Got another assertion when we redirect below testcase three times in to the server DROP DATABASE test;CREATE DATABASE test;USE test; create TABLE t0(i int,j int)ENGINE=innodb; FLUSH TABLES t0 FOR EXPORT; LOCK BINLOG FOR BACKUP; ** Testcase redirection command /ssd/ramesh/Percona-Server-5.6.21-rel70.0-693.Linux.x86_64/bin/mysql -A -uroot -S/ssd/ramesh/Percona-Server-5.6.21-rel70.0-693.Linux.x86_64/socket.sock test < testcase.sql *** GDB info ************ GDB +bt #0 0x00007f4ea139a771 in pthread_kill () from /lib64/libpthread.so.0 #1 0x000000000067679d in handle_fatal_signal (sig=11) at /mnt/workspace/percona-server-5.6-binaries-opt-yassl/label_exp/centos6-64/percona-server-5.6.21-70.0/sql/signal_handler.cc:236 #2 #3 operator() (this=, thr=...) at /mnt/workspace/percona-server-5.6-binaries-opt-yassl/label_exp/centos6-64/percona-server-5.6.21-70.0/extra/yassl/src/yassl_int.cpp:1722 #4 find_if::iterator, yaSSL::yassl_int_cpp_local2::thr_match> (pred=..., last=..., first=...) at /mnt/workspace/percona-server-5.6-binaries-opt-yassl/label_exp/centos6-64/percona-server-5.6.21-70.0/extra/yassl/taocrypt/mySTL/algorithm.hpp:68 #5 yaSSL::Errors::Remove (this=0x7f4de9022040) at /mnt/workspace/percona-server-5.6-binaries-opt-yassl/label_exp/centos6-64/percona-server-5.6.21-70.0/extra/yassl/src/yassl_int.cpp:1791 #6 0x00000000005ad824 in one_thread_per_connection_end (thd=0x7f4e04f84000, block_pthread=true) at /mnt/workspace/percona-server-5.6-binaries-opt-yassl/label_exp/centos6-64/percona-server-5.6.21-70.0/sql/mysqld.cc:2843 #7 0x00000000006cb346 in do_handle_one_connection (thd_arg=thd_arg@entry=0x7f4e10f23000) at /mnt/workspace/percona-server-5.6-binaries-opt-yassl/label_exp/centos6-64/percona-server-5.6.21-70.0/sql/sql_connect.cc:1546 #8 0x00000000006cb4b0 in handle_one_connection (arg=arg@entry=0x7f4e10f23000) at /mnt/workspace/percona-server-5.6-binaries-opt-yassl/label_exp/centos6-64/percona-server-5.6.21-70.0/sql/sql_connect.cc:1443 #9 0x0000000000af86d3 in pfs_spawn_thread (arg=0x7f4e10f393e0) at /mnt/workspace/percona-server-5.6-binaries-opt-yassl/label_exp/centos6-64/percona-server-5.6.21-70.0/storage/perfschema/pfs.cc:1860 #10 0x00007f4ea1395df3 in start_thread () from /lib64/libpthread.so.0 #11 0x00007f4ea005f01d in clone () from /lib64/libc.so.6 ************* Error key_buffer_size=8388608 read_buffer_size=131072 max_used_connections=1 max_threads=153 thread_count=1 connection_count=0 It is possible that mysqld could use up to key_buffer_size + (read_buffer_size + sort_buffer_size)*max_threads = 69184 K bytes of memory Hope that's ok; if not, decrease some variables in the equation. Thread pointer: 0x7f03a9f92000 Attempting backtrace. You can use the following information to find out where mysqld died. If you see no messages after this, something went terribly wrong... stack_bottom = 7f0446c30e40 thread_stack 0x40000 /ssd/ramesh/Percona-Server-5.6.21-rel70.0-693.Linux.x86_64/bin/mysqld(my_print_stacktrace+0x2c)[0x8e9f2c] /ssd/ramesh/Percona-Server-5.6.21-rel70.0-693.Linux.x86_64/bin/mysqld(handle_fatal_signal+0x461)[0x676831] /lib64/libpthread.so.0(+0xf130)[0x7f0446683130] /ssd/ramesh/Percona-Server-5.6.21-rel70.0-693.Linux.x86_64/bin/mysqld[0xbb7de0] /ssd/ramesh/Percona-Server-5.6.21-rel70.0-693.Linux.x86_64/bin/mysqld(_Z29one_thread_per_connection_endP3THDb+0x44)[0x5ad824] /ssd/ramesh/Percona-Server-5.6.21-rel70.0-693.Linux.x86_64/bin/mysqld(_Z24do_handle_one_connectionP3THD+0xe6)[0x6cb346] /ssd/ramesh/Percona-Server-5.6.21-rel70.0-693.Linux.x86_64/bin/mysqld(handle_one_connection+0x40)[0x6cb4b0] /ssd/ramesh/Percona-Server-5.6.21-rel70.0-693.Linux.x86_64/bin/mysqld(pfs_spawn_thread+0x143)[0xaf86d3] /lib64/libpthread.so.0(+0x7df3)[0x7f044667bdf3] /lib64/libc.so.6(clone+0x6d)[0x7f044534501d] Trying to get some variables. Some pointers may be invalid and cause the dump to abort. Query (0): Connection ID (thread ID): 3 Status: KILL_CONNECTION You may download the Percona Server operations manual by visiting http://www.percona.com/software/percona-server/. You may find information in the manual which will help you identify the cause of the crash. Writing a core file