Last_IO_Errno: 1236 Last_IO_Error: Got fatal error 1236 from_MySQL

mysql> show slave status/G*************************** 1. row ***************************               Slave_IO_State:                   Master_Host: 10.122.41.208                  Master_User: replication                  Master_Port: 3306                Connect_Retry: 60              Master_Log_File: mysql-bin.000173          Read_Master_Log_Pos: 90376278               Relay_Log_File: mysql-relay-bin.001980                Relay_Log_Pos: 90376424        Relay_Master_Log_File: mysql-bin.000173             Slave_IO_Running: No            Slave_SQL_Running: Yes              Replicate_Do_DB:           Replicate_Ignore_DB:            Replicate_Do_Table:        Replicate_Ignore_Table:       Replicate_Wild_Do_Table:   Replicate_Wild_Ignore_Table:                    Last_Errno: 0                   Last_Error:                  Skip_Counter: 0          Exec_Master_Log_Pos: 90376278              Relay_Log_Space: 90376726              Until_Condition: None               Until_Log_File:                 Until_Log_Pos: 0           Master_SSL_Allowed: No           Master_SSL_CA_File:            Master_SSL_CA_Path:               Master_SSL_Cert:             Master_SSL_Cipher:                Master_SSL_Key:         Seconds_Behind_Master: NULLMaster_SSL_Verify_Server_Cert: No                Last_IO_Errno: 1236                Last_IO_Error: Got fatal error 1236 from master when reading data from binary log: 'Client requested master to start replication from impossible position; the first event 'mysql-bin.000173' at 90376278, the last event read from '/mysql/binlog/mysql-bin.000173' at 4, the last byte read from '/mysql/binlog/mysql-bin.000173' at 4.'               Last_SQL_Errno: 0               Last_SQL_Error:   Replicate_Ignore_Server_Ids:              Master_Server_Id: 111 row in set (0.00 sec)mysql> 

stop slave;set global sql_slave_skip_counter=1;start slave;show slave status/G;