...
at java.lang.Thread.run(Thread.java:748) [?:1.8.0_181]
[2018-08-23T02:40:37,613][WARN ][c.f.s.h.SearchGuardHttpServerTransport] [node1] caught exception while handling client http traffic, closing connection [id: 0x09b5e18c, L:
0.0.0.0/0.0.0.0:9java.lang.NullPointerException: ssl
at io.netty.internal.tcnative.SSL.getHandshakeCount(Native Method) ~[netty-tcnative-openssl-1.0.2-dynamic-2.0.7.Final-fedora-linux-x86_64.jar:2.0.7.Final]
at io.netty.handler.ssl.ReferenceCountedOpenSslEngine.rejectRemoteInitiatedRenegotiation(ReferenceCountedOpenSslEngine.java:1118) ~[netty-handler-4.1.16.Final.jar:4.1.16.Final]
at io.netty.handler.ssl.ReferenceCountedOpenSslEngine.unwrap(ReferenceCountedOpenSslEngine.java:1081) ~[netty-handler-4.1.16.Final.jar:4.1.16.Final]
at io.netty.handler.ssl.ReferenceCountedOpenSslEngine.unwrap(ReferenceCountedOpenSslEngine.java:1127) ~[netty-handler-4.1.16.Final.jar:4.1.16.Final]
at io.netty.handler.ssl.ReferenceCountedOpenSslEngine.unwrap(ReferenceCountedOpenSslEngine.java:1170) ~[netty-handler-4.1.16.Final.jar:4.1.16.Final]
at io.netty.handler.ssl.SslHandler$SslEngineType$1.unwrap(SslHandler.java:215) ~[netty-handler-4.1.16.Final.jar:4.1.16.Final]
at io.netty.handler.ssl.SslHandler.unwrap(SslHandler.java:1215) ~[netty-handler-4.1.16.Final.jar:4.1.16.Final]
at io.netty.handler.ssl.SslHandler.decodeJdkCompatible(SslHandler.java:1127) ~[netty-handler-4.1.16.Final.jar:4.1.16.Final]
at io.netty.handler.ssl.SslHandler.decode(SslHandler.java:1162) ~[netty-handler-4.1.16.Final.jar:4.1.16.Final]
at io.netty.handler.codec.ByteToMessageDecoder.decodeRemovalReentryProtection(ByteToMessageDecoder.java:489) ~[netty-codec-4.1.16.Final.jar:4.1.16.Final]
at io.netty.handler.codec.ByteToMessageDecoder.callDecode(ByteToMessageDecoder.java:428) ~[netty-codec-4.1.16.Final.jar:4.1.16.Final]
at io.netty.handler.codec.ByteToMessageDecoder.channelRead(ByteToMessageDecoder.java:265) ~[netty-codec-4.1.16.Final.jar:4.1.16.Final]
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:362) [netty-transport-4.1.16.Final.jar:4.1.16.Final]
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:348) [netty-transport-4.1.16.Final.jar:4.1.16.Final]
at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:340) [netty-transport-4.1.16.Final.jar:4.1.16.Final]
at io.netty.channel.DefaultChannelPipeline$HeadContext.channelRead(DefaultChannelPipeline.java:1359) [netty-transport-4.1.16.Final.jar:4.1.16.Final]
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:362) [netty-transport-4.1.16.Final.jar:4.1.16.Final]
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:348) [netty-transport-4.1.16.Final.jar:4.1.16.Final]
at io.netty.channel.DefaultChannelPipeline.fireChannelRead(DefaultChannelPipeline.java:935) [netty-transport-4.1.16.Final.jar:4.1.16.Final]
at io.netty.channel.nio.AbstractNioByteChannel$NioByteUnsafe.read(AbstractNioByteChannel.java:134) [netty-transport-4.1.16.Final.jar:4.1.16.Final]
at io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:645) [netty-transport-4.1.16.Final.jar:4.1.16.Final]
at io.netty.channel.nio.NioEventLoop.processSelectedKeysPlain(NioEventLoop.java:545) [netty-transport-4.1.16.Final.jar:4.1.16.Final]
at io.netty.channel.nio.NioEventLoop.processSelectedKeys(NioEventLoop.java:499) [netty-transport-4.1.16.Final.jar:4.1.16.Final]
at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:459) [netty-transport-4.1.16.Final.jar:4.1.16.Final]
at io.netty.util.concurrent.SingleThreadEventExecutor$5.run(SingleThreadEventExecutor.java:858) [netty-common-4.1.16.Final.jar:4.1.16.Final]
at java.lang.Thread.run(Thread.java:748) [?:1.8.0_181]
...
Was this due to the SSL was not set on client (filebeat) side? If so, how should we do?