Troubleshooting MySQL

[carmeloojr]

dear fellow community members,

I´ve some troubles with starting MySQL and hope for support.

1. Option: I try to start MySQL (command line)

# mysqld_safe start

161212 16:27:22 mysqld_safe Can't log to error log and syslog at the same time.  Remove all --log-error configuration options for --syslog to take effect.
161212 16:27:22 mysqld_safe Logging to '/var/log/mysql/error.log'.
161212 16:27:22 mysqld_safe Starting mysqld daemon with databases from /var/lib/mysql
161212 16:27:24 mysqld_safe mysqld from pid file /var/run/mysqld/mysqld.pid ended

MySQL clearly didn´t start:

# ps aux | grep mysql
root      9110  0.0  0.0  12728   932 pts/1    S+   16:34   0:00 grep mysql

Output from error.log

#cat /var/log/mysql/error.log
2016-12-10 16:34:13 1613 [Note] Plugin 'FEDERATED' is disabled.
2016-12-10 16:34:13 1613 [ERROR] Function 'innodb' already exists
2016-12-10 16:34:13 1613 [Warning] Couldn't load plugin named 'innodb' with soname 'ha_innodb.so'.
2016-12-10 16:34:13 1613 [ERROR] Function 'federated' already exists
2016-12-10 16:34:13 1613 [Warning] Couldn't load plugin named 'federated' with soname 'ha_federated.so'.
2016-12-10 16:34:13 1613 [ERROR] Function 'blackhole' already exists
2016-12-10 16:34:13 1613 [Warning] Couldn't load plugin named 'blackhole' with soname 'ha_blackhole.so'.
2016-12-10 16:34:13 1613 [ERROR] Function 'archive' already exists
2016-12-10 16:34:13 1613 [Warning] Couldn't load plugin named 'archive' with soname 'ha_archive.so'.
2016-12-10 16:34:13 1613 [Note] InnoDB: Using atomics to ref count buffer pool pages
2016-12-10 16:34:13 1613 [Note] InnoDB: The InnoDB memory heap is disabled
2016-12-10 16:34:13 1613 [Note] InnoDB: Mutexes and rw_locks use GCC atomic builtins
2016-12-10 16:34:13 1613 [Note] InnoDB: Memory barrier is not used
2016-12-10 16:34:13 1613 [Note] InnoDB: Compressed tables use zlib 1.2.8
2016-12-10 16:34:13 1613 [Note] InnoDB: Using Linux native AIO
2016-12-10 16:34:13 1613 [Note] InnoDB: Using CPU crc32 instructions
2016-12-10 16:34:13 1613 [Note] InnoDB: Initializing buffer pool, size = 128.0M
2016-12-10 16:34:13 1613 [Note] InnoDB: Completed initialization of buffer pool
2016-12-10 16:34:13 1613 [Note] InnoDB: Highest supported file format is Barracuda.
2016-12-10 16:34:13 1613 [Note] InnoDB: The log sequence numbers 1626087 and 1626087 in ibdata files do not match the log sequence number 1626097 in the ib_logfiles!
2016-12-10 16:34:13 1613 [Note] InnoDB: Database was not shutdown normally!
2016-12-10 16:34:13 1613 [Note] InnoDB: Starting crash recovery.
2016-12-10 16:34:13 1613 [Note] InnoDB: Reading tablespace information from the .ibd files...
2016-12-10 16:34:13 1613 [Note] InnoDB: Restoring possible half-written data pages 
2016-12-10 16:34:13 1613 [Note] InnoDB: from the doublewrite buffer...
2016-12-10 16:34:13 1613 [Note] InnoDB: 128 rollback segment(s) are active.
2016-12-10 16:34:13 1613 [Note] InnoDB: Waiting for purge to start
2016-12-10 16:34:13 1613 [Note] InnoDB: 5.6.30 started; log sequence number 1626097
2016-12-10 16:34:13 1613 [Note] Server hostname (bind-address): '127.0.0.1'; port: 3306
2016-12-10 16:34:13 1613 [Note]   - '127.0.0.1' resolves to '127.0.0.1';
2016-12-10 16:34:13 1613 [Note] Server socket created on IP: '127.0.0.1'.
2016-12-10 16:34:13 1613 [ERROR] Can't start server : Bind on unix socket: No such file or directory
2016-12-10 16:34:13 1613 [ERROR] Do you already have another mysqld server running on socket: /var/run/mysqld/mysqld.sock ?
2016-12-10 16:34:13 1613 [ERROR] Aborting

2016-12-10 16:34:13 1613 [Note] Binlog end
2016-12-10 16:34:13 1613 [Note] Shutting down plugin 'partition'
2016-12-10 16:34:13 1613 [Note] Shutting down plugin 'ARCHIVE'
2016-12-10 16:34:13 1613 [Note] Shutting down plugin 'BLACKHOLE'
2016-12-10 16:34:13 1613 [Note] Shutting down plugin 'INNODB_SYS_DATAFILES'
2016-12-10 16:34:13 1613 [Note] Shutting down plugin 'INNODB_SYS_TABLESPACES'
2016-12-10 16:34:13 1613 [Note] Shutting down plugin 'INNODB_SYS_FOREIGN_COLS'
2016-12-10 16:34:13 1613 [Note] Shutting down plugin 'INNODB_SYS_FOREIGN'
2016-12-10 16:34:13 1613 [Note] Shutting down plugin 'INNODB_SYS_FIELDS'
2016-12-10 16:34:13 1613 [Note] Shutting down plugin 'INNODB_SYS_COLUMNS'
2016-12-10 16:34:13 1613 [Note] Shutting down plugin 'INNODB_SYS_INDEXES'
2016-12-10 16:34:13 1613 [Note] Shutting down plugin 'INNODB_SYS_TABLESTATS'
2016-12-10 16:34:13 1613 [Note] Shutting down plugin 'INNODB_SYS_TABLES'
2016-12-10 16:34:13 1613 [Note] Shutting down plugin 'INNODB_FT_INDEX_TABLE'
2016-12-10 16:34:13 1613 [Note] Shutting down plugin 'INNODB_FT_INDEX_CACHE'
2016-12-10 16:34:13 1613 [Note] Shutting down plugin 'INNODB_FT_CONFIG'
2016-12-10 16:34:13 1613 [Note] Shutting down plugin 'INNODB_FT_BEING_DELETED'
2016-12-10 16:34:13 1613 [Note] Shutting down plugin 'INNODB_FT_DELETED'
2016-12-10 16:34:13 1613 [Note] Shutting down plugin 'INNODB_FT_DEFAULT_STOPWORD'
2016-12-10 16:34:13 1613 [Note] Shutting down plugin 'INNODB_METRICS'
2016-12-10 16:34:13 1613 [Note] Shutting down plugin 'INNODB_BUFFER_POOL_STATS'
2016-12-10 16:34:13 1613 [Note] Shutting down plugin 'INNODB_BUFFER_PAGE_LRU'
2016-12-10 16:34:13 1613 [Note] Shutting down plugin 'INNODB_BUFFER_PAGE'
2016-12-10 16:34:13 1613 [Note] Shutting down plugin 'INNODB_CMP_PER_INDEX_RESET'
2016-12-10 16:34:13 1613 [Note] Shutting down plugin 'INNODB_CMP_PER_INDEX'
2016-12-10 16:34:13 1613 [Note] Shutting down plugin 'INNODB_CMPMEM_RESET'
2016-12-10 16:34:13 1613 [Note] Shutting down plugin 'INNODB_CMPMEM'
2016-12-10 16:34:13 1613 [Note] Shutting down plugin 'INNODB_CMP_RESET'
2016-12-10 16:34:13 1613 [Note] Shutting down plugin 'INNODB_CMP'
2016-12-10 16:34:13 1613 [Note] Shutting down plugin 'INNODB_LOCK_WAITS'
2016-12-10 16:34:13 1613 [Note] Shutting down plugin 'INNODB_LOCKS'
2016-12-10 16:34:13 1613 [Note] Shutting down plugin 'INNODB_TRX'
2016-12-10 16:34:13 1613 [Note] Shutting down plugin 'InnoDB'
2016-12-10 16:34:13 1613 [Note] InnoDB: FTS optimize thread exiting.
2016-12-10 16:34:13 1613 [Note] InnoDB: Starting shutdown...
2016-12-10 16:34:15 1613 [Note] InnoDB: Shutdown completed; log sequence number 1626107
2016-12-10 16:34:15 1613 [Note] Shutting down plugin 'PERFORMANCE_SCHEMA'
2016-12-10 16:34:15 1613 [Note] Shutting down plugin 'CSV'
2016-12-10 16:34:15 1613 [Note] Shutting down plugin 'MEMORY'
2016-12-10 16:34:15 1613 [Note] Shutting down plugin 'MyISAM'
2016-12-10 16:34:15 1613 [Note] Shutting down plugin 'MRG_MYISAM'
2016-12-10 16:34:15 1613 [Note] Shutting down plugin 'sha256_password'
2016-12-10 16:34:15 1613 [Note] Shutting down plugin 'mysql_old_password'
2016-12-10 16:34:15 1613 [Note] Shutting down plugin 'mysql_native_password'
2016-12-10 16:34:15 1613 [Note] Shutting down plugin 'binlog'
2016-12-10 16:34:15 1613 [Note] mysqld: Shutdown complete

Any solutions?

2. Option: start MySQL (GUI) works, altough I can´t unterstand why this command starts two servers

# service mysql start
# ps aux | grep mysql
mysql     9290  0.0  0.0   4284  1456 ?        Ss   16:40   0:00 /bin/sh /usr/bin/mysqld_safe
mysql     9637  1.2  5.6 729256 116832 ?       Sl   16:40   0:00 /usr/sbin/mysqld --basedir=/usr --datadir=/var/lib/mysql --plugin-dir=/usr/lib/mysql/plugin --log-error=/var/log/mysql/error.log --pid-file=/var/run/mysqld/mysqld.pid --socket=/var/run/mysqld/mysqld.sock --port=3306
root      9663  0.0  0.0  12728   944 pts/1    S+   16:40   0:00 grep mysql

thanks to everyone