Ceph

(gdb) run -i 6 -c /etc/ceph/ceph.conf --mkfs --monmap monmap
Starting program: /usr/bin/cosd -i 6 -c /etc/ceph/ceph.conf --mkfs --monmap monmap
[Thread debugging using libthread_db enabled]
 ** WARNING: Ceph is still under heavy development, and is only suitable for **
 **          testing and review.  Do not trust it with important data.       **
terminate called after throwing an instance of 'ceph::buffer::end_of_buffer*'

Program received signal SIGABRT, Aborted.
0x00007ffff68c7a75 in raise () from /lib/libc.so.6
(gdb) bt
#0  0x00007ffff68c7a75 in raise () from /lib/libc.so.6
#1  0x00007ffff68cb5c0 in abort () from /lib/libc.so.6
#2  0x00007ffff717c8e5 in __gnu_cxx::__verbose_terminate_handler() () from /usr/lib/libstdc++.so.6
#3  0x00007ffff717ad16 in ?? () from /usr/lib/libstdc++.so.6
#4  0x00007ffff717ad43 in std::terminate() () from /usr/lib/libstdc++.so.6
#5  0x00007ffff717ae3e in __cxa_throw () from /usr/lib/libstdc++.so.6
#6  0x00000000005ca06f in MonMap::decode(ceph::buffer::list::iterator&) ()
#7  0x00000000005e5e9c in MonMap::decode (this=0x7fffffffdee8, fn=<value optimized out>) at mon/MonMap.h:165
#8  MonMap::read (this=0x7fffffffdee8, fn=<value optimized out>) at mon/MonMap.cc:26
#9  0x00000000005c3f1c in MonClient::build_initial_monmap (this=<value optimized out>) at mon/MonClient.cc:52
#10 0x000000000045715b in main (argc=<value optimized out>, argv=<value optimized out>) at cosd.cc:125

Although this is not really a bug, but just a stupid action of a sysadmin, it might be nice if there would be an error: "<file> is not a valid monmap!" instead of crashing like this.

By accident i pulled the map with "ceph osd getmap" instead of "ceph mon getmap".

Took me some time to find what i did wrong. I'm probably not going to be the last person to make this mistake.