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authorAravinda VK <avishwan@redhat.com>2016-05-24 14:13:29 +0530
committerAravinda VK <avishwan@redhat.com>2016-06-01 09:30:36 -0700
commit0e3b6f39924d8d1ef3b5fa57b5d38886b5d3626e (patch)
tree990960caff00ea063f75f37517fa166f03910b09 /geo-replication
parent1d28634b9aab65b08c1c2e9a6f48619c9fa494dc (diff)
geo-rep: Handle Worker kill gracefully if worker already died
If Agent dies for any reason, monitor tries to kill Worker also. But if worker is also died then kill command raises error ESRCH: No such process. [2016-05-23 16:49:33.903965] I [monitor(monitor):326:monitor] Monitor: Changelog Agent died, Aborting Worker(/bricks/brick0/master_brick0) [2016-05-23 16:49:33.904535] E [syncdutils(monitor):276:log_raise_exception] <top>: FAIL: Traceback (most recent call last): File "/usr/libexec/glusterfs/python/syncdaemon/syncdutils.py", line 306 in twrap tf(*aa) File "/usr/libexec/glusterfs/python/syncdaemon/monitor.py", line 393, in wmon slave_host, master) File "/usr/libexec/glusterfs/python/syncdaemon/monitor.py", line 327, in monitor os.kill(cpid, signal.SIGKILL) OSError: [Errno 3] No such process With this patch, monitor will gracefully handle if worker is already died. Change-Id: I3ae5f816a3a197343b64540cf46f5453167fb660 Signed-off-by: Aravinda VK <avishwan@redhat.com> BUG: 1341068 Reviewed-on: http://review.gluster.org/14512 Smoke: Gluster Build System <jenkins@build.gluster.com> NetBSD-regression: NetBSD Build System <jenkins@build.gluster.org> Reviewed-by: Kotresh HR <khiremat@redhat.com> CentOS-regression: Gluster Build System <jenkins@build.gluster.com> (cherry picked from commit 4f4a94a35a24d781f3f0e584a8cb59c019e50d6f) Reviewed-on: http://review.gluster.org/14562 Reviewed-by: Saravanakumar Arumugam <sarumuga@redhat.com>
Diffstat (limited to 'geo-replication')
-rw-r--r--geo-replication/syncdaemon/monitor.py18
1 files changed, 9 insertions, 9 deletions
diff --git a/geo-replication/syncdaemon/monitor.py b/geo-replication/syncdaemon/monitor.py
index 2b570a9..050218b 100644
--- a/geo-replication/syncdaemon/monitor.py
+++ b/geo-replication/syncdaemon/monitor.py
@@ -18,11 +18,11 @@ import xml.etree.ElementTree as XET
from subprocess import PIPE
from resource import Popen, FILE, GLUSTER, SSH
from threading import Lock
-from errno import ECHILD
+from errno import ECHILD, ESRCH
import re
import random
from gconf import gconf
-from syncdutils import select, waitpid
+from syncdutils import select, waitpid, errno_wrap
from syncdutils import set_term_handler, is_host_local, GsyncdError
from syncdutils import escape, Thread, finalize, memoize
@@ -187,7 +187,7 @@ class Monitor(object):
# standard handler
set_term_handler(lambda *a: set_term_handler())
# give a chance to graceful exit
- os.kill(-os.getpid(), signal.SIGTERM)
+ errno_wrap(os.kill, [-os.getpid(), signal.SIGTERM], [ESRCH])
def monitor(self, w, argv, cpids, agents, slave_vol, slave_host, master):
"""the monitor loop
@@ -324,7 +324,7 @@ class Monitor(object):
# Agent is died Kill Worker
logging.info("Changelog Agent died, "
"Aborting Worker(%s)" % w[0])
- os.kill(cpid, signal.SIGKILL)
+ errno_wrap(os.kill, [cpid, signal.SIGKILL], [ESRCH])
nwait(cpid)
nwait(apid)
@@ -348,7 +348,7 @@ class Monitor(object):
# Agent is died Kill Worker
logging.info("Changelog Agent died, Aborting "
"Worker(%s)" % w[0])
- os.kill(cpid, signal.SIGKILL)
+ errno_wrap(os.kill, [cpid, signal.SIGKILL], [ESRCH])
nwait(cpid)
nwait(apid)
break
@@ -357,7 +357,7 @@ class Monitor(object):
else:
logging.info("worker(%s) not confirmed in %d sec, "
"aborting it" % (w[0], conn_timeout))
- os.kill(cpid, signal.SIGKILL)
+ errno_wrap(os.kill, [cpid, signal.SIGKILL], [ESRCH])
nwait(apid) # wait for agent
ret = nwait(cpid)
if ret is None:
@@ -394,9 +394,9 @@ class Monitor(object):
time.sleep(1)
self.lock.acquire()
for cpid in cpids:
- os.kill(cpid, signal.SIGKILL)
+ errno_wrap(os.kill, [cpid, signal.SIGKILL], [ESRCH])
for apid in agents:
- os.kill(apid, signal.SIGKILL)
+ errno_wrap(os.kill, [apid, signal.SIGKILL], [ESRCH])
self.lock.release()
finalize(exval=1)
t = Thread(target=wmon, args=[wx])
@@ -464,7 +464,7 @@ def monitor(*resources):
# yes, send SIGSTOP to negative of monitor pid
# to go back to pause state.
if gconf.pause_on_start:
- os.kill(-os.getpid(), signal.SIGSTOP)
+ errno_wrap(os.kill, [-os.getpid(), signal.SIGSTOP], [ESRCH])
"""oh yeah, actually Monitor is used as singleton, too"""
return Monitor().multiplex(*distribute(*resources))