I'm using a CentOS(CentOS release 6.4 (Final)) to upload data to cluster, the bandwidth reached to about 100MByte/s (and the net usage is full). Also, a redis(v=3.2.1) server (0.0.0.0:6379) running to maintain the uploading state. I run the redis-server at backend(not quit after SSH exited):
$ (redis-server redis.conf &)
By login the CentOS from another Linux (name jump-server), sometimes(not always happen, but often), the CentOS will close the SSH client:
Connection to <CentOS-ip> closed by remote host.
with -vvv option added for ssh -vvv root@centos-ip, I get more message when the connection closed by the server:
$ debug3: Wrote 64 bytes for a total of 11549
debug1: channel 0: free: client-session, nchannels 1
debug3: channel 0: status: The following connections are open:
#0 client-session (t4 r0 i0/0 o0/0 fd 4/5 cc -1)
debug3: channel 0: close_fds r 4 w 5 e 6
Connection to <CentOS-ip> closed by remote host.
Connection to <CentOS-ip> closed.
Transferred: sent 8520, received 82248 bytes, in 474.0 seconds
Bytes per second: sent 18.0, received 173.5
debug1: Exit status -1
and the redis-server also gone! I greped the redis.log (DBEUG level), there is no error or crash hint. And I started a sleepy process on the server:
# sleep.py
import time
while 1:
time.sleep(1)
# run as (python sleep.py &)
after SSH closed, the process gone too!
Why this happen? The messy truth is, all the process I started gone! why?
There may be a lot of reason lead this issue, please give me some hints, and I can supply other info to debug the issue if required. Thanks a lot.
