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https://issues.apache.org/jira/browse/BEAM-2684?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16122193#comment-16122193
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Alex Filatov commented on BEAM-2684:
------------------------------------
I can reproduce the issue by commenting out Thread.sleep on line #74 or by
adding one on line #105.
{code}
org.apache.qpid.proton.messenger.impl.MessengerImpl processAllConnectors
SEVERE: Error processing connection
java.net.ConnectException: Connection refused
at sun.nio.ch.SocketChannelImpl.checkConnect(Native Method)
at
sun.nio.ch.SocketChannelImpl.finishConnect(SocketChannelImpl.java:717)
at
org.apache.qpid.proton.driver.impl.ConnectorImpl.process(ConnectorImpl.java:89)
at
org.apache.qpid.proton.messenger.impl.MessengerImpl.processAllConnectors(MessengerImpl.java:687)
at
org.apache.qpid.proton.messenger.impl.MessengerImpl.waitUntil(MessengerImpl.java:863)
at
org.apache.qpid.proton.messenger.impl.MessengerImpl.waitUntil(MessengerImpl.java:844)
at
org.apache.qpid.proton.messenger.impl.MessengerImpl.send(MessengerImpl.java:417)
at
org.apache.qpid.proton.messenger.impl.MessengerImpl.send(MessengerImpl.java:394)
at org.apache.beam.sdk.io.amqp.AmqpIOTest$1.run(AmqpIOTest.java:82)
{code}
Relevant bits of thread dump:
{code:java}
"direct-runner-worker" #15 prio=5 os_prio=31 tid=0x00007fd2c8270000 nid=0x5303
runnable [0x000070000aa00000]
java.lang.Thread.State: RUNNABLE
at sun.nio.ch.KQueueArrayWrapper.kevent0(Native Method)
at sun.nio.ch.KQueueArrayWrapper.poll(KQueueArrayWrapper.java:198)
at sun.nio.ch.KQueueSelectorImpl.doSelect(KQueueSelectorImpl.java:117)
at sun.nio.ch.SelectorImpl.lockAndDoSelect(SelectorImpl.java:86)
- locked <0x00000007404c0dd0> (a sun.nio.ch.Util$3)
- locked <0x00000007404c0dc0> (a java.util.Collections$UnmodifiableSet)
- locked <0x00000007404c0c20> (a sun.nio.ch.KQueueSelectorImpl)
at sun.nio.ch.SelectorImpl.select(SelectorImpl.java:97)
at sun.nio.ch.SelectorImpl.select(SelectorImpl.java:101)
at
org.apache.qpid.proton.driver.impl.DriverImpl.doWait(DriverImpl.java:81)
at
org.apache.qpid.proton.messenger.impl.MessengerImpl.waitUntil(MessengerImpl.java:894)
at
org.apache.qpid.proton.messenger.impl.MessengerImpl.waitUntil(MessengerImpl.java:844)
at
org.apache.qpid.proton.messenger.impl.MessengerImpl.recv(MessengerImpl.java:446)
at
org.apache.qpid.proton.messenger.impl.MessengerImpl.recv(MessengerImpl.java:451)
at
org.apache.beam.sdk.io.amqp.AmqpIO$UnboundedAmqpReader.advance(AmqpIO.java:330)
"Thread-1" #11 prio=5 os_prio=31 tid=0x00007fd2c7a4f000 nid=0x1407 runnable
[0x000070000a5f5000]
java.lang.Thread.State: RUNNABLE
at sun.nio.ch.KQueueArrayWrapper.kevent0(Native Method)
at sun.nio.ch.KQueueArrayWrapper.poll(KQueueArrayWrapper.java:198)
at sun.nio.ch.KQueueSelectorImpl.doSelect(KQueueSelectorImpl.java:117)
at sun.nio.ch.SelectorImpl.lockAndDoSelect(SelectorImpl.java:86)
- locked <0x000000074000aa98> (a sun.nio.ch.Util$3)
- locked <0x000000074000aaa8> (a java.util.Collections$UnmodifiableSet)
- locked <0x000000074000aa48> (a sun.nio.ch.KQueueSelectorImpl)
at sun.nio.ch.SelectorImpl.select(SelectorImpl.java:97)
at sun.nio.ch.SelectorImpl.select(SelectorImpl.java:101)
at
org.apache.qpid.proton.driver.impl.DriverImpl.doWait(DriverImpl.java:81)
at
org.apache.qpid.proton.messenger.impl.MessengerImpl.waitUntil(MessengerImpl.java:894)
at
org.apache.qpid.proton.messenger.impl.MessengerImpl.waitUntil(MessengerImpl.java:844)
at
org.apache.qpid.proton.messenger.impl.MessengerImpl.send(MessengerImpl.java:417)
at
org.apache.qpid.proton.messenger.impl.MessengerImpl.send(MessengerImpl.java:394)
at org.apache.beam.sdk.io.amqp.AmqpIOTest$1.run(AmqpIOTest.java:82)
{code}
I think root cause is a race between sender and receiver. In the peer-to-peer
mode (without a broker) receiver must be running before sender starts sending
messages. But when it's not the case sender seems to get stuck by suppressing
'Connection refused' exception and then waiting indefinitely for a connection
event on an invalid socket channel.
> AmqpIOTest is flaky
> -------------------
>
> Key: BEAM-2684
> URL: https://issues.apache.org/jira/browse/BEAM-2684
> Project: Beam
> Issue Type: Bug
> Components: sdk-java-extensions
> Reporter: Eugene Kirpichov
> Assignee: Jean-Baptiste Onofré
>
> This test is often timing out, and has been doing that for a while, causing
> unrelated PRs to fail randomly. I've gotten into the habit of excluding
> sdks/java/io/amqp when running "mvn verify" and I suppose it's not a good
> habit :)
> Example failure:
> https://builds.apache.org/job/beam_PreCommit_Java_MavenInstall/13424/console
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