.
Thread 4 (Thread 5814):
#0  0x00ccf422 in __kernel_vsyscall ()
No symbol table info available.
#1  0x00f8fe15 in pthread_cond_wait@@GLIBC_2.3.2 ()
   from /lib/tls/i686/cmov/libpthread.so.0
No symbol table info available.
#2  0x002da48e in ?? () from /usr/lib/libisc.so.50
No symbol table info available.
#3  0x00f8b80e in start_thread () from /lib/tls/i686/cmov/libpthread.so.0
No symbol table info available.
#4  0x00e647ee in clone () from /lib/tls/i686/cmov/libc.so.6
No symbol table info available.
.
Thread 3 (Thread 5813):
#0  0x00ccf422 in __kernel_vsyscall ()
No symbol table info available.
#1  0x00f8fe15 in pthread_cond_wait@@GLIBC_2.3.2 ()
   from /lib/tls/i686/cmov/libpthread.so.0
No symbol table info available.
#2  0x002d7af9 in ?? () from /usr/lib/libisc.so.50
No symbol table info available.
#3  0x00f8b80e in start_thread () from /lib/tls/i686/cmov/libpthread.so.0
No symbol table info available.
#4  0x00e647ee in clone () from /lib/tls/i686/cmov/libc.so.6
No symbol table info available.
.
Thread 2 (Thread 5815):
#0  0x00ccf422 in __kernel_vsyscall ()
No symbol table info available.
#1  0x00e65066 in epoll_wait () from /lib/tls/i686/cmov/libc.so.6
No symbol table info available.
#2  0x002ec2e1 in ?? () from /usr/lib/libisc.so.50
No symbol table info available.
#3  0x00f8b80e in start_thread () from /lib/tls/i686/cmov/libpthread.so.0
No symbol table info available.
#4  0x00e647ee in clone () from /lib/tls/i686/cmov/libc.so.6
No symbol table info available.
.
Thread 1 (Thread 5715):
#0  0x00a172d0 in dns_rdatatype_fromtext () from /usr/lib/libdns.so.50
No symbol table info available.
#1  0x00455eec in ?? () from /usr/bin/host
No symbol table info available.
#2  0x00456330 in main () from /usr/bin/host
No symbol table info available.