[sheepdog-users] sheepdog(v0.9.1) cluster will crash when a node running sheep v0.7.9 want to join the cluster.

[redtone]

I run a sheepdog cluster with sheepdog v0.9.1 with zookeeper v3.4.6

When I run sheep command to add a node to the cluster, the cluster crashed.

Then I found the node's sheep version is v 0.7.9.

How to prohibit such issue ?

The following is the log message in sheep.log

Jan 19 20:58:24   INFO [main] zk_find_master(838) detect master leave, start
to compete master
Jan 19 20:58:56   INFO [main] zk_find_master(838) detect master leave, start
to compete master
Jan 19 20:59:28   INFO [main] zk_find_master(838) detect master leave, start
to compete master
Jan 19 20:59:28   INFO [main] zk_find_master(838) detect master leave, start
to compete master
Jan 19 20:59:28   INFO [main] zk_find_master(838) detect master leave, start
to compete master
Jan 19 21:00:00   INFO [main] zk_find_master(838) detect master leave, start
to compete master
Jan 19 21:00:00   INFO [main] zk_find_master(838) detect master leave, start
to compete master
Jan 19 21:00:32   INFO [main] zk_find_master(838) detect master leave, start
to compete master
Jan 19 21:00:32   INFO [main] zk_find_master(838) detect master leave, start
to compete master
Jan 19 21:00:32  EMERG [main] crash_handler(268) sheep exits unexpectedly
(Segmentation fault).
Jan 19 21:00:32  EMERG [main] sd_backtrace(833) sheep.c:270: crash_handler
Jan 19 21:00:32  EMERG [main] sd_backtrace(847)
/lib64/libpthread.so.0(+0xf70f) [0x7f9a1772a70f]
Jan 19 21:00:32  EMERG [main] sd_backtrace(847)
/lib64/libc.so.6(memcpy+0x3e6) [0x7f9a16d6ad46]
Jan 19 21:00:32  EMERG [main] sd_backtrace(847)
/lib/libzookeeper_mt.so.2(+0xc77c) [0x7f9a1728977c]
Jan 19 21:00:32  EMERG [main] sd_backtrace(847)
/lib/libzookeeper_mt.so.2(+0xdbbd) [0x7f9a1728abbd]
Jan 19 21:00:32  EMERG [main] sd_backtrace(847)
/lib/libzookeeper_mt.so.2(zoo_aset+0xdc) [0x7f9a17285cac]
Jan 19 21:00:32  EMERG [main] sd_backtrace(847)
/lib/libzookeeper_mt.so.2(zoo_set2+0x68) [0x7f9a17285e18]
Jan 19 21:00:32  EMERG [main] sd_backtrace(833) zookeeper.c:274: zk_set_data
Jan 19 21:00:32  EMERG [main] sd_backtrace(833) zookeeper.c:1252:
zk_event_handler
Jan 19 21:00:32  EMERG [main] sd_backtrace(833) event.c:210: do_event_loop
Jan 19 21:00:32  EMERG [main] sd_backtrace(833) sheep.c:963: main
Jan 19 21:00:32  EMERG [main] sd_backtrace(847)
/lib64/libc.so.6(__libc_start_main+0xfc) [0x7f9a16cffd1c]
Jan 19 21:00:32  EMERG [main] sd_backtrace(847) sheep() [0x404238]