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https://issues.apache.org/jira/browse/CAMEL-11996?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Claus Ibsen updated CAMEL-11996:
--------------------------------
Affects Version/s: (was: 2.21.0)
> RabbitConsumer could hang when RabbitMQ connection is lost and autoAck=false.
> -----------------------------------------------------------------------------
>
> Key: CAMEL-11996
> URL: https://issues.apache.org/jira/browse/CAMEL-11996
> Project: Camel
> Issue Type: Bug
> Components: camel-rabbitmq
> Affects Versions: 2.18.0, 2.19.0, 2.20.0
> Reporter: Joel Mongård
> Fix For: 2.19.5, 2.20.1, 2.21.0
>
>
> When the connection is lost to a RabbitMQ server and later restored there is
> the possibility that the RabbitConsumer hangs. The only way around this that
> I found is to restart my application.
> I have experienced this problem in my testing environment running camel
> 2.18.3 where my RabbitMQ installation is not stable causing every consumer
> thread to hang on _lock.acquire()_ .
> The problem has been introduced in version 2.18.0 commit
> 7ee0977c9f5c327a95122f5b80202dc5dd872e40
> A possible fix could be to include the statement _if (!channel.isOpen())
> return;_ in the try-finally block below it.
> {code:title=JUnit test}
> package org.apache.camel.component.rabbitmq;
> import org.junit.Test;
> import org.mockito.Mockito;
> import com.rabbitmq.client.Channel;
> import com.rabbitmq.client.Connection;
> public class RabbitConsumerTest {
> private RabbitMQConsumer consumer = Mockito.mock(RabbitMQConsumer.class);
> private RabbitMQEndpoint endpoint = Mockito.mock(RabbitMQEndpoint.class);
> private Connection conn = Mockito.mock(Connection.class);
> private Channel channel = Mockito.mock(Channel.class);
>
> @Test(timeout=5000)
> public void testHandleDelivery_ShouldNotHangForeverIfChanelWasClosed()
> throws Exception {
> Mockito.when(consumer.getEndpoint()).thenReturn(endpoint);
> Mockito.when(consumer.getConnection()).thenReturn(conn);
> Mockito.when(conn.createChannel()).thenReturn(channel);
> Mockito.when(channel.isOpen()).thenReturn(false).thenReturn(true);
>
> RabbitConsumer rabbitConsumer = new RabbitConsumer(consumer);
>
> rabbitConsumer.handleDelivery(null, null, null, null);
> rabbitConsumer.handleDelivery(null, null, null, null);
> rabbitConsumer.stop();
> }
> }
> {code}
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