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Type: Bug
Resolution: Unresolved
Priority: Major
Fix Version/s: None
Affects Version/s: 8.0.0.Beta
Component/s: mod_cluster, Undertow
Labels:
- deferred_8_0

Blocked:
False
Blocked Reason:
None
Ready:
False
CDW devel_ack:
CDW docs_ack:
CDW pm_ack:
CDW qa_ack:
CDW release:
Release Note Type:
Known Issue
Target Release:

8.0.z.GA
Test Coverage:

+
Intelligence Requested:
Market:

SFDC Cases Counter:
SFDC Cases Open:
SFDC Cases Links:

Following exceptions are printed in mod_cluster balancer log after workers are killed:

17:41:31,533 ERROR [io.undertow.client] (default I/O-2) UT005001: An exception occurred processing the request: java.io.IOException: An existing connection was forcibly closed by the remote host
	at java.base/sun.nio.ch.SocketDispatcher.read0(Native Method)
	at java.base/sun.nio.ch.SocketDispatcher.read(SocketDispatcher.java:43)
	at java.base/sun.nio.ch.IOUtil.readIntoNativeBuffer(IOUtil.java:276)
	at java.base/sun.nio.ch.IOUtil.read(IOUtil.java:233)
	at java.base/sun.nio.ch.IOUtil.read(IOUtil.java:223)
	at java.base/sun.nio.ch.SocketChannelImpl.read(SocketChannelImpl.java:358)
	at org.jboss.xnio.nio@3.8.8.Final-redhat-00001//org.xnio.nio.NioSocketConduit.read(NioSocketConduit.java:289)
	at io.undertow.core@2.3.4.Final//io.undertow.conduits.IdleTimeoutConduit.read(IdleTimeoutConduit.java:202)
	at org.jboss.xnio@3.8.8.Final-redhat-00001//org.xnio.conduits.ConduitStreamSourceChannel.read(ConduitStreamSourceChannel.java:127)
	at io.undertow.core@2.3.4.Final//io.undertow.server.protocol.framed.AbstractFramedChannel.receive(AbstractFramedChannel.java:383)
	at io.undertow.core@2.3.4.Final//io.undertow.client.ajp.AjpClientConnection$ClientReceiveListener.handleEvent(AjpClientConnection.java:360)
	at io.undertow.core@2.3.4.Final//io.undertow.client.ajp.AjpClientConnection$ClientReceiveListener.handleEvent(AjpClientConnection.java:356)
	at org.jboss.xnio@3.8.8.Final-redhat-00001//org.xnio.ChannelListeners.invokeChannelListener(ChannelListeners.java:92)
	at io.undertow.core@2.3.4.Final//io.undertow.server.protocol.framed.AbstractFramedChannel$FrameReadListener.handleEvent(AbstractFramedChannel.java:959)
	at io.undertow.core@2.3.4.Final//io.undertow.server.protocol.framed.AbstractFramedChannel$FrameReadListener.handleEvent(AbstractFramedChannel.java:939)
	at org.jboss.xnio@3.8.8.Final-redhat-00001//org.xnio.ChannelListeners.invokeChannelListener(ChannelListeners.java:92)
	at org.jboss.xnio@3.8.8.Final-redhat-00001//org.xnio.conduits.ReadReadyHandler$ChannelListenerHandler.readReady(ReadReadyHandler.java:66)
	at org.jboss.xnio.nio@3.8.8.Final-redhat-00001//org.xnio.nio.NioSocketConduit.handleReady(NioSocketConduit.java:89)
	at org.jboss.xnio.nio@3.8.8.Final-redhat-00001//org.xnio.nio.WorkerThread.run(WorkerThread.java:591)
17:41:31,540 ERROR [io.undertow.client] (default I/O-1) UT005001: An exception occurred processing the request: java.io.IOException: An existing connection was forcibly closed by the remote host
	at java.base/sun.nio.ch.SocketDispatcher.read0(Native Method)
	at java.base/sun.nio.ch.SocketDispatcher.read(SocketDispatcher.java:43)
	at java.base/sun.nio.ch.IOUtil.readIntoNativeBuffer(IOUtil.java:276)
	at java.base/sun.nio.ch.IOUtil.read(IOUtil.java:233)
	at java.base/sun.nio.ch.IOUtil.read(IOUtil.java:223)
	at java.base/sun.nio.ch.SocketChannelImpl.read(SocketChannelImpl.java:358)
	at org.jboss.xnio.nio@3.8.8.Final-redhat-00001//org.xnio.nio.NioSocketConduit.read(NioSocketConduit.java:289)
	at io.undertow.core@2.3.4.Final//io.undertow.conduits.IdleTimeoutConduit.read(IdleTimeoutConduit.java:202)
	at org.jboss.xnio@3.8.8.Final-redhat-00001//org.xnio.conduits.ConduitStreamSourceChannel.read(ConduitStreamSourceChannel.java:127)
	at io.undertow.core@2.3.4.Final//io.undertow.server.protocol.framed.AbstractFramedChannel.receive(AbstractFramedChannel.java:383)
	at io.undertow.core@2.3.4.Final//io.undertow.client.ajp.AjpClientConnection$ClientReceiveListener.handleEvent(AjpClientConnection.java:360)
	at io.undertow.core@2.3.4.Final//io.undertow.client.ajp.AjpClientConnection$ClientReceiveListener.handleEvent(AjpClientConnection.java:356)
	at org.jboss.xnio@3.8.8.Final-redhat-00001//org.xnio.ChannelListeners.invokeChannelListener(ChannelListeners.java:92)
	at io.undertow.core@2.3.4.Final//io.undertow.server.protocol.framed.AbstractFramedChannel$FrameReadListener.handleEvent(AbstractFramedChannel.java:959)
	at io.undertow.core@2.3.4.Final//io.undertow.server.protocol.framed.AbstractFramedChannel$FrameReadListener.handleEvent(AbstractFramedChannel.java:939)
	at org.jboss.xnio@3.8.8.Final-redhat-00001//org.xnio.ChannelListeners.invokeChannelListener(ChannelListeners.java:92)
	at org.jboss.xnio@3.8.8.Final-redhat-00001//org.xnio.conduits.ReadReadyHandler$ChannelListenerHandler.readReady(ReadReadyHandler.java:66)
	at org.jboss.xnio.nio@3.8.8.Final-redhat-00001//org.xnio.nio.NioSocketConduit.handleReady(NioSocketConduit.java:89)
	at org.jboss.xnio.nio@3.8.8.Final-redhat-00001//org.xnio.nio.WorkerThread.run(WorkerThread.java:591)

On workers side it looks like this:

#node1

17:41:31,540 WARN  [org.jgroups.blocks.cs.NioServer] (NioConnection.Reader [10.0.196.167:54301]-19,ejb,jboss-eap-8.0-1) failed handling message: java.io.IOException: An existing connection was forcibly closed by the remote host
	at java.base/sun.nio.ch.SocketDispatcher.read0(Native Method)
	at java.base/sun.nio.ch.SocketDispatcher.read(SocketDispatcher.java:43)
	at java.base/sun.nio.ch.IOUtil.readIntoNativeBuffer(IOUtil.java:276)
	at java.base/sun.nio.ch.IOUtil.read(IOUtil.java:245)
	at java.base/sun.nio.ch.IOUtil.read(IOUtil.java:223)
	at java.base/sun.nio.ch.SocketChannelImpl.read(SocketChannelImpl.java:358)
	at org.jgroups@5.2.13.Final-redhat-00001//org.jgroups.nio.Buffers.readLengthAndData(Buffers.java:128)
	at org.jgroups@5.2.13.Final-redhat-00001//org.jgroups.blocks.cs.NioConnection._receive(NioConnection.java:248)
	at org.jgroups@5.2.13.Final-redhat-00001//org.jgroups.blocks.cs.NioConnection$Reader._run(NioConnection.java:495)
	at org.jgroups@5.2.13.Final-redhat-00001//org.jgroups.blocks.cs.NioConnection$Reader.run(NioConnection.java:483)
	at org.wildfly.clustering.context@8.0.0.GA-redhat-20230327//org.wildfly.clustering.context.ContextReferenceExecutor.execute(ContextReferenceExecutor.java:49)
	at org.wildfly.clustering.context@8.0.0.GA-redhat-20230327//org.wildfly.clustering.context.ContextualExecutor$1.run(ContextualExecutor.java:78)
	at java.base/java.lang.Thread.run(Thread.java:834)

#node2

17:41:31,540 WARN  [org.jgroups.blocks.cs.NioServer] (NioConnection.Reader [10.0.196.167:54301]-17,ejb,jboss-eap-8.0-3) failed handling message: java.io.IOException: An existing connection was forcibly closed by the remote host
	at java.base/sun.nio.ch.SocketDispatcher.read0(Native Method)
	at java.base/sun.nio.ch.SocketDispatcher.read(SocketDispatcher.java:43)
	at java.base/sun.nio.ch.IOUtil.readIntoNativeBuffer(IOUtil.java:276)
	at java.base/sun.nio.ch.IOUtil.read(IOUtil.java:245)
	at java.base/sun.nio.ch.IOUtil.read(IOUtil.java:223)
	at java.base/sun.nio.ch.SocketChannelImpl.read(SocketChannelImpl.java:358)
	at org.jgroups@5.2.13.Final-redhat-00001//org.jgroups.nio.Buffers.readLengthAndData(Buffers.java:128)
	at org.jgroups@5.2.13.Final-redhat-00001//org.jgroups.blocks.cs.NioConnection._receive(NioConnection.java:248)
	at org.jgroups@5.2.13.Final-redhat-00001//org.jgroups.blocks.cs.NioConnection$Reader._run(NioConnection.java:495)
	at org.jgroups@5.2.13.Final-redhat-00001//org.jgroups.blocks.cs.NioConnection$Reader.run(NioConnection.java:483)
	at org.wildfly.clustering.context@8.0.0.GA-redhat-20230327//org.wildfly.clustering.context.ContextReferenceExecutor.execute(ContextReferenceExecutor.java:49)
	at org.wildfly.clustering.context@8.0.0.GA-redhat-20230327//org.wildfly.clustering.context.ContextualExecutor$1.run(ContextualExecutor.java:78)
	at java.base/java.lang.Thread.run(Thread.java:834)

relates to

JBEAP-17569 Unexpected UT005001 exception in log after node is killed in load balancing cluster on Windows

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