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From "Hanauer, Arnulf, Vodacom South Africa (External)" <Arnulf.Hana...@vcontractor.co.za>
Subject Connection reset by peer
Date Wed, 12 Feb 2020 10:13:10 GMT
Hi Cassandra folks,

We are getting a lot of these errors and transactions are timing out and I was wondering if
this can be caused by Cassandra itself or if this is a genuine Linux network issue only. The
client job reports Cassandra node down after this occurs but I suspect this is due to the
connection failure - need some clarification as where to go look for a solution.


INFO  [epollEventLoopGroup-2-10] 2020-02-12 11:53:42,748 Message.java:623 - Unexpected exception
during request; channel = [id: 0x8a3e6831, L:/10.132.65.152:9042 - R:/10.132.11.15:48020]
io.netty.channel.unix.Errors$NativeIoException: syscall:read(...)() failed: Connection reset
by peer
        at io.netty.channel.unix.FileDescriptor.readAddress(...)(Unknown Source) ~[netty-all-4.0.44.Final.jar:4.0.44.Final]

INFO  [epollEventLoopGroup-2-15] 2020-02-12 11:42:46,871 Message.java:623 - Unexpected exception
during request; channel = [id: 0xa071f1c8, L:/10.132.65.152:9042 - R:/10.132.11.15:45134]
io.netty.channel.unix.Errors$NativeIoException: syscall:read(...)() failed: Connection reset
by peer
        at io.netty.channel.unix.FileDescriptor.readAddress(...)(Unknown Source) ~[netty-all-4.0.44.Final.jar:4.0.44.Final]


Source and Destination IP addresses are in the same DC (LAN).

I did recycle all the Cassandra services on all the nodes in both clusters but the problem
remains.

The only change made recently was the adding of replicas in the second DC for the keyspace
that is being written to when these messages occur (not had a chance to run a full repair
yet to sync the replicas)


FYI:
Cassandra 3.11.2
5 Node cluster each in 2 DC's


Kind regards
Arnulf Hanauer



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