[Avocado-devel] Broken sessions.

[Andrei Stepanov]

Hello

I need to find a solution to one problem.
Sometimes, ssh sessions to vms are terminated.
Different sessions, at different places.
I cannot find any explanation for this.
Today in the morning I got ~20 times of this error.
After a while it just disappeared.
I just was running the test again and again until it is successful.
The same VM, the same host, same test, same env. Errors are like:

2016-10-20 12:52:36,913 stacktrace       L0044 ERROR|     print_func)
2016-10-20 12:52:36,913 stacktrace       L0044 ERROR|   File
"/usr/lib/python2.7/site-packages/aexpect/client.py", line 1136, in
cmd_status_output
2016-10-20 12:52:36,913 stacktrace       L0044 ERROR|     o =
self.cmd_output(cmd, timeout, internal_timeout, print_func, safe)
2016-10-20 12:52:36,913 stacktrace       L0044 ERROR|   File
"/usr/lib/python2.7/site-packages/aexpect/client.py", line 1059, in
cmd_output
2016-10-20 12:52:36,914 stacktrace       L0044 ERROR|     raise
ShellProcessTerminatedError(cmd, e.status, o)
2016-10-20 12:52:36,914 stacktrace       L0044 ERROR|
ShellProcessTerminatedError: Shell process terminated while waiting for
command to complete: 'export DISPLAY=:0.0'    (status: 255,    output:
'Write failed: Broken pipe\n')


OR


2016-10-20 12:44:09,573 stacktrace       L0044 ERROR| ShellStatusError:
Could not get exit status of command: "ss -x src '*X11-unix*' | grep -q -s
X11"    (output: '')
2016-10-20 12:44:09,573 stacktrace       L0045 ERROR|
2016-10-20 12:44:09,574 test             L0572 ERROR| Traceback (most
recent call last):
2016-10-20 12:44:09,574 test             L0572 ERROR|   File
"/mnt/tests/spice/qe-tests/avocado-vt/avocado_vt/test.py", line 434, in
_run_avocado
    raise test_exception
2016-10-20 12:44:09,574 test             L0572 ERROR| ShellStatusError:
Could not get exit status of command: "ss -x src '*X11-unix*' | grep -q -s
X11"    (output: '')
2016-10-20 12:44:09,574 test             L0589 ERROR| ERROR
1-rv_connect_fail.172936.req__ss__password__on -> ShellStatusError: Could
not get exit status of command: "ss -x src '*X11-unix*' | grep -q -s X11"
 (output: '')



OR


2016-10-20 12:20:05,707 stacktrace       L0044 ERROR|   File
"/usr/lib/python2.7/site-packages/aexpect/client.py", line 1059, in
cmd_output
2016-10-20 12:20:05,707 stacktrace       L0044 ERROR|     raise
ShellProcessTerminatedError(cmd, e.status, o)
2016-10-20 12:20:05,707 stacktrace       L0044 ERROR|
ShellProcessTerminatedError: Shell process terminated while waiting for
command to complete: 'true 1>/var/tmp/tmp1SwO8Q 2>/var/tmp/tmpVN1k3u'
 (status: 255,    output: 'Write failed: Broken pipe\n')
2016-10-20 12:20:05,707 stacktrace       L0045 ERROR|
2016-10-20 12:20:05,708 test             L0572 ERROR| Traceback (most
recent call last):
2016-10-20 12:20:05,708 test             L0572 ERROR|   File
"/mnt/tests/spice/qe-tests/avocado-vt/avocado_vt/test.py", line 434, in
_run_avocado
    raise test_exception
2016-10-20 12:20:05,708 test             L0572 ERROR|
ShellProcessTerminatedError: Shell process terminated while waiting for
command to complete: 'true 1>/var/tmp/tmp1SwO8Q 2>/var/tmp/tmpVN1k3u'
 (status: 255,    output: 'Write failed: Broken pipe\n')


I tried to stop vm and login from host to VM manually - always successful.
Next 20 iterations of this test are successful.

Sometimes it is really annoying.

Any suggestions ?
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