task.ansible: catch failure log parse errors

If we fail to parse a failure log, fail silently and log the exception
so that we can inspect that log after the fact.

In this case a CommandFailedError will be raised.

Signed-off-by: Andrew Schoen <aschoen@redhat.com>

diff --git a/teuthology/task/ansible.py b/teuthology/task/ansible.py
index 046e364dcb833f99c47b496475f2faeda6d0bb84..c0712d589083e4555b57e97be00e9e82c10d7d08 100644 (file)
--- a/teuthology/task/ansible.py
+++ b/teuthology/task/ansible.py
@@ -263,7 +263,10 @@ class Ansible(Task):
     def _handle_failure(self, command, status):
         failures = None
         with open(self.failure_log.name, 'r') as log:
-            failures = yaml.safe_load(log)
+            try:
+                failures = yaml.safe_load(log)
+            except yaml.parser.ParserError:
+                log.exception("Failed to load failure log...")
 
         if failures:
             if self.ctx.archive: