[jgroups-users] can failed connection attempts affect jgroups node?

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Hi,

One of our customers has a security tool that constantly tries to connect
to each server, so the jgroups logs have this happening every ~4 few
seconds:

2021-10-28 05:18:35 org.jgroups.protocols.TCP warn WARN: JGRP000006: failed
accepting connection from peer
java.io.EOFException
at java.io.DataInputStream.readFully(DataInputStream.java:197)
at
org.jgroups.blocks.cs.TcpConnection.readPeerAddress(TcpConnection.java:245)
at org.jgroups.blocks.cs.TcpConnection.<init>(TcpConnection.java:53)
at org.jgroups.blocks.cs.TcpServer$Acceptor.handleAccept(TcpServer.java:126)
at org.jgroups.blocks.cs.TcpServer$Acceptor.run(TcpServer.java:111)
at java.lang.Thread.run(Thread.java:748)

Can that affect the performance of jgroups? I see it on all nodes, but one
of their nodes, a primary database, when under load sometimes doesn't see
view changes that the other nodes see until a minute or more later. Since
the above happens on *every* node I'd think it's unrelated but wanted to
check. I know it's kind of a *qualitative* question, sorry.

This is with jgroups 4.1.8.Final using a TCP stack. Can get you the full
channel creation info if it helps.

Thanks,
Bobby

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<div dir=3D"ltr">Hi,<div><br></div><div>One of our customers has a security=
 tool that constantly tries to connect to each server, so the jgroups logs =
have this happening every ~4 few seconds:</div><div><br></div><div>2021-10-=
28 05:18:35 org.jgroups.protocols.TCP warn WARN: JGRP000006: failed accepti=
ng connection from peer<br>java.io.EOFException<br>	at java.io.DataInputStr=
eam.readFully(DataInputStream.java:197)<br>	at org.jgroups.blocks.cs.TcpCon=
nection.readPeerAddress(TcpConnection.java:245)<br>	at org.jgroups.blocks.c=
s.TcpConnection.&lt;init&gt;(TcpConnection.java:53)<br>	at org.jgroups.bloc=
ks.cs.TcpServer$Acceptor.handleAccept(TcpServer.java:126)<br>	at org.jgroup=
s.blocks.cs.TcpServer$Acceptor.run(TcpServer.java:111)<br>	at java.lang.Thr=
ead.run(Thread.java:748)<br></div><div><br></div><div>Can that affect the p=
erformance of jgroups? I see it on all nodes, but one of their nodes, a pri=
mary database, when under load sometimes doesn&#39;t see view changes that =
the other nodes see until a minute or more later. Since the above happens o=
n *every* node I&#39;d think it&#39;s unrelated but wanted to check. I know=
 it&#39;s kind of a *qualitative* question, sorry.</div><div><br></div><div=
>This is with jgroups=C2=A04.1.8.Final using a TCP stack. Can get you the f=
ull channel creation info if it helps.</div><div><br></div><div>Thanks,</di=
v><div>Bobby</div><div><br></div></div>

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