Thread 11 (Thread 0x7f7a121fc700 (LWP 6282)):
#0  0x0000003b9160b43c in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
#1  0x00000000004a8da9 in os_cond_wait (event=0x2b7c540, reset_sig_count=1) at /mnt/xb-2.0/Percona-Server-5.5/storage/innobase/os/os0sync.c:207
#2  os_event_wait_low (event=0x2b7c540, reset_sig_count=1) at /mnt/xb-2.0/Percona-Server-5.5/storage/innobase/os/os0sync.c:609
#3  0x00000000004a6089 in os_aio_simulated_handle (global_segment=1, message1=0x7f7a121fbe68, message2=0x7f7a121fbe60, type=0x7f7a121fbe58, space_id=0x7f7a121fbe50) at /mnt/xb-2.0/Percona-Server-5.5/storage/innobase/os/os0file.c:5097
#4  0x000000000046e794 in fil_aio_wait (segment=1) at /mnt/xb-2.0/Percona-Server-5.5/storage/innobase/fil/fil0fil.c:5701
#5  0x00000000004ea248 in io_handler_thread (arg=<value optimized out>) at /mnt/xb-2.0/Percona-Server-5.5/storage/innobase/srv/srv0start.c:485
#6  0x0000003b91607851 in start_thread () from /lib64/libpthread.so.0
#7  0x0000003b90ee890d in clone () from /lib64/libc.so.6

Thread 10 (Thread 0x7f7a135fe700 (LWP 6281)):
#0  0x0000003b9160b43c in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
#1  0x00000000004a8da9 in os_cond_wait (event=0x2b7c4c0, reset_sig_count=1) at /mnt/xb-2.0/Percona-Server-5.5/storage/innobase/os/os0sync.c:207
#2  os_event_wait_low (event=0x2b7c4c0, reset_sig_count=1) at /mnt/xb-2.0/Percona-Server-5.5/storage/innobase/os/os0sync.c:609
#3  0x00000000004a6089 in os_aio_simulated_handle (global_segment=0, message1=0x7f7a135fde68, message2=0x7f7a135fde60, type=0x7f7a135fde58, space_id=0x7f7a135fde50) at /mnt/xb-2.0/Percona-Server-5.5/storage/innobase/os/os0file.c:5097
#4  0x000000000046e794 in fil_aio_wait (segment=0) at /mnt/xb-2.0/Percona-Server-5.5/storage/innobase/fil/fil0fil.c:5701
#5  0x00000000004ea248 in io_handler_thread (arg=<value optimized out>) at /mnt/xb-2.0/Percona-Server-5.5/storage/innobase/srv/srv0start.c:485
#6  0x0000003b91607851 in start_thread () from /lib64/libpthread.so.0
#7  0x0000003b90ee890d in clone () from /lib64/libc.so.6

Thread 9 (Thread 0x7f7a12bfd700 (LWP 6290)):
#0  0x0000003b9160b43c in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
#1  0x00000000004a8da9 in os_cond_wait (event=0x2b7c940, reset_sig_count=1) at /mnt/xb-2.0/Percona-Server-5.5/storage/innobase/os/os0sync.c:207
#2  os_event_wait_low (event=0x2b7c940, reset_sig_count=1) at /mnt/xb-2.0/Percona-Server-5.5/storage/innobase/os/os0sync.c:609
#3  0x00000000004a6089 in os_aio_simulated_handle (global_segment=9, message1=0x7f7a12bfce68, message2=0x7f7a12bfce60, type=0x7f7a12bfce58, space_id=0x7f7a12bfce50) at /mnt/xb-2.0/Percona-Server-5.5/storage/innobase/os/os0file.c:5097
#4  0x000000000046e794 in fil_aio_wait (segment=9) at /mnt/xb-2.0/Percona-Server-5.5/storage/innobase/fil/fil0fil.c:5701
#5  0x00000000004ea248 in io_handler_thread (arg=<value optimized out>) at /mnt/xb-2.0/Percona-Server-5.5/storage/innobase/srv/srv0start.c:485
#6  0x0000003b91607851 in start_thread () from /lib64/libpthread.so.0
#7  0x0000003b90ee890d in clone () from /lib64/libc.so.6

Thread 8 (Thread 0x7f7a13fff700 (LWP 6289)):
#0  0x0000003b9160b43c in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
#1  0x00000000004a8da9 in os_cond_wait (event=0x2b7c8c0, reset_sig_count=1) at /mnt/xb-2.0/Percona-Server-5.5/storage/innobase/os/os0sync.c:207
#2  os_event_wait_low (event=0x2b7c8c0, reset_sig_count=1) at /mnt/xb-2.0/Percona-Server-5.5/storage/innobase/os/os0sync.c:609
#3  0x00000000004a6089 in os_aio_simulated_handle (global_segment=8, message1=0x7f7a13ffee68, message2=0x7f7a13ffee60, type=0x7f7a13ffee58, space_id=0x7f7a13ffee50) at /mnt/xb-2.0/Percona-Server-5.5/storage/innobase/os/os0file.c:5097
#4  0x000000000046e794 in fil_aio_wait (segment=8) at /mnt/xb-2.0/Percona-Server-5.5/storage/innobase/fil/fil0fil.c:5701
#5  0x00000000004ea248 in io_handler_thread (arg=<value optimized out>) at /mnt/xb-2.0/Percona-Server-5.5/storage/innobase/srv/srv0start.c:485
#6  0x0000003b91607851 in start_thread () from /lib64/libpthread.so.0
#7  0x0000003b90ee890d in clone () from /lib64/libc.so.6

Thread 7 (Thread 0x7f7a1c3d5720 (LWP 6269)):
#0  0x0000003b90eacb8d in nanosleep () from /lib64/libc.so.6
#1  0x0000003b90ee1d64 in usleep () from /lib64/libc.so.6
#2  0x000000000049ba62 in recv_apply_hashed_log_recs (allow_ibuf=0) at /mnt/xb-2.0/Percona-Server-5.5/storage/innobase/log/log0recv.c:1899
#3  0x000000000049cec8 in recv_scan_log_recs (available_memory=88064000, store_to_hash=1, buf=<value optimized out>, len=<value optimized out>, start_lsn=<value optimized out>, contiguous_lsn=<value optimized out>, group_scanned_lsn=0x7fff0a94ad88)
    at /mnt/xb-2.0/Percona-Server-5.5/storage/innobase/log/log0recv.c:2846
#4  0x000000000049d988 in recv_group_scan_log_recs (min_flushed_lsn=1597945, max_flushed_lsn=1597945) at /mnt/xb-2.0/Percona-Server-5.5/storage/innobase/log/log0recv.c:2889
#5  recv_recovery_from_checkpoint_start_func (min_flushed_lsn=1597945, max_flushed_lsn=1597945) at /mnt/xb-2.0/Percona-Server-5.5/storage/innobase/log/log0recv.c:3178
#6  0x00000000004ecbd7 in innobase_start_or_create_for_mysql () at /mnt/xb-2.0/Percona-Server-5.5/storage/innobase/srv/srv0start.c:1854
#7  0x00000000004100e9 in innodb_init () at xtrabackup.cc:3422
#8  xtrabackup_prepare_func () at xtrabackup.cc:7972
#9  0x0000000000411a1b in main (argc=0, argv=0x24b78e0) at xtrabackup.cc:8622

Thread 6 (Thread 0x7f7a191ce700 (LWP 6288)):
#0  0x0000003b9160b43c in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
#1  0x00000000004a8da9 in os_cond_wait (event=0x2b7c840, reset_sig_count=1) at /mnt/xb-2.0/Percona-Server-5.5/storage/innobase/os/os0sync.c:207
#2  os_event_wait_low (event=0x2b7c840, reset_sig_count=1) at /mnt/xb-2.0/Percona-Server-5.5/storage/innobase/os/os0sync.c:609
#3  0x00000000004a6089 in os_aio_simulated_handle (global_segment=7, message1=0x7f7a191cde68, message2=0x7f7a191cde60, type=0x7f7a191cde58, space_id=0x7f7a191cde50) at /mnt/xb-2.0/Percona-Server-5.5/storage/innobase/os/os0file.c:5097
#4  0x000000000046e794 in fil_aio_wait (segment=7) at /mnt/xb-2.0/Percona-Server-5.5/storage/innobase/fil/fil0fil.c:5701
#5  0x00000000004ea248 in io_handler_thread (arg=<value optimized out>) at /mnt/xb-2.0/Percona-Server-5.5/storage/innobase/srv/srv0start.c:485
#6  0x0000003b91607851 in start_thread () from /lib64/libpthread.so.0
#7  0x0000003b90ee890d in clone () from /lib64/libc.so.6

Thread 5 (Thread 0x7f7a1a5d0700 (LWP 6287)):
#0  0x0000003b9160b43c in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
#1  0x00000000004a8da9 in os_cond_wait (event=0x2b7c7c0, reset_sig_count=1) at /mnt/xb-2.0/Percona-Server-5.5/storage/innobase/os/os0sync.c:207
#2  os_event_wait_low (event=0x2b7c7c0, reset_sig_count=1) at /mnt/xb-2.0/Percona-Server-5.5/storage/innobase/os/os0sync.c:609
#3  0x00000000004a6089 in os_aio_simulated_handle (global_segment=6, message1=0x7f7a1a5cfe68, message2=0x7f7a1a5cfe60, type=0x7f7a1a5cfe58, space_id=0x7f7a1a5cfe50) at /mnt/xb-2.0/Percona-Server-5.5/storage/innobase/os/os0file.c:5097
#4  0x000000000046e794 in fil_aio_wait (segment=6) at /mnt/xb-2.0/Percona-Server-5.5/storage/innobase/fil/fil0fil.c:5701
#5  0x00000000004ea248 in io_handler_thread (arg=<value optimized out>) at /mnt/xb-2.0/Percona-Server-5.5/storage/innobase/srv/srv0start.c:485
#6  0x0000003b91607851 in start_thread () from /lib64/libpthread.so.0
#7  0x0000003b90ee890d in clone () from /lib64/libc.so.6

Thread 4 (Thread 0x7f7a1afd1700 (LWP 6286)):
#0  0x0000003b9160b43c in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
#1  0x00000000004a8da9 in os_cond_wait (event=0x2b7c740, reset_sig_count=1) at /mnt/xb-2.0/Percona-Server-5.5/storage/innobase/os/os0sync.c:207
#2  os_event_wait_low (event=0x2b7c740, reset_sig_count=1) at /mnt/xb-2.0/Percona-Server-5.5/storage/innobase/os/os0sync.c:609
#3  0x00000000004a6089 in os_aio_simulated_handle (global_segment=5, message1=0x7f7a1afd0e68, message2=0x7f7a1afd0e60, type=0x7f7a1afd0e58, space_id=0x7f7a1afd0e50) at /mnt/xb-2.0/Percona-Server-5.5/storage/innobase/os/os0file.c:5097
#4  0x000000000046e794 in fil_aio_wait (segment=5) at /mnt/xb-2.0/Percona-Server-5.5/storage/innobase/fil/fil0fil.c:5701
#5  0x00000000004ea248 in io_handler_thread (arg=<value optimized out>) at /mnt/xb-2.0/Percona-Server-5.5/storage/innobase/srv/srv0start.c:485
#6  0x0000003b91607851 in start_thread () from /lib64/libpthread.so.0
#7  0x0000003b90ee890d in clone () from /lib64/libc.so.6

Thread 3 (Thread 0x7f7a1b9d2700 (LWP 6285)):
#0  0x0000003b9160b43c in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
#1  0x00000000004a8da9 in os_cond_wait (event=0x2b7c6c0, reset_sig_count=1) at /mnt/xb-2.0/Percona-Server-5.5/storage/innobase/os/os0sync.c:207
#2  os_event_wait_low (event=0x2b7c6c0, reset_sig_count=1) at /mnt/xb-2.0/Percona-Server-5.5/storage/innobase/os/os0sync.c:609
#3  0x00000000004a6089 in os_aio_simulated_handle (global_segment=4, message1=0x7f7a1b9d1e68, message2=0x7f7a1b9d1e60, type=0x7f7a1b9d1e58, space_id=0x7f7a1b9d1e50) at /mnt/xb-2.0/Percona-Server-5.5/storage/innobase/os/os0file.c:5097
#4  0x000000000046e794 in fil_aio_wait (segment=4) at /mnt/xb-2.0/Percona-Server-5.5/storage/innobase/fil/fil0fil.c:5701
#5  0x00000000004ea248 in io_handler_thread (arg=<value optimized out>) at /mnt/xb-2.0/Percona-Server-5.5/storage/innobase/srv/srv0start.c:485
#6  0x0000003b91607851 in start_thread () from /lib64/libpthread.so.0
#7  0x0000003b90ee890d in clone () from /lib64/libc.so.6

Thread 2 (Thread 0x7f7a1c3d3700 (LWP 6284)):
#0  0x0000003b9160b43c in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
#1  0x00000000004a8da9 in os_cond_wait (event=0x2b7c640, reset_sig_count=1) at /mnt/xb-2.0/Percona-Server-5.5/storage/innobase/os/os0sync.c:207
#2  os_event_wait_low (event=0x2b7c640, reset_sig_count=1) at /mnt/xb-2.0/Percona-Server-5.5/storage/innobase/os/os0sync.c:609
#3  0x00000000004a6089 in os_aio_simulated_handle (global_segment=3, message1=0x7f7a1c3d2e68, message2=0x7f7a1c3d2e60, type=0x7f7a1c3d2e58, space_id=0x7f7a1c3d2e50) at /mnt/xb-2.0/Percona-Server-5.5/storage/innobase/os/os0file.c:5097
#4  0x000000000046e794 in fil_aio_wait (segment=3) at /mnt/xb-2.0/Percona-Server-5.5/storage/innobase/fil/fil0fil.c:5701
#5  0x00000000004ea248 in io_handler_thread (arg=<value optimized out>) at /mnt/xb-2.0/Percona-Server-5.5/storage/innobase/srv/srv0start.c:485
#6  0x0000003b91607851 in start_thread () from /lib64/libpthread.so.0
#7  0x0000003b90ee890d in clone () from /lib64/libc.so.6

Thread 1 (Thread 0x7f7a19bcf700 (LWP 6283)):
#0  0x0000003b90e328a5 in raise () from /lib64/libc.so.6
#1  0x0000003b90e34085 in abort () from /lib64/libc.so.6
#2  0x000000000049821d in recv_parse_or_apply_log_rec_body (type=42 '*', ptr=<value optimized out>, end_ptr=0x7f7a117e60ae "", block=0x7f7a0b1afc80, mtr=<value optimized out>) at /mnt/xb-2.0/Percona-Server-5.5/storage/innobase/log/log0recv.c:1244
#3  0x000000000049989d in recv_recover_page_func (just_read_in=<value optimized out>, block=0x7f7a0b1afc80) at /mnt/xb-2.0/Percona-Server-5.5/storage/innobase/log/log0recv.c:1666
#4  0x000000000043c5de in buf_page_io_complete (bpage=0x7f7a0b1afc80) at /mnt/xb-2.0/Percona-Server-5.5/storage/innobase/buf/buf0buf.c:4065
#5  0x000000000046e7da in fil_aio_wait (segment=2) at /mnt/xb-2.0/Percona-Server-5.5/storage/innobase/fil/fil0fil.c:5744
#6  0x00000000004ea248 in io_handler_thread (arg=<value optimized out>) at /mnt/xb-2.0/Percona-Server-5.5/storage/innobase/srv/srv0start.c:485
#7  0x0000003b91607851 in start_thread () from /lib64/libpthread.so.0
#8  0x0000003b90ee890d in clone () from /lib64/libc.so.6