Getting continuous warning on my opensearch single node cluster.

[shubhammugale]

I am getting the below warning on my opensearch single node cluster. my opensarch version is 2.15.0, installed by the APT method. we are using self signed cert of our org.

was thrown by a user handler's exceptionCaught() method while handling the following exception:
io.netty.handler.codec.DecoderException: javax.net.ssl.SSLHandshakeException: Received fatal alert: certificate_unknown
at io.netty.handler.codec.ByteToMessageDecoder.callDecode(ByteToMessageDecoder.java:500) ~[netty-codec-4.1.110.Final.jar:4.1.110.Final]
at io.netty.handler.codec.ByteToMessageDecoder.channelRead(ByteToMessageDecoder.java:290) ~[netty-codec-4.1.110.Final.jar:4.1.110.Final]
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:444) [netty-transport-4.1.110.Final.jar:4.1.110.Final]
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:420) [netty-transport-4.1.110.Final.jar:4.1.110.Final]
at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:412) [netty-transport-4.1.110.Final.jar:4.1.110.Final]
at io.netty.channel.DefaultChannelPipeline$HeadContext.channelRead(DefaultChannelPipeline.java:1407) [netty-transport-4.1.110.Final.jar:4.1.110.Final]
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:440) [netty-transport-4.1.110.Final.jar:4.1.110.Final]
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:420) [netty-transport-4.1.110.Final.jar:4.1.110.Final]
at io.netty.channel.DefaultChannelPipeline.fireChannelRead(DefaultChannelPipeline.java:918) [netty-transport-4.1.110.Final.jar:4.1.110.Final]
at io.netty.channel.nio.AbstractNioByteChannel$NioByteUnsafe.read(AbstractNioByteChannel.java:166) [netty-transport-4.1.110.Final.jar:4.1.110.Final]
at io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:788) [netty-transport-4.1.110.Final.jar:4.1.110.Final]
at io.netty.channel.nio.NioEventLoop.processSelectedKeysPlain(NioEventLoop.java:689) [netty-transport-4.1.110.Final.jar:4.1.110.Final]
at io.netty.channel.nio.NioEventLoop.processSelectedKeys(NioEventLoop.java:652) [netty-transport-4.1.110.Final.jar:4.1.110.Final]
at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:562) [netty-transport-4.1.110.Final.jar:4.1.110.Final]
at io.netty.util.concurrent.SingleThreadEventExecutor$4.run(SingleThreadEventExecutor.java:994) [netty-common-4.1.110.Final.jar:4.1.110.Final]
at io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74) [netty-common-4.1.110.Final.jar:4.1.110.Final]
at java.base/java.lang.Thread.run(Thread.java:1583) [?:?]
Caused by: javax.net.ssl.SSLHandshakeException: Received fatal alert: certificate_unknown
at java.base/sun.security.ssl.Alert.createSSLException(Alert.java:130) ~[?:?]
at java.base/sun.security.ssl.Alert.createSSLException(Alert.java:117) ~[?:?]
at java.base/sun.security.ssl.TransportContext.fatal(TransportContext.java:365) ~[?:?]
at java.base/sun.security.ssl.Alert$AlertConsumer.consume(Alert.java:287) ~[?:?]
at java.base/sun.security.ssl.TransportContext.dispatch(TransportContext.java:204) ~[?:?]
at java.base/sun.security.ssl.SSLTransport.decode(SSLTransport.java:172) ~[?:?]
at java.base/sun.security.ssl.SSLEngineImpl.decode(SSLEngineImpl.java:736) ~[?:?]
at java.base/sun.security.ssl.SSLEngineImpl.readRecord(SSLEngineImpl.java:691) ~[?:?]
at java.base/sun.security.ssl.SSLEngineImpl.unwrap(SSLEngineImpl.java:506) ~[?:?]
at java.base/sun.security.ssl.SSLEngineImpl.unwrap(SSLEngineImpl.java:482) ~[?:?]
at java.base/javax.net.ssl.SSLEngine.unwrap(SSLEngine.java:679) ~[?:?]
at io.netty.handler.ssl.SslHandler$SslEngineType$3.unwrap(SslHandler.java:310) ~[netty-handler-4.1.110.Final.jar:4.1.110.Final]
at io.netty.handler.ssl.SslHandler.unwrap(SslHandler.java:1445) ~[netty-handler-4.1.110.Final.jar:4.1.110.Final]
at io.netty.handler.ssl.SslHandler.decodeJdkCompatible(SslHandler.java:1338) ~[netty-handler-4.1.110.Final.jar:4.1.110.Final]
at io.netty.handler.ssl.SslHandler.decode(SslHandler.java:1387) ~[netty-handler-4.1.110.Final.jar:4.1.110.Final]
at io.netty.handler.codec.ByteToMessageDecoder.decodeRemovalReentryProtection(ByteToMessageDecoder.java:530) ~[netty-codec-4.1.110.Final.jar:4.1.110.Final]
at io.netty.handler.codec.ByteToMessageDecoder.callDecode(ByteToMessageDecoder.java:469) ~[netty-codec-4.1.110.Final.jar:4.1.110.Final]
... 16 more

[sysadmind]

I'm not sure exactly how this relates to elasticsearch_exporter. Can you provide more context?