Unable to load workflows after updating KNIME Server and its executor

[armingrudd]

Hi,

I have updated KNIME Server from 4.11.2 to 4.11.4 and the executor from 4.2.2 to 4.2.4 but now when I select a workflow in webportal, I get this message:

Job wasn’t loaded within 1 minute. This usually happens if no executor is available. Please check back with your server administrator.

KNIME Server and the executor are updated successfully. I can run the executor manually and execute workflows but it seems KNIME Server cannot find it or something.

Using KNIME Server (Medium) on AWS Marketplace.

[armingrudd]

This is from the executor log file:

2021-01-01 07:35:46,681 : ERROR : AMQP Connection 127.0.0.1:5672 :  : RabbitMQHandler :  :  : Couldn't connect to message queue after 9 attempts: Connection refused (Connection refused)
java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:607)
	at com.rabbitmq.client.impl.SocketFrameHandlerFactory.create(SocketFrameHandlerFactory.java:60)
	at com.rabbitmq.client.impl.recovery.RecoveryAwareAMQConnectionFactory.newConnection(RecoveryAwareAMQConnectionFactory.java:62)
	at com.rabbitmq.client.impl.recovery.AutorecoveringConnection.init(AutorecoveringConnection.java:156)
	at com.rabbitmq.client.ConnectionFactory.newConnection(ConnectionFactory.java:1104)
	at com.rabbitmq.client.ConnectionFactory.newConnection(ConnectionFactory.java:1063)
	at com.rabbitmq.client.ConnectionFactory.newConnection(ConnectionFactory.java:885)
	at com.knime.enterprise.executor.msgq.RabbitMQHandler.createConnection(RabbitMQHandler.java:172)
	at com.knime.enterprise.executor.msgq.RabbitMQHandler.reconnect(RabbitMQHandler.java:206)
	at com.knime.enterprise.executor.msgq.MessageQueueShutdownListener.shutdownCompleted(MessageQueueShutdownListener.java:81)
	at com.rabbitmq.client.impl.ShutdownNotifierComponent.notifyListeners(ShutdownNotifierComponent.java:77)
	at com.rabbitmq.client.impl.AMQConnection.doFinalShutdown(AMQConnection.java:722)
	at com.rabbitmq.client.impl.AMQConnection$MainLoop.run(AMQConnection.java:611)
	at java.lang.Thread.run(Thread.java:748)

[armingrudd]

We just fixed the issue. So the topic can be closed.

[armingrudd]

Unable to load workflows after updating KNIME Server and its executor

Hi @rahul_kumar, We had the same issue and we could fix it. We are not sure how exactly it got fixed but here is what I can share with you: The main issue is: AMQP Connection 127.0.0.1:5672 : : RabbitMQHandler : : : Couldn't connect to message queue, retry to connect in 10000ms java.net.ConnectException: Connection refused (Connection refused) Which makes sense as that’s how the server and executor are communicating: What we did was check to see if anything was listening on the defaul…

[ScottF]

Glad you were able to fix it!