# Elasticsearch client link problem

**URL:** <https://discuss.elastic.co/t/elasticsearch-client-link-problem/193430>\
**Category:** Elasticsearch\
**Created:** [August 2, 2019, 1:54am UTC](https://discuss.elastic.co/t/elasticsearch-client-link-problem/193430 "2019-08-02T01:54:46Z")\
**Posts on this page:** 3\
**Page:** 1

<div class="post-metadata">

**Author:** ![JokerIry](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/jokeriry/32/51479_2.png) [@JokerIry](https://discuss.elastic.co/u/JokerIry)\
**Post date:** [August 2, 2019, 1:54am UTC](https://discuss.elastic.co/t/elasticsearch-client-link-problem/193430/1 "2019-08-02T01:54:47Z")

</div>

I use the ES version of 5.2.2, and when I look at my host point log, the error shown in the following log occurs several times every hour。

```auto
[2019-08-02T04:37:01,338][WARN][o.e.t.n.Netty4Transport] [nodeMaster] exception caught on transport layer [[id: 0x617ce2d4, L:/192.168.0.11:9300 - R:/192.168.0.25:22947]], closin
g connection
java.io.IOException: 连接超时
        at sun.nio.ch.FileDispatcherImpl.read0(Native Method) ~[?:?]
        at sun.nio.ch.SocketDispatcher.read(SocketDispatcher.java:39) ~[?:?]
        at sun.nio.ch.IOUtil.readIntoNativeBuffer(IOUtil.java:223) ~[?:?]
        at sun.nio.ch.IOUtil.read(IOUtil.java:197) ~[?:?]
        at sun.nio.ch.SocketChannelImpl.read(SocketChannelImpl.java:380) ~[?:?]
        at io.netty.buffer.PooledHeapByteBuf.setBytes(PooledHeapByteBuf.java:261) ~[netty-buffer-4.1.7.Final.jar:4.1.7.Final]
        at io.netty.buffer.AbstractByteBuf.writeBytes(AbstractByteBuf.java:1100) ~[netty-buffer-4.1.7.Final.jar:4.1.7.Final]
        at io.netty.channel.socket.nio.NioSocketChannel.doReadBytes(NioSocketChannel.java:366) ~[netty-transport-4.1.7.Final.jar:4.1.7.Final]
        at io.netty.channel.nio.AbstractNioByteChannel$NioByteUnsafe.read(AbstractNioByteChannel.java:118) [netty-transport-4.1.7.Final.jar:4.1.7.Final]
        at io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:642) [netty-transport-4.1.7.Final.jar:4.1.7.Final]
        at io.netty.channel.nio.NioEventLoop.processSelectedKeysPlain(NioEventLoop.java:527) [netty-transport-4.1.7.Final.jar:4.1.7.Final]
        at io.netty.channel.nio.NioEventLoop.processSelectedKeys(NioEventLoop.java:481) [netty-transport-4.1.7.Final.jar:4.1.7.Final]
        at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:441) [netty-transport-4.1.7.Final.jar:4.1.7.Final]
        at io.netty.util.concurrent.SingleThreadEventExecutor$5.run(SingleThreadEventExecutor.java:858) [netty-common-4.1.7.Final.jar:4.1.7.Final]
        at java.lang.Thread.run(Thread.java:745) [?:1.8.0_111]

```

I have been frantically printing this log around 5 am this morning.

---

<div class="post-metadata">

**Author:** ![spinscale](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/spinscale/32/25011_2.png) [@spinscale](https://discuss.elastic.co/u/spinscale)\
**Post date:** [August 2, 2019, 8:14am UTC](https://discuss.elastic.co/t/elasticsearch-client-link-problem/193430/2 "2019-08-02T08:14:34Z")

</div>

from the outside this looks like a network error, as the connection has timed out. Do you have any information if your network is experiencing instabilities?

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<div class="post-metadata">

**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\
**Post date:** [August 30, 2019, 8:14am UTC](https://discuss.elastic.co/t/elasticsearch-client-link-problem/193430/3 "2019-08-30T08:14:39Z")

</div>

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