# Exception caught on transport layer : javax.net.ssl.SSLHandshakeException: null cert chain **URL:** \ **Category:** Elasticsearch\ **Created:** [October 5, 2018, 7:25pm UTC](https://discuss.elastic.co/t/exception-caught-on-transport-layer-javax-net-ssl-sslhandshakeexception-null-cert-chain/151274 "2018-10-05T19:25:14Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![Vivek\_Bairy](https://avatars.discourse-cdn.com/v4/letter/v/cdc98d/32.png) [@Vivek\_Bairy](https://discuss.elastic.co/u/Vivek_Bairy)\ **Post date:** [October 5, 2018, 7:25pm UTC](https://discuss.elastic.co/t/exception-caught-on-transport-layer-javax-net-ssl-sslhandshakeexception-null-cert-chain/151274/1 "2018-10-05T19:25:14Z")
I have enabled TLS/SSL in 6.4.0 elastic instance. After installing self signed ca cert in my local work station, I can securely invoke elastic & kibana URLs. When trying to access transport.tcp port from my application, it is giving this error. Can you please help? **Here is x-pack config in elasticsearch.yml file:** xpack.security.enabled: true xpack.monitoring.enabled: true xpack.monitoring.collection.enabled: true xpack.ssl.key: certs/instance/instance.key xpack.ssl.certificate: certs/instance/instance.crt xpack.ssl.certificate\_authorities: certs/ca/ca.crt xpack.security.transport.ssl.enabled: true xpack.security.transport.ssl.verification\_mode: certificate xpack.security.transport.ssl.key: certs/instance/instance.key xpack.security.transport.ssl.certificate: certs/instance/instance.crt xpack.security.transport.ssl.certificate\_authorities: certs/ca/ca.crt xpack.security.http.ssl.enabled: true xpack.security.http.ssl.verification\_mode: certificate **Elasticsearch Logs:** [2018-10-05T15:07:52,639][WARN][o.e.x.s.t.n.SecurityNetty4ServerTransport] [dc1dvavsintap09] exception caught on transport layer [NettyTcpChannel{localAddress=0.0.0.0/0.0.0.0:9300, remoteAddress=/29.2.67.162:62133}], closing connection io.netty.handler.codec.DecoderException: javax.net.ssl.SSLHandshakeException: null cert chain at io.netty.handler.codec.ByteToMessageDecoder.callDecode(ByteToMessageDecoder.java:459) ~[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$5.run(SingleThreadEventExecutor.java:858) [netty-common-4.1.16.Final.jar:4.1.16.Final] at java.lang.Thread.run(Thread.java:745) [?:1.8.0\_111] Caused by: javax.net.ssl.SSLHandshakeException: null cert chain at sun.security.ssl.Handshaker.checkThrown(Handshaker.java:1431) ~[?:?] at sun.security.ssl.SSLEngineImpl.checkTaskThrown(SSLEngineImpl.java:535) ~[?:?] at sun.security.ssl.SSLEngineImpl.readNetRecord(SSLEngineImpl.java:813) ~[?:?] at sun.security.ssl.SSLEngineImpl.unwrap(SSLEngineImpl.java:781) ~[?:?] at javax.net.ssl.SSLEngine.unwrap(SSLEngine.java:624) ~[?:1.8.0\_111] at io.netty.handler.ssl.SslHandler$SslEngineType$3.unwrap(SslHandler.java:281) ~[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] ... 15 more Caused by: javax.net.ssl.SSLHandshakeException: null cert chain at sun.security.ssl.Alerts.getSSLException(Alerts.java:192) ~[?:?] at sun.security.ssl.SSLEngineImpl.fatal(SSLEngineImpl.java:1666) ~[?:?] at sun.security.ssl.Handshaker.fatalSE(Handshaker.java:304) ~[?:?] at sun.security.ssl.Handshaker.fatalSE(Handshaker.java:292) ~[?:?] at sun.security.ssl.ServerHandshaker.clientCertificate(ServerHandshaker.java:1865) ~[?:?] at sun.security.ssl.ServerHandshaker.processMessage(ServerHandshaker.java:230) ~[?:?] at sun.security.ssl.Handshaker.processLoop(Handshaker.java:979) ~[?:?] at sun.security.ssl.Handshaker$1.run(Handshaker.java:919) ~[?:?] at sun.security.ssl.Handshaker$1.run(Handshaker.java:916) ~[?:?] at java.security.AccessController.doPrivileged(Native Method) ~[?:1.8.0\_111] at sun.security.ssl.Handshaker$DelegatedTask.run(Handshaker.java:1369) ~[?:?] at io.netty.handler.ssl.SslHandler.runDelegatedTasks(SslHandler.java:1364) ~[netty-handler-4.1.16.Final.jar:4.1.16.Final] at io.netty.handler.ssl.SslHandler.unwrap(SslHandler.java:1272) ~[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] ... 15 more ---
**Author:** ![jaymode](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/jaymode/32/50103_2.png) [@jaymode](https://discuss.elastic.co/u/jaymode)\ **Post date:** [October 12, 2018, 9:55am UTC](https://discuss.elastic.co/t/exception-caught-on-transport-layer-javax-net-ssl-sslhandshakeexception-null-cert-chain/151274/2 "2018-10-12T09:55:17Z")
Did you configure your application with a certificate and key that is trusted by the Elasticsearch node(s)? ---
**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\ **Post date:** [November 9, 2018, 10:09am UTC](https://discuss.elastic.co/t/exception-caught-on-transport-layer-javax-net-ssl-sslhandshakeexception-null-cert-chain/151274/3 "2018-11-09T10:09:10Z")
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