Don't log exceptions for GreenletExit and thread_done

1) Greenletexit is normal so don't log it.

2) logging in a linked callback is just asking for problems.
   (we don't want to cause a context switch in this callback).

Change-Id: Ia9bb1cabc65a742fc49beb379548eb680b326e58

1 files changed, 12 insertions, 11 deletions

diff --git a/openstack/common/threadgroup.py b/openstack/common/threadgroup.py
index ebc066a..9d2f0b6 100644
--- a/openstack/common/threadgroup.py
+++ b/openstack/common/threadgroup.py
@@ -13,10 +13,8 @@
 #    WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 #    License for the specific language governing permissions and limitations
 #    under the License.
-import os
-import sys
 
-from eventlet import event
+from eventlet import greenlet
 from eventlet import greenpool
 from eventlet import greenthread
 
@@ -29,7 +27,11 @@ LOG = logging.getLogger(__name__)
 
 
 def _thread_done(gt, *args, **kwargs):
-    args[0].thread_done(args[1])
+    '''
+    Callback function to be passed to GreenThread.link() when we spawn()
+    Calls the ThreadGroup to notify if.
+    '''
+    kwargs['group'].thread_done(kwargs['thread'])
 
 
 class Thread(object):
@@ -42,7 +44,7 @@ class Thread(object):
     def __init__(self, name, thread, group):
         self.name = name
         self.thread = thread
-        self.thread.link(_thread_done, group, self)
+        self.thread.link(_thread_done, group=group, thread=self)
 
     def stop(self):
         self.thread.cancel()
@@ -77,12 +79,7 @@ class ThreadGroup():
         self.threads.append(th)
 
     def thread_done(self, thread):
-        try:
-            thread.wait()
-        except Exception as ex:
-            LOG.exception(ex)
-        finally:
-            self.threads.remove(thread)
+        self.threads.remove(thread)
 
     def stop(self):
         current = greenthread.getcurrent()
@@ -106,6 +103,8 @@ class ThreadGroup():
         for x in self.timers:
             try:
                 x.wait()
+            except greenlet.GreenletExit:
+                pass
             except Exception as ex:
                 LOG.exception(ex)
         current = greenthread.getcurrent()
@@ -114,5 +113,7 @@ class ThreadGroup():
                 continue
             try:
                 x.wait()
+            except greenlet.GreenletExit:
+                pass
             except Exception as ex:
                 LOG.exception(ex)