Hi Sanjeet, Thank you for providing the stack trace and details of your configuration. Setting Java System properties in custom code is not a safe or supported operation in NiFi. As you have observed, setting system properties alters the behavior of other components, leading to unexpected results.
If you need to support access through a proxy server, the ProxyConfigurationService interface and StandardProxyConfigurationService implementation provide a way to specify proxy server properties: https://nifi.apache.org/docs/nifi-docs/components/org.apache.nifi/nifi-proxy-configuration-nar/1.15.2/org.apache.nifi.proxy.StandardProxyConfigurationService/index.html Regards, David Handermann On Thu, Jan 13, 2022 at 12:39 PM sanjeet rath <rath.sanj...@gmail.com> wrote: > Hi, > > I encounter one "java.net.NoRouteToHostException: No route to host (Host > unreachable)" in *Nifi UI login page *. > The after debugging i realised when i am setting the proxy & port in > *System.setProperty("proxy address") & System.setProperty("port address") > *in > my custom processor. then this issue is appearing . > > The other way i also replicated when i am setting at the* jvm lable(in > bootstrap.conf file -Dhttp.proxyHost=address) *for nifi application this > exception is coming in nifi ui login page:, After removal of this argument > it works fine. > > Could someone help me to understand what could be the issue. > > Nifi version: 1.12.1 > cluster : 3 node (amazon EC2 linux cluster) > > *Detail exception from nifi-app.log:* > > o.a.n.c.c.h.r.ThreadPoolRequestReplicator Failed to replicate request GET > /nifi-api/flow/current-user to "exampledumyserveraddress" due to > java.net.NoRouteToHostException: No route to host (Host unreachable) > > 2022-01-13 12:57:23,722 WARN [Replicate Request Thread-5] > o.a.n.c.c.h.r.ThreadPoolRequestReplicator > > java.net.NoRouteToHostException: No route to host (Host unreachable) > > at java.base/java.net.PlainSocketImpl.socketConnect(Native Method) > > at > java.base/java.net > .AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:399) > > at > java.base/java.net > .AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:242) > > at > java.base/java.net > .AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:224) > > at > java.base/java.net.SocksSocketImpl.connect(SocksSocketImpl.java:403) > > at java.base/java.net.Socket.connect(Socket.java:609) > > at > okhttp3.internal.platform.Platform.connectSocket(Platform.java:130) > > at > > okhttp3.internal.connection.RealConnection.connectSocket(RealConnection.java:263) > > at > > okhttp3.internal.connection.RealConnection.connectTunnel(RealConnection.java:235) > > at > okhttp3.internal.connection.RealConnection.connect(RealConnection.java:177) > > at > > okhttp3.internal.connection.ExchangeFinder.findConnection(ExchangeFinder.java:224) > > at > > okhttp3.internal.connection.ExchangeFinder.findHealthyConnection(ExchangeFinder.java:108) > > at > okhttp3.internal.connection.ExchangeFinder.find(ExchangeFinder.java:88) > > at > okhttp3.internal.connection.Transmitter.newExchange(Transmitter.java:169) > > at > > okhttp3.internal.connection.ConnectInterceptor.intercept(ConnectInterceptor.java:41) > > at > > okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:142) > > at > > okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:117) > > at > okhttp3.internal.cache.CacheInterceptor.intercept(CacheInterceptor.java:94) > > at > > okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:142) > > at > > okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:117) > > at > > okhttp3.internal.http.BridgeInterceptor.intercept(BridgeInterceptor.java:93) > > at > > okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:142) > > at > > okhttp3.internal.http.RetryAndFollowUpInterceptor.intercept(RetryAndFollowUpInterceptor.java:88) > > at > > okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:142) > > at > > okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:117) > > at > okhttp3.RealCall.getResponseWithInterceptorChain(RealCall.java:229) > > at okhttp3.RealCall.execute(RealCall.java:81) > > at > > org.apache.nifi.cluster.coordination.http.replication.okhttp.OkHttpReplicationClient.replicate(OkHttpReplicationClient.java:132) > > at > > org.apache.nifi.cluster.coordination.http.replication.okhttp.OkHttpReplicationClient.replicate(OkHttpReplicationClient.java:126) > > at > > org.apache.nifi.cluster.coordination.http.replication.ThreadPoolRequestReplicator.replicateRequest(ThreadPoolRequestReplicator.java:647) > > at > > org.apache.nifi.cluster.coordination.http.replication.ThreadPoolRequestReplicator$NodeHttpRequest.run(ThreadPoolRequestReplicator.java:839) > > at > > java.base/java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:515) > > at > java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264) > > at > > java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128) > > at > > java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628) > > at java.base/java.lang.Thread.run(Thread.java:834) > > > > > > Thanks & Regards > -- > Sanjeet Kumar Rath, > mob- +91 8777577470 >
