Here is the recent log: 140916 05:43:38 innobackupex: Starting ibbackup with command: xtrabackup --defaults-file="/mnt/MOUNTED_DIR/db_back/server.name.com/full/2014-09-14_03-30-03/backup-my.cnf" --defaults-group="mysqld" --prepare --target-dir=/mnt/MOUNTED_DIR/db_back/server.name.com/full/2014-09-14_03-30-03 --incremental-dir=/mnt/MOUNTED_DIR/db_back/server.name.com/incremental/2014-09-16_03-30-03 --tmpdir=/tmp Warning: World-writable config file '/mnt/MOUNTED_DIR/db_back/server.name.com/full/2014-09-14_03-30-03/backup-my.cnf' is ignored xtrabackup version 2.2.3 based on MySQL server 5.6.17 Linux (x86_64) (revision id: ) incremental backup from 14111243331989 is enabled. xtrabackup: cd to /mnt/MOUNTED_DIR/db_back/server.name.com/full/2014-09-14_03-30-03 xtrabackup: This target seems to be already prepared. xtrabackup: xtrabackup_logfile detected: size=1891237888, start_lsn=(14156284223024) xtrabackup: using the following InnoDB configuration for recovery: xtrabackup: innodb_data_home_dir = ./ xtrabackup: innodb_data_file_path = ibdata1:10M:autoextend xtrabackup: innodb_log_group_home_dir = /mnt/MOUNTED_DIR/db_back/server.name.com/incremental/2014-09-16_03-30-03 xtrabackup: innodb_log_files_in_group = 1 xtrabackup: innodb_log_file_size = 1891237888 xtrabackup: page size for /mnt/MOUNTED_DIR/db_back/server.name.com/incremental/2014-09-16_03-30-03/ibdata1.delta is 16384 bytes InnoDB: Failed to set O_DIRECT on file /mnt/MOUNTED_DIR/db_back/server.name.com/incremental/2014-09-16_03-30-03/ibdata1.delta: OPEN: Invalid argument, continuing anyway. O_DIRECT is known to result in 'Invalid argument' on Linux on tmpfs, see MySQL Bug#26662. Applying /mnt/MOUNTED_DIR/db_back/server.name.com/incremental/2014-09-16_03-30-03/ibdata1.delta to ./ibdata1... xtrabackup: page size for /mnt/MOUNTED_DIR/db_back/server.name.com/incremental/2014-09-16_03-30-03/currclick_mdl/mdl_assign.ibd.delta is 16384 bytes Applying /mnt/MOUNTED_DIR/db_back/server.name.com/incremental/2014-09-16_03-30-03/currclick_mdl/mdl_assign.ibd.delta to ./currclick_mdl/mdl_assign.ibd... xtrabackup: page size for /mnt/MOUNTED_DIR/db_back/server.name.com/incremental/2014-09-16_03-30-03/currclick_mdl/mdl_assignfeedback_comments.ibd.delta is 16384 bytes Applying /mnt/MOUNTED_DIR/db_back/server.name.com/incremental/2014-09-16_03-30-03/currclick_mdl/mdl_assignfeedback_comments.ibd.delta to ./currclick_mdl/mdl_assignfeedback_comments.ibd... xtrabackup: page size for /mnt/MOUNTED_DIR/db_back/server.name.com/incremental/2014-09-16_03-30-03/currclick_mdl/mdl_assignfeedback_editpdf_annot.ibd.delta is 16384 bytes Applying /mnt/MOUNTED_DIR/db_back/server.name.com/incremental/2014-09-16_03-30-03/currclick_mdl/mdl_assignfeedback_editpdf_annot.ibd.delta to ./currclick_mdl/mdl_assignfeedback_editpdf_annot.ibd... xtrabackup: page size for /mnt/MOUNTED_DIR/db_back/server.name.com/incremental/2014-09-16_03-30-03/currclick_mdl/mdl_assignfeedback_editpdf_cmnt.ibd.delta is 16384 bytes Applying /mnt/MOUNTED_DIR/db_back/server.name.com/incremental/2014-09-16_03-30-03/currclick_mdl/mdl_assignfeedback_editpdf_cmnt.ibd.delta to ./currclick_mdl/mdl_assignfeedback_editpdf_cmnt.ibd... xtrabackup: page size for /mnt/MOUNTED_DIR/db_back/server.name.com/incremental/2014-09-16_03-30-03/currclick_mdl/mdl_assignfeedback_editpdf_quick.ibd.delta is 16384 bytes .......... .......... .......... .......... InnoDB: Doing recovery: scanned up to log sequence number 14157965325011 (100%) InnoDB: Starting an apply batch of log records to the database... InnoDB: Progress in percent: 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 InnoDB: Apply batch completed InnoDB: In a MySQL replication slave the last master binlog file InnoDB: position 0 329970412, file name data3-bin.001806 InnoDB: Last MySQL binlog file position 0 1066483592, file name data1-bin.003053 InnoDB: 128 rollback segment(s) are active. InnoDB: Waiting for purge to start InnoDB: 5.6.17 started; log sequence number 14157965325011 [notice (again)] If you use binary log and don't use any hack of group commit, the binary log position seems to be: InnoDB: Last MySQL binlog file position 0 1066483592, file name data1-bin.003053 xtrabackup: starting shutdown with innodb_fast_shutdown = 1 InnoDB: FTS optimize thread exiting. InnoDB: Starting shutdown... 2014-09-16 07:25:32 4ab76940 InnoDB: Assertion failure in thread 1253534016 in file buf0flu.cc line 2503 InnoDB: Failing assertion: UT_LIST_GET_LEN(buf_pool->flush_list) == 0 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/5.6/en/forcing-innodb-recovery.html InnoDB: about forcing recovery. innobackupex: Error: innobackupex: ibbackup failed at /usr/bin/innobackupex line 2610. 541514,1 Bot