) const at ??:? oceanbase::sql::ObSelectStmt::check_table_be_modified(unsigned long) const at ??:? oceanbase::sql::ObSelectStmt::check_table_be_modified(unsigned long) const at ??:? oceanbase::sql::ObSelectStmt::check_table_be_modified(unsigned long) const at ??:? oceanbase::sql::ObSelectStmt::check_table_be_modified(unsigned long) const at ??:? oceanbase::sql::ObSelectStmt::check_table_be_modified(unsigned long) const at ??:? oceanbase::sql::ObSelectStmt::check_table_be_modified(unsigned long) const at ??:? oceanbase::sql::ObSelectStmt::check_table_be_modified(unsigned long) const at ??:? [root@ob12 log]#
