Created attachment 1094076 [details]
vdsm log from the source host

Description of problem:

Migration fails when using the jsonrpc client to start the migration:

2015-11-14 18:44:37,277 ERROR [virt.vm] (Thread-206) vmId=`b938182d-7f19-435b-9499-4cb8f1578e1b`::Failed to migrate [migration:310(run)]
Traceback (most recent call last):
  File "/usr/share/vdsm/virt/migration.py", line 294, in run
    self._startUnderlyingMigration(time.time())
  File "/usr/share/vdsm/virt/migration.py", line 331, in _startUnderlyingMigration
    result = self._destServer.migrationCreate(self._machineParams)
  File "/usr/lib/python2.7/site-packages/vdsm/jsonrpcvdscli.py", line 119, in migrationCreate
    params)
  File "/usr/lib/python2.7/site-packages/vdsm/jsonrpcvdscli.py", line 101, in _callMethod
    raise JsonRpcNoResponseError(method)
JsonRpcNoResponseError: [-32605] No response for JSON-RPC VM.migrationCreate request.

On the destination host, we do reply to the VM.migrationCreate:

jsonrpc.Executor/6::DEBUG::2015-11-14 18:44:37,261::API::590::vds::(migrationCreate) Destination VM creation succeeded
jsonrpc.Executor/6::DEBUG::2015-11-14 18:44:37,262::__init__::539::jsonrpc.JsonRpcServer::(_serveRequest) Return 'VM.migrationCreate' in bridge with {'migrationPort': 0, 'param
s': {'username': 'Unknown', 'acpiEnable': 'true', 'emulatedMachine': 'pc-i440fx-rhel7.1.0', 'afterMigrationStatus': u'', 'pid': '0', 'memGuaranteedSize': 512, 'transparentHugeP...

Looks like issue receiving the reply from the destination host.

Version-Release number of selected component (if applicable):
master

How reproducible:
Always

Steps to Reproduce:
1. Start 2 hosts using el 7.1 (updated today)
2. Start vm on host 1
3. Try to migrate to other host

Actual results:
Migration fails

Expected results:
Should succeed

Additional info:

Skipping the jsonrpc client for migration fix the migration:

# diff -u /root/src/vdsm/vdsm/virt/migration.py /usr/share/vdsm/virt/migration.py 
--- /root/src/vdsm/vdsm/virt/migration.py	2015-11-04 14:01:36.836210623 +0200
+++ /usr/share/vdsm/virt/migration.py	2015-11-14 18:57:57.866324608 +0200
@@ -140,6 +140,7 @@
         self.remoteHost, port = hostPort.rsplit(':', 1)
 
         try:
+            raise JsonRpcBindingsError()
             client = self._createClient(port)
             requestQueues = config.get('addresses', 'request_queues')
             requestQueue = requestQueues.split(",")[0]
@@ -147,7 +148,8 @@
             self.log.debug('Initiating connection with destination')
             self._destServer.ping()
 
-        except (JsonRpcBindingsError, JsonRpcNoResponseError):
+        except (JsonRpcBindingsError, JsonRpcNoResponseError) as e:
+            self.log.warning("Cannot use jsonrpc: %s, using xmlrpc", e)
             if config.getboolean('vars', 'ssl'):
                 self._destServer = vdscli.connect(
                     hostPort,

2015-11-14 18:59:39,659 INFO [virt.vm] (Thread-45) vmId=`b938182d-7f19-435b-9499-4cb8f1578e1b`::migration took 11 seconds to complete [migration:369(_startUnderlyingMigration)]