今天，在工作中，我的计算机随机冻结/崩溃。重启后，MAMP拒绝启动mysql，我不知道为什么。肯定没有其他的mysql进程正在运行。我已经检查了几次。因此，killall -9 mysqld不是解决方案。我实际上也已经完全重新安装了MAMP。

这似乎是我的MySQL日志的重要组成部分，但是我对这些东西的阅读不是很熟练，所以也许答案就在我眼前。

140527 15:06:58 mysqld_safe Starting mysqld daemon with databases from /Library/Application Support/appsolute/MAMP PRO/db/mysql
140527 15:06:58 [Warning] Using unique option prefix key_buffer instead of key_buffer_size is deprecated and will be removed in a future release. Please use the full name instead.
140527 15:06:58 [Warning] Setting lower_case_table_names=2 because file system for /Library/Application Support/appsolute/MAMP PRO/db/mysql/ is case insensitive
140527 15:06:58 [Note] Plugin 'FEDERATED' is disabled.
140527 15:06:58 InnoDB: The InnoDB memory heap is disabled
140527 15:06:58 InnoDB: Mutexes and rw_locks use GCC atomic builtins
140527 15:06:58 InnoDB: Compressed tables use zlib 1.2.3
140527 15:06:58 InnoDB: Initializing buffer pool, size = 128.0M
140527 15:06:58 InnoDB: Completed initialization of buffer pool
140527 15:06:58 InnoDB: highest supported file format is Barracuda.
InnoDB: Log scan progressed past the checkpoint lsn 791075520
140527 15:06:58  InnoDB: Database was not shut down normally!
InnoDB: Starting crash recovery.
InnoDB: Reading tablespace information from the .ibd files...
InnoDB: Restoring possible half-written data pages from the doublewrite
InnoDB: buffer...
InnoDB: Doing recovery: scanned up to log sequence number 791076717
InnoDB: Database page corruption on disk or a failed
InnoDB: file read of page 8402.
InnoDB: You may have to recover from a backup.
140527 15:06:58  InnoDB: Page dump in ascii and hex (16384 bytes):
 len 16384; hex ....
InnoDB: End of page dump
140527 15:06:58  InnoDB: Page checksum 3802906200, prior-to-4.0.14-form checksum 786607151
InnoDB: stored checksum 3802906200, prior-to-4.0.14-form stored checksum 1787456768
InnoDB: Page lsn 0 791046088, low 4 bytes of lsn at page end 790720183
InnoDB: Page number (if stored to page already) 8402,
InnoDB: space id (if created with >= MySQL-4.1.1 and stored already) 0
InnoDB: Page may be an insert undo log page
InnoDB: Database page corruption on disk or a failed
InnoDB: file read of page 8402.
InnoDB: You may have to recover from a backup.
InnoDB: It is also possible that your operating
InnoDB: system has corrupted its own file cache
InnoDB: and rebooting your computer removes the
InnoDB: error.
InnoDB: If the corrupt page is an index page
InnoDB: you can also try to fix the corruption
InnoDB: by dumping, dropping, and reimporting
InnoDB: the corrupt table. You can use CHECK
InnoDB: TABLE to scan your table for corruption.
InnoDB: See also http://dev.mysql.com/doc/refman/5.5/en/forcing-innodb-recovery.html
InnoDB: about forcing recovery.
InnoDB: Ending processing because of a corrupt database page.
140527 15:06:58  InnoDB: Assertion failure in thread 140735261836048 in file buf0buf.c line 3619
InnoDB: We intentionally generate a memory trap.
InnoDB: Submit a detailed bug report to http://bugs.mysql.com.
InnoDB: If you get repeated assertion failures or crashes, even
InnoDB: immediately after the mysqld startup, there may be
InnoDB: corruption in the InnoDB tablespace. Please refer to
InnoDB: http://dev.mysql.com/doc/refman/5.5/en/forcing-innodb-recovery.html
InnoDB: about forcing recovery.
19:06:58 UTC - mysqld got signal 6 ;
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=16777216
read_buffer_size=262144
max_used_connections=0
max_threads=151
thread_count=0
connection_count=0
It is possible that mysqld could use up to 
key_buffer_size + (read_buffer_size + sort_buffer_size)*max_threads = 134084 K  bytes of memory
Hope that's ok; if not, decrease some variables in the equation.

Thread pointer: 0x0
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 = 0 thread_stack 0x40000
0   mysqld                              0x000000010028081c my_print_stacktrace + 44
1   mysqld                              0x0000000100021624 handle_fatal_signal + 692
2   libsystem_platform.dylib            0x00007fff91e625aa _sigtramp + 26
3   ???                                 0x0000000000000000 0x0 + 0
4   libsystem_c.dylib                   0x00007fff9355bb1a abort + 125
5   mysqld                              0x00000001002b30af buf_page_io_complete + 959
6   mysqld                              0x00000001002b9892 buf_read_page_low + 610
7   mysqld                              0x00000001002b9fa5 buf_read_page + 85
8   mysqld                              0x00000001002b4431 buf_page_get_gen + 673
9   mysqld                              0x000000010034fdd5 trx_undo_lists_init + 373
10  mysqld                              0x0000000100348e2e trx_rseg_mem_create + 334
11  mysqld                              0x0000000100348fed trx_rseg_list_and_array_init + 157
12  mysqld                              0x000000010034a147 trx_sys_init_at_db_start + 215
13  mysqld                              0x000000010033eafd innobase_start_or_create_for_mysql + 5805
14  mysqld                              0x00000001003114c1 _ZL13innobase_initPv + 1473
15  mysqld                              0x0000000100027028 _Z24ha_initialize_handlertonP13st_plugin_int + 104
16  mysqld                              0x000000010017f0f1 _ZL17plugin_initializeP13st_plugin_int + 97
17  mysqld                              0x0000000100181810 _Z11plugin_initPiPPci + 3776
18  mysqld                              0x00000001000ccce5 _Z11mysqld_mainiPPc + 10405
19  mysqld                              0x0000000100001804 start + 52
20  ???                                 0x000000000000000a 0x0 + 10
The manual page at http://dev.mysql.com/doc/mysql/en/crashing.html contains
information that should help you find out what is causing the crash.
140527 15:06:58 mysqld_safe mysqld from pid file /Applications/MAMP/tmp/mysql/mysql.pid ended

mysqldump: Got error: 2002: Can't connect to local MySQL server through socket '/tmp/mysql.sock' (2) when trying to connect

最佳答案

前言:这听起来很糟糕，但是在执行操作之前，请务必先阅读此答案中的所有内容。花费时间不能使事情变得更糟。阅读每个步骤，希望这将使您很清楚地了解并继续使用MAMP Pro中的MySQL数据库服务器并重新运行。

因此，您的InnoDB数据库似乎崩溃了。不是应用程序本身。密钥在这里在日志中:

140527 15:06:58 InnoDB: highest supported file format is Barracuda.
InnoDB: Log scan progressed past the checkpoint lsn 791075520
140527 15:06:58  InnoDB: Database was not shut down normally!
InnoDB: Starting crash recovery.
InnoDB: Reading tablespace information from the .ibd files...
InnoDB: Restoring possible half-written data pages from the doublewrite
InnoDB: buffer...
InnoDB: Doing recovery: scanned up to log sequence number 791076717
InnoDB: Database page corruption on disk or a failed
InnoDB: file read of page 8402.
InnoDB: You may have to recover from a backup.

/Library/Application Support/appsolute/MAMP PRO/db/mysql

which mysqldump

/Applications/MAMP/Library/bin/

/Applications/MAMP/Library/bin/mysqldump

/Library/Application Support/appsolute/MAMP PRO/db/mysql/ib_logfile0
/Library/Application Support/appsolute/MAMP PRO/db/mysql/ib_logfile1
/Library/Application Support/appsolute/MAMP PRO/db/mysql/ibdata1

In such cases, use the innodb_force_recovery option to force the InnoDB storage engine to start up while preventing background operations from running, so that you can dump your tables.

1 (SRV_FORCE_IGNORE_CORRUPT)

Lets the server run even if it detects a corrupt page. Tries to make SELECT * FROM tbl_name jump over corrupt index records and pages, which helps in dumping tables.

2 (SRV_FORCE_NO_BACKGROUND)

Prevents the master thread and any purge threads from running. If a crash would occur during the purge operation, this recovery value prevents it.

3 (SRV_FORCE_NO_TRX_UNDO)

Does not run transaction rollbacks after crash recovery.

4 (SRV_FORCE_NO_IBUF_MERGE)

Prevents insert buffer merge operations. If they would cause a crash, does not do them. Does not calculate table statistics.

5 (SRV_FORCE_NO_UNDO_LOG_SCAN)

Does not look at undo logs when starting the database: InnoDB treats even incomplete transactions as committed.

6 (SRV_FORCE_NO_LOG_REDO)

Does not do the redo log roll-forward in connection with recovery.

With this value, you might not be able to do queries other than a basic SELECT * FROM t, with no WHERE, ORDER BY, or other clauses. More complex queries could encounter corrupted data structures and fail.

If corruption within the table data prevents you from dumping the entire table contents, a query with an ORDER BY primary_key DESC clause might be able to dump the portion of the table after the corrupted part.

关于mysql - MAMP PRO崩溃； MySQL将不会在重新启动时启动，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/23898787/