zenoss 4.2.3 upgrade fail

Hi,

I installed the zenoss 4.2.3 rpm but zenoss doesn't work.

If I go to 127.0.0.1:8080 , I get a redirect to http://10.32.25.66:8080/zport/acl_users/cookieAuthHelper/login and I see the source as txt with the error

<div id="more_info">

    <div id="request_toggle" onclick="toggleReqBox()">View Error Details</div>

    <div id="request_box">

  <p>

      <strong>Type: &lt;class 'socket.error'&gt;

      </strong><br />

      <strong>Value: [Errno 104] Connection reset by peer

      </strong><br />

      <pre>Traceback (most recent call last):

  File "/opt/zenoss/lib/python/ZPublisher/Publish.py", line 134, in publish

    transactions_manager.commit()

  File "/opt/zenoss/lib/python/Zope2/App/startup.py", line 301, in commit

    transaction.commit()

  File "/opt/zenoss/lib/python/transaction/_manager.py", line 89, in commit

    return self.get().commit()

  File "/opt/zenoss/lib/python/transaction/_transaction.py", line 327, in commit

    self._callBeforeCommitHooks()

  File "/opt/zenoss/lib/python/transaction/_transaction.py", line 397, in _callBeforeCommitHooks

    hook(*args, **kws)

  File "/opt/zenoss/Products/ZenMessaging/queuemessaging/publisher.py", line 236, in beforeCompletionHook

    dataManager = AmqpDataManager(self._queuePublisher.channel, tx._manager)

  File "/opt/zenoss/Products/ZenMessaging/queuemessaging/publisher.py", line 396, in channel

    return self._client.getChannel()

  File "/opt/zenoss/lib/python/zenoss/protocols/amqp.py", line 69, in getChannel

    ssl=self._connectionInfo.usessl)

  File "/opt/zenoss/lib/python/amqplib/client_0_8/connection.py", line 144, in __init__

    (10, 30), # tune

  File "/opt/zenoss/lib/python/amqplib/client_0_8/abstract_channel.py", line 95, in wait

    self.channel_id, allowed_methods)

  File "/opt/zenoss/lib/python/amqplib/client_0_8/connection.py", line 202, in _wait_method

    self.method_reader.read_method()

  File "/opt/zenoss/lib/python/amqplib/client_0_8/method_framing.py", line 221, in read_method

    raise m

error: [Errno 104] Connection reset by peer

</pre>

  </p>

</div>

also, the event.log contains the error

2013-04-08T17:40:40 ERROR Zope.SiteErrorLog 1365435640.120.475256859915 http://10.32.25.66:8080/zport/acl_users/cookieAuthHelper/login

Traceback (innermost last):

  Module ZPublisher.Publish, line 134, in publish

  Module Zope2.App.startup, line 301, in commit

  Module transaction._manager, line 89, in commit

  Module transaction._transaction, line 327, in commit

  Module transaction._transaction, line 397, in _callBeforeCommitHooks

  Module Products.ZenMessaging.queuemessaging.publisher, line 236, in beforeCompletionHook

  Module Products.ZenMessaging.queuemessaging.publisher, line 396, in channel

  Module zenoss.protocols.amqp, line 69, in getChannel

  Module amqplib.client_0_8.connection, line 144, in __init__

  Module amqplib.client_0_8.abstract_channel, line 95, in wait

  Module amqplib.client_0_8.connection, line 202, in _wait_method

  Module amqplib.client_0_8.method_framing, line 221, in read_method

error: [Errno 104] Connection reset by peer

zeneventd.log:

2013-04-08 17:46:45,917 ERROR zen.maintenance: Maintenance failed. Message from hub: Could not publish message to RabbitMQ: [Errno 104] Connection reset by peer

2013-04-08 17:46:45,923 WARNING zen.protocols.twisted: Error authenticating to localhost as zenoss

zenhub.log:

2013-04-08 17:47:14,219 INFO zen.ZenHub: Worker (7609) reports 2013-04-08 17:47:14,219 ERROR zen.Events: Unable to publish event to <Products.ZenMessaging.queuemessaging.publisher.EventPublisher object at 0x5c230d0>

Traceback (most recent call last):

  File "/opt/zenoss/Products/ZenEvents/MySqlSendEvent.py", line 43, in sendEvents

    self._publishEvent(event, publisher)

  File "/opt/zenoss/Products/ZenEvents/MySqlSendEvent.py", line 89, in _publishEvent

    return self._sendHeartbeat(event)

  File "/opt/zenoss/Products/ZenEvents/MySqlSendEvent.py", line 107, in _sendHeartbeat

    publisher.publish('$Heartbeats', 'zenoss.heartbeat.%s' % heartbeat.monitor, heartbeat)

  File "/opt/zenoss/Products/ZenMessaging/queuemessaging/publisher.py", line 392, in publish

    headers=headers, declareExchange=declareExchange)

  File "/opt/zenoss/lib/python/zenoss/protocols/amqp.py", line 156, in publish

    raise Exception("Could not publish message to RabbitMQ: %s" % lastexc)

Exception: Could not publish message to RabbitMQ: [Errno 104] Connection reset by peer

etc etc etc

please help? My os is CentOS release 6.4, I use zenoss-4.2.3-1695.el6.x86_64 .