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https://issues.apache.org/jira/browse/IGNITE-16741?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17613037#comment-17613037
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Aleksandr Polovtcev commented on IGNITE-16741:
----------------------------------------------
Sorry for the delay, but I've discussed this with other developers and we
decided that this problem should not be solved by Ignite itself, but rather by
external tools. If you are experiencing troubles with the Direct Buffer space
being exhausted, you can try setting a smaller socket buffer sizes in
{{ClientConnectorConfiguration}}
> DoS attacks on ignite ports
> ---------------------------
>
> Key: IGNITE-16741
> URL: https://issues.apache.org/jira/browse/IGNITE-16741
> Project: Ignite
> Issue Type: Bug
> Affects Versions: 2.11.1
> Reporter: biandeqiang
> Assignee: Aleksandr Polovtcev
> Priority: Critical
> Labels: ise
>
> DoS attacks on ignite's TcpCommunicationSpi and TcpDiscoverySpi's ports
> The ignite I use is embedded,ignite uses two ports, When I was testing a dos
> attack on the port, ignite had java.lang.OutOfMemoryError: Direct buffer
> memory.
> TcpDiscoverySpi spi = new TcpDiscoverySpi();
> spi.setLocalPort("port")
> TcpCommunicationSpi ipCom = new TcpCommunicationSpi();
> ipCom.setLocalPort("port")
>
> {{[2021-12-01 14:12:59,056][WARN
> ][0][0][grid-nio-worker-tcp-comm-4-#43%TcpCommunicationSpi%][ROOT][IgniteLoggerImp][88]
> Caught unhandled exception in NIO worker thread (restart the node).
> java.lang.OutOfMemoryError: Direct buffer memory
> at java.nio.Bits.reserveMemory(Bits.java:695)
> at java.nio.DirectByteBuffer.<init>(DirectByteBuffer.java:123)
> at java.nio.ByteBuffer.allocateDirect(ByteBuffer.java:311)
> at
> org.apache.ignite.internal.util.nio.GridNioServer$AbstractNioClientWorker.register(GridNioServer.java:2672)
> at
> org.apache.ignite.internal.util.nio.GridNioServer$AbstractNioClientWorker.bodyInternal(GridNioServer.java:2089)
> at
> org.apache.ignite.internal.util.nio.GridNioServer$AbstractNioClientWorker.body(GridNioServer.java:1910)
> at org.apache.ignite.internal.util.worker.GridWorker.run(GridWorker.java:120)
> at java.lang.Thread.run(Thread.java:748)}}
>
> I hope Ignite can also add MaxConnect as Tomcat and set a counter. If the
> counter exceeds the value, wait for several seconds.{{{}{}}}
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