Backtrace:

Thread 13 (Thread 0x7fcca4a79700 (LWP 10896)):
#0  0x000000391b00b43c in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
#1  0x00000000004af679 in os_cond_wait (event=0x216f9b0, reset_sig_count=1) at /home/glorch/dev/ps-5.5/xb-2.1/Percona-Server-5.5/storage/innobase/os/os0sync.c:207
#2  os_event_wait_low (event=0x216f9b0, reset_sig_count=1) at /home/glorch/dev/ps-5.5/xb-2.1/Percona-Server-5.5/storage/innobase/os/os0sync.c:609
#3  0x00000000004add69 in os_aio_simulated_handle (global_segment=5, message1=0x7fcca4a78e68, message2=0x7fcca4a78e60, type=0x7fcca4a78e58, space_id=0x7fcca4a78e50) at /home/glorch/dev/ps-5.5/xb-2.1/Percona-Server-5.5/storage/innobase/os/os0file.c:5097
#4  0x00000000004748d4 in fil_aio_wait (segment=5) at /home/glorch/dev/ps-5.5/xb-2.1/Percona-Server-5.5/storage/innobase/fil/fil0fil.c:5701
#5  0x0000000000409b78 in io_handler_thread (arg=<value optimized out>) at xtrabackup.cc:2276
#6  0x000000391b007851 in start_thread () from /lib64/libpthread.so.0
#7  0x000000391a8e811d in clone () from /lib64/libc.so.6

Thread 12 (Thread 0x7fcc9f5fe700 (LWP 10898)):
#0  0x000000391b00b43c in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
#1  0x00000000004af679 in os_cond_wait (event=0x216fab0, reset_sig_count=1) at /home/glorch/dev/ps-5.5/xb-2.1/Percona-Server-5.5/storage/innobase/os/os0sync.c:207
#2  os_event_wait_low (event=0x216fab0, reset_sig_count=1) at /home/glorch/dev/ps-5.5/xb-2.1/Percona-Server-5.5/storage/innobase/os/os0sync.c:609
#3  0x00000000004add69 in os_aio_simulated_handle (global_segment=7, message1=0x7fcc9f5fde68, message2=0x7fcc9f5fde60, type=0x7fcc9f5fde58, space_id=0x7fcc9f5fde50) at /home/glorch/dev/ps-5.5/xb-2.1/Percona-Server-5.5/storage/innobase/os/os0file.c:5097
#4  0x00000000004748d4 in fil_aio_wait (segment=7) at /home/glorch/dev/ps-5.5/xb-2.1/Percona-Server-5.5/storage/innobase/fil/fil0fil.c:5701
#5  0x0000000000409b78 in io_handler_thread (arg=<value optimized out>) at xtrabackup.cc:2276
#6  0x000000391b007851 in start_thread () from /lib64/libpthread.so.0
#7  0x000000391a8e811d in clone () from /lib64/libc.so.6

Thread 11 (Thread 0x7fcca7e6c700 (LWP 10891)):
#0  0x000000391b00b43c in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
#1  0x00000000004af679 in os_cond_wait (event=0x216f730, reset_sig_count=1) at /home/glorch/dev/ps-5.5/xb-2.1/Percona-Server-5.5/storage/innobase/os/os0sync.c:207
#2  os_event_wait_low (event=0x216f730, reset_sig_count=1) at /home/glorch/dev/ps-5.5/xb-2.1/Percona-Server-5.5/storage/innobase/os/os0sync.c:609
#3  0x00000000004add69 in os_aio_simulated_handle (global_segment=0, message1=0x7fcca7e6be68, message2=0x7fcca7e6be60, type=0x7fcca7e6be58, space_id=0x7fcca7e6be50) at /home/glorch/dev/ps-5.5/xb-2.1/Percona-Server-5.5/storage/innobase/os/os0file.c:5097
#4  0x00000000004748d4 in fil_aio_wait (segment=0) at /home/glorch/dev/ps-5.5/xb-2.1/Percona-Server-5.5/storage/innobase/fil/fil0fil.c:5701
#5  0x0000000000409b78 in io_handler_thread (arg=<value optimized out>) at xtrabackup.cc:2276
#6  0x000000391b007851 in start_thread () from /lib64/libpthread.so.0
#7  0x000000391a8e811d in clone () from /lib64/libc.so.6

Thread 10 (Thread 0x7fcca687c700 (LWP 10893)):
#0  0x000000391b00b43c in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
#1  0x00000000004af679 in os_cond_wait (event=0x216f830, reset_sig_count=1) at /home/glorch/dev/ps-5.5/xb-2.1/Percona-Server-5.5/storage/innobase/os/os0sync.c:207
#2  os_event_wait_low (event=0x216f830, reset_sig_count=1) at /home/glorch/dev/ps-5.5/xb-2.1/Percona-Server-5.5/storage/innobase/os/os0sync.c:609
#3  0x00000000004add69 in os_aio_simulated_handle (global_segment=2, message1=0x7fcca687be68, message2=0x7fcca687be60, type=0x7fcca687be58, space_id=0x7fcca687be50) at /home/glorch/dev/ps-5.5/xb-2.1/Percona-Server-5.5/storage/innobase/os/os0file.c:5097
#4  0x00000000004748d4 in fil_aio_wait (segment=2) at /home/glorch/dev/ps-5.5/xb-2.1/Percona-Server-5.5/storage/innobase/fil/fil0fil.c:5701
#5  0x0000000000409b78 in io_handler_thread (arg=<value optimized out>) at xtrabackup.cc:2276
#6  0x000000391b007851 in start_thread () from /lib64/libpthread.so.0
#7  0x000000391a8e811d in clone () from /lib64/libc.so.6

Thread 9 (Thread 0x7fcca5e7b700 (LWP 10894)):
#0  0x000000391b00b43c in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
#1  0x00000000004af679 in os_cond_wait (event=0x216f8b0, reset_sig_count=1) at /home/glorch/dev/ps-5.5/xb-2.1/Percona-Server-5.5/storage/innobase/os/os0sync.c:207
#2  os_event_wait_low (event=0x216f8b0, reset_sig_count=1) at /home/glorch/dev/ps-5.5/xb-2.1/Percona-Server-5.5/storage/innobase/os/os0sync.c:609
#3  0x00000000004add69 in os_aio_simulated_handle (global_segment=3, message1=0x7fcca5e7ae68, message2=0x7fcca5e7ae60, type=0x7fcca5e7ae58, space_id=0x7fcca5e7ae50) at /home/glorch/dev/ps-5.5/xb-2.1/Percona-Server-5.5/storage/innobase/os/os0file.c:5097
#4  0x00000000004748d4 in fil_aio_wait (segment=3) at /home/glorch/dev/ps-5.5/xb-2.1/Percona-Server-5.5/storage/innobase/fil/fil0fil.c:5701
#5  0x0000000000409b78 in io_handler_thread (arg=<value optimized out>) at xtrabackup.cc:2276
#6  0x000000391b007851 in start_thread () from /lib64/libpthread.so.0
#7  0x000000391a8e811d in clone () from /lib64/libc.so.6

Thread 8 (Thread 0x7fcc9ffff700 (LWP 10897)):
#0  0x000000391b00b43c in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
#1  0x00000000004af679 in os_cond_wait (event=0x216fa30, reset_sig_count=1) at /home/glorch/dev/ps-5.5/xb-2.1/Percona-Server-5.5/storage/innobase/os/os0sync.c:207
#2  os_event_wait_low (event=0x216fa30, reset_sig_count=1) at /home/glorch/dev/ps-5.5/xb-2.1/Percona-Server-5.5/storage/innobase/os/os0sync.c:609
#3  0x00000000004add69 in os_aio_simulated_handle (global_segment=6, message1=0x7fcc9fffee68, message2=0x7fcc9fffee60, type=0x7fcc9fffee58, space_id=0x7fcc9fffee50) at /home/glorch/dev/ps-5.5/xb-2.1/Percona-Server-5.5/storage/innobase/os/os0file.c:5097
#4  0x00000000004748d4 in fil_aio_wait (segment=6) at /home/glorch/dev/ps-5.5/xb-2.1/Percona-Server-5.5/storage/innobase/fil/fil0fil.c:5701
#5  0x0000000000409b78 in io_handler_thread (arg=<value optimized out>) at xtrabackup.cc:2276
#6  0x000000391b007851 in start_thread () from /lib64/libpthread.so.0
#7  0x000000391a8e811d in clone () from /lib64/libc.so.6

Thread 7 (Thread 0x7fcc9ebfd700 (LWP 10899)):
#0  0x000000391b00b43c in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
#1  0x00000000004af679 in os_cond_wait (event=0x216fb30, reset_sig_count=1) at /home/glorch/dev/ps-5.5/xb-2.1/Percona-Server-5.5/storage/innobase/os/os0sync.c:207
#2  os_event_wait_low (event=0x216fb30, reset_sig_count=1) at /home/glorch/dev/ps-5.5/xb-2.1/Percona-Server-5.5/storage/innobase/os/os0sync.c:609
#3  0x00000000004add69 in os_aio_simulated_handle (global_segment=8, message1=0x7fcc9ebfce68, message2=0x7fcc9ebfce60, type=0x7fcc9ebfce58, space_id=0x7fcc9ebfce50) at /home/glorch/dev/ps-5.5/xb-2.1/Percona-Server-5.5/storage/innobase/os/os0file.c:5097
#4  0x00000000004748d4 in fil_aio_wait (segment=8) at /home/glorch/dev/ps-5.5/xb-2.1/Percona-Server-5.5/storage/innobase/fil/fil0fil.c:5701
#5  0x0000000000409b78 in io_handler_thread (arg=<value optimized out>) at xtrabackup.cc:2276
#6  0x000000391b007851 in start_thread () from /lib64/libpthread.so.0
#7  0x000000391a8e811d in clone () from /lib64/libc.so.6

Thread 6 (Thread 0x7fcc9e1fc700 (LWP 10900)):
#0  0x000000391b00b43c in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
#1  0x00000000004af679 in os_cond_wait (event=0x216fbb0, reset_sig_count=1) at /home/glorch/dev/ps-5.5/xb-2.1/Percona-Server-5.5/storage/innobase/os/os0sync.c:207
#2  os_event_wait_low (event=0x216fbb0, reset_sig_count=1) at /home/glorch/dev/ps-5.5/xb-2.1/Percona-Server-5.5/storage/innobase/os/os0sync.c:609
#3  0x00000000004add69 in os_aio_simulated_handle (global_segment=9, message1=0x7fcc9e1fbe68, message2=0x7fcc9e1fbe60, type=0x7fcc9e1fbe58, space_id=0x7fcc9e1fbe50) at /home/glorch/dev/ps-5.5/xb-2.1/Percona-Server-5.5/storage/innobase/os/os0file.c:5097
#4  0x00000000004748d4 in fil_aio_wait (segment=9) at /home/glorch/dev/ps-5.5/xb-2.1/Percona-Server-5.5/storage/innobase/fil/fil0fil.c:5701
#5  0x0000000000409b78 in io_handler_thread (arg=<value optimized out>) at xtrabackup.cc:2276
#6  0x000000391b007851 in start_thread () from /lib64/libpthread.so.0
#7  0x000000391a8e811d in clone () from /lib64/libc.so.6

Thread 5 (Thread 0x7fcc9d6fa700 (LWP 10901)):
#0  0x000000391b00b7bb in pthread_cond_timedwait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
#1  0x00000000004af533 in os_cond_wait_timed (event=0x2173eb0, time_in_usec=1000000, reset_sig_count=1) at /home/glorch/dev/ps-5.5/xb-2.1/Percona-Server-5.5/storage/innobase/os/os0sync.c:171
#2  os_event_wait_time_low (event=0x2173eb0, time_in_usec=1000000, reset_sig_count=1) at /home/glorch/dev/ps-5.5/xb-2.1/Percona-Server-5.5/storage/innobase/os/os0sync.c:716
#3  0x000000000040c762 in log_copying_thread (arg=<value optimized out>) at xtrabackup.cc:2199
#4  0x000000391b007851 in start_thread () from /lib64/libpthread.so.0
#5  0x000000391a8e811d in clone () from /lib64/libc.so.6

Thread 4 (Thread 0x7fcca727d700 (LWP 10892)):
#0  0x000000391b00b43c in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
#1  0x00000000004af679 in os_cond_wait (event=0x216f7b0, reset_sig_count=1) at /home/glorch/dev/ps-5.5/xb-2.1/Percona-Server-5.5/storage/innobase/os/os0sync.c:207
#2  os_event_wait_low (event=0x216f7b0, reset_sig_count=1) at /home/glorch/dev/ps-5.5/xb-2.1/Percona-Server-5.5/storage/innobase/os/os0sync.c:609
#3  0x00000000004add69 in os_aio_simulated_handle (global_segment=1, message1=0x7fcca727ce68, message2=0x7fcca727ce60, type=0x7fcca727ce58, space_id=0x7fcca727ce50) at /home/glorch/dev/ps-5.5/xb-2.1/Percona-Server-5.5/storage/innobase/os/os0file.c:5097
#4  0x00000000004748d4 in fil_aio_wait (segment=1) at /home/glorch/dev/ps-5.5/xb-2.1/Percona-Server-5.5/storage/innobase/fil/fil0fil.c:5701
#5  0x0000000000409b78 in io_handler_thread (arg=<value optimized out>) at xtrabackup.cc:2276
#6  0x000000391b007851 in start_thread () from /lib64/libpthread.so.0
#7  0x000000391a8e811d in clone () from /lib64/libc.so.6

Thread 3 (Thread 0x7fcca547a700 (LWP 10895)):
#0  0x000000391b00b43c in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
#1  0x00000000004af679 in os_cond_wait (event=0x216f930, reset_sig_count=1) at /home/glorch/dev/ps-5.5/xb-2.1/Percona-Server-5.5/storage/innobase/os/os0sync.c:207
#2  os_event_wait_low (event=0x216f930, reset_sig_count=1) at /home/glorch/dev/ps-5.5/xb-2.1/Percona-Server-5.5/storage/innobase/os/os0sync.c:609
#3  0x00000000004add69 in os_aio_simulated_handle (global_segment=4, message1=0x7fcca5479e68, message2=0x7fcca5479e60, type=0x7fcca5479e58, space_id=0x7fcca5479e50) at /home/glorch/dev/ps-5.5/xb-2.1/Percona-Server-5.5/storage/innobase/os/os0file.c:5097
#4  0x00000000004748d4 in fil_aio_wait (segment=4) at /home/glorch/dev/ps-5.5/xb-2.1/Percona-Server-5.5/storage/innobase/fil/fil0fil.c:5701
#5  0x0000000000409b78 in io_handler_thread (arg=<value optimized out>) at xtrabackup.cc:2276
#6  0x000000391b007851 in start_thread () from /lib64/libpthread.so.0
#7  0x000000391a8e811d in clone () from /lib64/libc.so.6

Thread 2 (Thread 0x7fcca7e6e720 (LWP 10889)):
#0  0x000000391a8ac3bd in nanosleep () from /lib64/libc.so.6
#1  0x000000391a8e1574 in usleep () from /lib64/libc.so.6
#2  0x000000000040d462 in xtrabackup_backup_func () at xtrabackup.cc:3163
#3  0x0000000000411271 in main (argc=0, argv=0x213e938) at xtrabackup.cc:5778

Thread 1 (Thread 0x7fcc9ccf9700 (LWP 10902)):
#0  0x000000391a8328a5 in raise () from /lib64/libc.so.6
#1  0x000000391a834085 in abort () from /lib64/libc.so.6
#2  0x00000000004ab4ad in os_file_read_func (file=8, buf=0x7fcc98004000, offset=0, offset_high=0, n=1048576, trx=0x0) at /home/glorch/dev/ps-5.5/xb-2.1/Percona-Server-5.5/storage/innobase/os/os0file.c:2625
#3  0x0000000000416ade in pfs_os_file_read_func (cursor=0x7fcc9ccf86a0) at /home/glorch/dev/ps-5.5/xb-2.1/Percona-Server-5.5/storage/innobase/include/os0file.ic:284
#4  xb_fil_cur_read (cursor=0x7fcc9ccf86a0) at fil_cur.cc:233
#5  0x000000000040acf8 in xtrabackup_copy_datafile (node=<value optimized out>, thread_n=1) at xtrabackup.cc:1915
#6  0x000000000040b00a in data_copy_thread_func (arg=0x2178230) at xtrabackup.cc:2316
#7  0x000000391b007851 in start_thread () from /lib64/libpthread.so.0
#8  0x000000391a8e811d in clone () from /lib64/libc.so.6