2020-03-31T12:04:53.981Z WARN  [UdpTransport] receiveBufferSize (SO_RCVBUF) for input GELFUDPInput{title=FS1,
    type=org.graylog2.inputs.gelf.udp.GELFUDPInput, nodeId=null} (channel [id: 0x336b3172, L:/127.0.0.1:12201]) should be 262144 but is 425984.
2020-03-31T12:08:00.837Z WARN  [ProxiedResource] Unable to call https://172.20.82.132:9000/api/system/inputstates on node <95cfc9a2-3b2f-449f-b7b9-f386261e415b>
javax.net.ssl.SSLHandshakeException: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
        at sun.security.ssl.Alerts.getSSLException(Alerts.java:192) ~[?:1.8.0_242]
        at sun.security.ssl.SSLSocketImpl.fatal(SSLSocketImpl.java:1946) ~[?:1.8.0_242]
        at sun.security.ssl.Handshaker.fatalSE(Handshaker.java:316) ~[?:1.8.0_242]
        at sun.security.ssl.Handshaker.fatalSE(Handshaker.java:310) ~[?:1.8.0_242]
        at sun.security.ssl.ClientHandshaker.serverCertificate(ClientHandshaker.java:1639) ~[?:1.8.0_242]
        at sun.security.ssl.ClientHandshaker.processMessage(ClientHandshaker.java:223) ~[?:1.8.0_242]
        at sun.security.ssl.Handshaker.processLoop(Handshaker.java:1037) ~[?:1.8.0_242]
        at sun.security.ssl.Handshaker.process_record(Handshaker.java:965) ~[?:1.8.0_242]
        at sun.security.ssl.SSLSocketImpl.readRecord(SSLSocketImpl.java:1064) ~[?:1.8.0_242]
        at sun.security.ssl.SSLSocketImpl.performInitialHandshake(SSLSocketImpl.java:1367) ~[?:1.8.0_242]
        at sun.security.ssl.SSLSocketImpl.startHandshake(SSLSocketImpl.java:1395) ~[?:1.8.0_242]
        at sun.security.ssl.SSLSocketImpl.startHandshake(SSLSocketImpl.java:1379) ~[?:1.8.0_242]
        at okhttp3.internal.connection.RealConnection.connectTls(RealConnection.java:318) ~[graylog.jar:?]
        at okhttp3.internal.connection.RealConnection.establishProtocol(RealConnection.java:282) ~[graylog.jar:?]
        at okhttp3.internal.connection.RealConnection.connect(RealConnection.java:167) ~[graylog.jar:?]
        at okhttp3.internal.connection.StreamAllocation.findConnection(StreamAllocation.java:257) ~[graylog.jar:?]
        at okhttp3.internal.connection.StreamAllocation.findHealthyConnection(StreamAllocation.java:135) ~[graylog.jar:?]
        at okhttp3.internal.connection.StreamAllocation.newStream(StreamAllocation.java:114) ~[graylog.jar:?]
        at okhttp3.internal.connection.ConnectInterceptor.intercept(ConnectInterceptor.java:42) ~[graylog.jar:?]
        at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:147) ~[graylog.jar:?]
        at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:121) ~[graylog.jar:?]
        at okhttp3.internal.cache.CacheInterceptor.intercept(CacheInterceptor.java:93) ~[graylog.jar:?]
        at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:147) ~[graylog.jar:?]
at okhttp3.internal.http.BridgeInterceptor.intercept(BridgeInterceptor.java:93) ~[graylog.jar:?]
        at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:147) ~[graylog.jar:?]
        at okhttp3.internal.http.RetryAndFollowUpInterceptor.intercept(RetryAndFollowUpInterceptor.java:126) ~[graylog.jar:?]
        at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:147) ~[graylog.jar:?]
        at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:121) ~[graylog.jar:?]
        at org.graylog2.rest.RemoteInterfaceProvider.lambda$get$0(RemoteInterfaceProvider.java:61) ~[graylog.jar:?]
        at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:147) ~[graylog.jar:?]
        at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:121) ~[graylog.jar:?]
        at okhttp3.RealCall.getResponseWithInterceptorChain(RealCall.java:200) ~[graylog.jar:?]
        at okhttp3.RealCall.execute(RealCall.java:77) ~[graylog.jar:?]
        at retrofit2.OkHttpCall.execute(OkHttpCall.java:180) ~[graylog.jar:?]
        at org.graylog2.shared.rest.resources.ProxiedResource.lambda$getForAllNodes$0(ProxiedResource.java:78) ~[graylog.jar:?]
        at java.util.concurrent.FutureTask.run(FutureTask.java:266) [?:1.8.0_242]
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) [?:1.8.0_242]
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) [?:1.8.0_242]
        at java.lang.Thread.run(Thread.java:748) [?:1.8.0_242]
Caused by: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
        at sun.security.validator.PKIXValidator.doBuild(PKIXValidator.java:450) ~[?:1.8.0_242]
        at sun.security.validator.PKIXValidator.engineValidate(PKIXValidator.java:317) ~[?:1.8.0_242]
        at sun.security.validator.Validator.validate(Validator.java:262) ~[?:1.8.0_242]
        at sun.security.ssl.X509TrustManagerImpl.validate(X509TrustManagerImpl.java:330) ~[?:1.8.0_242]
        at sun.security.ssl.X509TrustManagerImpl.checkTrusted(X509TrustManagerImpl.java:237) ~[?:1.8.0_242]
        at sun.security.ssl.X509TrustManagerImpl.checkServerTrusted(X509TrustManagerImpl.java:132) ~[?:1.8.0_242]
        at sun.security.ssl.ClientHandshaker.serverCertificate(ClientHandshaker.java:1621) ~[?:1.8.0_242]
        ... 35 more
Caused by: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
        at sun.security.provider.certpath.SunCertPathBuilder.build(SunCertPathBuilder.java:141) ~[?:1.8.0_242]
        at sun.security.provider.certpath.SunCertPathBuilder.engineBuild(SunCertPathBuilder.java:126) ~[?:1.8.0_242]
        at java.security.cert.CertPathBuilder.build(CertPathBuilder.java:280) ~[?:1.8.0_242]
        at sun.security.validator.PKIXValidator.doBuild(PKIXValidator.java:445) ~[?:1.8.0_242]
        at sun.security.validator.PKIXValidator.engineValidate(PKIXValidator.java:317) ~[?:1.8.0_242]
        at sun.security.validator.Validator.validate(Validator.java:262) ~[?:1.8.0_242]
        at sun.security.ssl.X509TrustManagerImpl.validate(X509TrustManagerImpl.java:330) ~[?:1.8.0_242]
        at sun.security.ssl.X509TrustManagerImpl.checkTrusted(X509TrustManagerImpl.java:237) ~[?:1.8.0_242]
        at sun.security.ssl.X509TrustManagerImpl.checkServerTrusted(X509TrustManagerImpl.java:132) ~[?:1.8.0_242]
        at sun.security.ssl.ClientHandshaker.serverCertificate(ClientHandshaker.java:1621) ~[?:1.8.0_242]
        ... 35 more