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https://issues.apache.org/jira/browse/IGNITE-24813?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=18049820#comment-18049820
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Pavel Tupitsyn commented on IGNITE-24813:
-----------------------------------------
https://github.com/apache/ignite-3/commit/d11e62b50f103218652a9cc4a15559b42b01e5d8
> Java thin: weird warning on server disconnect
> ---------------------------------------------
>
> Key: IGNITE-24813
> URL: https://issues.apache.org/jira/browse/IGNITE-24813
> Project: Ignite
> Issue Type: Bug
> Components: thin client
> Affects Versions: 3.0
> Reporter: Pavel Tupitsyn
> Assignee: Pavel Tupitsyn
> Priority: Major
> Labels: ignite-3
> Fix For: 3.2
>
> Time Spent: 0.5h
> Remaining Estimate: 0h
>
> In case of a server connection loss (node goes down, network issue, etc) the
> following warning appears in *client log*:
> {code}
> [2025-03-17T11:44:52,986][WARN
> ][nioEventLoopGroup-9-1][DefaultChannelPipeline] An exceptionCaught() event
> was fired, and it reached at the tail of the pipeline. It usually means the
> last handler in the pipeline did not handle the exception.
> java.net.SocketException: Connection reset
> at
> java.base/sun.nio.ch.SocketChannelImpl.throwConnectionReset(SocketChannelImpl.java:401)
> ~[?:?]
> at
> java.base/sun.nio.ch.SocketChannelImpl.read(SocketChannelImpl.java:434) ~[?:?]
> at io.netty.buffer.PooledByteBuf.setBytes(PooledByteBuf.java:255)
> ~[netty-buffer-4.1.119.Final.jar:4.1.119.Final]
> at
> io.netty.buffer.AbstractByteBuf.writeBytes(AbstractByteBuf.java:1132)
> ~[netty-buffer-4.1.119.Final.jar:4.1.119.Final]
> at io.netty.buffer.WrappedByteBuf.writeBytes(WrappedByteBuf.java:821)
> ~[netty-buffer-4.1.119.Final.jar:4.1.119.Final]
> at
> io.netty.buffer.AdvancedLeakAwareByteBuf.writeBytes(AdvancedLeakAwareByteBuf.java:636)
> ~[netty-buffer-4.1.119.Final.jar:4.1.119.Final]
> {code}
> Improve exception handling and log a better warning (which endpoint
> disconnected etc).
> Reproducer - add to ConnectionTest.java
> {code:java}
> public void testServerDisconnect() {
> var server = new TestServer(0, new FakeIgnite(), null, null, "abc",
> clusterId, null, 10800);
> var client = IgniteClient.builder()
> .addresses("localhost")
> .build();
> client.tables().tables();
> server.close();
> client.tables().tables();
> }
> {code}
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