java.net.UnknownHostException: blabla.bla

Java.net JIRA | adams74 | 2 years ago
  1. 0

    Misleading exception is raised once the Jersey client is called once the host with a non-existing, broken or unavailable url is passed in as a parameter for target method. There is no chance to establish connection to such the host but the client is reporting java.lang.IllegalStateException: Already connected instead of rather anticipated UnknownHostException or ConnectException. Example: class DigestRequest { } class DigestResponse { } public class DigestNoLimitClient { public static void main(String[] args) throws Exception { String host = "http://blabla.bla"; Client client = ClientBuilder.newClient(); Entity<DigestRequest> request = Entity.json(new DigestRequest()); Response response = client.target(host).request().post(request); DigestResponse responseObject = response.readEntity(DigestResponse.class); System.out.println(responseObject); } } Result: Exception in thread "main" javax.ws.rs.ProcessingException: Already connected at org.glassfish.jersey.client.ClientRuntime.invoke(ClientRuntime.java:255) at org.glassfish.jersey.client.JerseyInvocation$1.call(JerseyInvocation.java:667) at org.glassfish.jersey.client.JerseyInvocation$1.call(JerseyInvocation.java:664) at org.glassfish.jersey.internal.Errors.process(Errors.java:315) at org.glassfish.jersey.internal.Errors.process(Errors.java:297) at org.glassfish.jersey.internal.Errors.process(Errors.java:228) at org.glassfish.jersey.process.internal.RequestScope.runInScope(RequestScope.java:424) at org.glassfish.jersey.client.JerseyInvocation.invoke(JerseyInvocation.java:664) at org.glassfish.jersey.client.JerseyInvocation$Builder.method(JerseyInvocation.java:424) at org.glassfish.jersey.client.JerseyInvocation$Builder.post(JerseyInvocation.java:333) at net.adamsmolnik.client.DigestNoLimitClient.main(DigestNoLimitClient.java:43) Caused by: java.lang.IllegalStateException: Already connected at sun.net.www.protocol.http.HttpURLConnection.setRequestProperty(HttpURLConnection.java:3000) at org.glassfish.jersey.client.HttpUrlConnector.setOutboundHeaders(HttpUrlConnector.java:348) at org.glassfish.jersey.client.HttpUrlConnector.access$100(HttpUrlConnector.java:87) at org.glassfish.jersey.client.HttpUrlConnector$3.getOutputStream(HttpUrlConnector.java:311) at org.glassfish.jersey.message.internal.CommittingOutputStream.commitStream(CommittingOutputStream.java:200) at org.glassfish.jersey.message.internal.CommittingOutputStream.commitStream(CommittingOutputStream.java:194) at org.glassfish.jersey.message.internal.CommittingOutputStream.commit(CommittingOutputStream.java:262) at org.glassfish.jersey.message.internal.OutboundMessageContext.commitStream(OutboundMessageContext.java:811) at org.glassfish.jersey.client.ClientRequest.writeEntity(ClientRequest.java:546) at org.glassfish.jersey.client.HttpUrlConnector._apply(HttpUrlConnector.java:315) at org.glassfish.jersey.client.HttpUrlConnector.apply(HttpUrlConnector.java:227) at org.glassfish.jersey.client.ClientRuntime.invoke(ClientRuntime.java:246) Compare the behavior of code listed above with that showed below: String host = "http://blabla.bla"; HttpURLConnection con = (HttpURLConnection)new URL(host).openConnection(); con.setDoOutput(true); con.getOutputStream().write(1); You get the exception as expected: Exception in thread "main" java.net.UnknownHostException: blabla.bla at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:184) at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:172) at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392) at java.net.Socket.connect(Socket.java:589)

    Java.net JIRA | 2 years ago | adams74
    java.net.UnknownHostException: blabla.bla
  2. 0

    Misleading exception is raised once the Jersey client is called once the host with a non-existing, broken or unavailable url is passed in as a parameter for target method. There is no chance to establish connection to such the host but the client is reporting java.lang.IllegalStateException: Already connected instead of rather anticipated UnknownHostException or ConnectException. Example: class DigestRequest { } class DigestResponse { } public class DigestNoLimitClient { public static void main(String[] args) throws Exception { String host = "http://blabla.bla"; Client client = ClientBuilder.newClient(); Entity<DigestRequest> request = Entity.json(new DigestRequest()); Response response = client.target(host).request().post(request); DigestResponse responseObject = response.readEntity(DigestResponse.class); System.out.println(responseObject); } } Result: Exception in thread "main" javax.ws.rs.ProcessingException: Already connected at org.glassfish.jersey.client.ClientRuntime.invoke(ClientRuntime.java:255) at org.glassfish.jersey.client.JerseyInvocation$1.call(JerseyInvocation.java:667) at org.glassfish.jersey.client.JerseyInvocation$1.call(JerseyInvocation.java:664) at org.glassfish.jersey.internal.Errors.process(Errors.java:315) at org.glassfish.jersey.internal.Errors.process(Errors.java:297) at org.glassfish.jersey.internal.Errors.process(Errors.java:228) at org.glassfish.jersey.process.internal.RequestScope.runInScope(RequestScope.java:424) at org.glassfish.jersey.client.JerseyInvocation.invoke(JerseyInvocation.java:664) at org.glassfish.jersey.client.JerseyInvocation$Builder.method(JerseyInvocation.java:424) at org.glassfish.jersey.client.JerseyInvocation$Builder.post(JerseyInvocation.java:333) at net.adamsmolnik.client.DigestNoLimitClient.main(DigestNoLimitClient.java:43) Caused by: java.lang.IllegalStateException: Already connected at sun.net.www.protocol.http.HttpURLConnection.setRequestProperty(HttpURLConnection.java:3000) at org.glassfish.jersey.client.HttpUrlConnector.setOutboundHeaders(HttpUrlConnector.java:348) at org.glassfish.jersey.client.HttpUrlConnector.access$100(HttpUrlConnector.java:87) at org.glassfish.jersey.client.HttpUrlConnector$3.getOutputStream(HttpUrlConnector.java:311) at org.glassfish.jersey.message.internal.CommittingOutputStream.commitStream(CommittingOutputStream.java:200) at org.glassfish.jersey.message.internal.CommittingOutputStream.commitStream(CommittingOutputStream.java:194) at org.glassfish.jersey.message.internal.CommittingOutputStream.commit(CommittingOutputStream.java:262) at org.glassfish.jersey.message.internal.OutboundMessageContext.commitStream(OutboundMessageContext.java:811) at org.glassfish.jersey.client.ClientRequest.writeEntity(ClientRequest.java:546) at org.glassfish.jersey.client.HttpUrlConnector._apply(HttpUrlConnector.java:315) at org.glassfish.jersey.client.HttpUrlConnector.apply(HttpUrlConnector.java:227) at org.glassfish.jersey.client.ClientRuntime.invoke(ClientRuntime.java:246) Compare the behavior of code listed above with that showed below: String host = "http://blabla.bla"; HttpURLConnection con = (HttpURLConnection)new URL(host).openConnection(); con.setDoOutput(true); con.getOutputStream().write(1); You get the exception as expected: Exception in thread "main" java.net.UnknownHostException: blabla.bla at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:184) at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:172) at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392) at java.net.Socket.connect(Socket.java:589)

    Java.net JIRA | 2 years ago | adams74
    java.net.UnknownHostException: blabla.bla
  3. Speed up your debug routine!

    Automated exception search integrated into your IDE

  4. 0

    BUILD FAILURE when running tests behind a proxy

    GitHub | 2 years ago | ARyan2812
    java.net.UnknownHostException: svcs.sandbox.paypal.com

  1. eti22 2 times, last 2 months ago
  2. eti22 8 times, last 2 months ago
  3. serious2monkeys 2 times, last 2 months ago
  4. Andreas Häber 16 times, last 2 months ago
  5. davidvanlaatum 2 times, last 3 months ago
6 more registered users
40 unregistered visitors
Not finding the right solution?
Take a tour to get the most out of Samebug.

Tired of useless tips?

Automated exception search integrated into your IDE

Root Cause Analysis

  1. java.net.UnknownHostException

    blabla.bla

    at java.net.AbstractPlainSocketImpl.connect()
  2. Java RT
    Socket.connect
    1. java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:184)
    2. java.net.PlainSocketImpl.connect(PlainSocketImpl.java:172)
    3. java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
    4. java.net.Socket.connect(Socket.java:589)
    4 frames