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https://issues.apache.org/jira/browse/KARAF-5084?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15961400#comment-15961400
]
Michael Vorburger commented on KARAF-5084:
------------------------------------------
http://blog2.vorburger.ch/2017/04/java-local-rmi-using-jdks-inetaddress.html
describes more background about what's going on here.
It turns out that I slightly confused two things: There are two strictly
speaking separate problems in the log above - the first exception, from
org.apache.karaf.management.ConnectorServerFactory, is a actually not directly
impacting Pax Exam - it just means that Karaf Management JMX server hits a
similar issue. Unless you need to use JMX, that is not a problem at least for
running tests. The second exception is
https://ops4j1.jira.com/browse/PAXEXAM-740, and fixing that required no
changes in Karaf, just in Pax Exam, after all.
I'll close this issue as my interest was to get PAXEXAM-740 resolved. If
someone else is bothered by the NoRouteToHostException from Karaf JMX, then
feel free to re-open. The big difference though is that one may WANT the Karaf
JMX RMI server to be accessible on non-loopback network interfaces too, for
remote monitoring & administration; contrary to Pax Exam's RMI which is always
strictly local. So e.g. programmatically in Karaf code forcing
System.setProperty("java.rmi.server.hostname",
InetAddress.getLoopbackAddress().getHostAddress()) is most probably Not a Good
Idea... you may want to simply set java.rmi.server.hostname to a "suitable"
hostname for your system in your Karaf start-up script?
> Use of LocateRegistry in RmiRegistryFactory problematic due to
> InetAddress.getLocalHost().getHostAddress()
> ----------------------------------------------------------------------------------------------------------
>
> Key: KARAF-5084
> URL: https://issues.apache.org/jira/browse/KARAF-5084
> Project: Karaf
> Issue Type: Bug
> Components: karaf-management
> Affects Versions: 4.1.1
> Reporter: Michael Vorburger
>
> I'm hitting this error e.g. from the
> KarafTestContainerITest.checkKarafSystemService in the
> org.ops4j.pax.exam2/containers/pax-exam-container-karaf :
> {code}Exception in thread "JMX Connector Thread
> [service:jmx:rmi://0.0.0.0:44444/jndi/rmi://0.0.0.0:1099/karaf-root]"
> java.lang.RuntimeException: Could not start JMX connector server
> at
> org.apache.karaf.management.ConnectorServerFactory$1.run(ConnectorServerFactory.java:258)
> Caused by: java.io.IOException: Cannot bind to URL
> [rmi://0.0.0.0:1099/karaf-root]: javax.naming.CommunicationException [Root
> exception is java.rmi.ConnectIOException: Exception creating connection to:
> 0.0.0.0; nested exception is:
> java.net.NoRouteToHostException: No route to host (Host unreachable)]
> at
> javax.management.remote.rmi.RMIConnectorServer.newIOException(RMIConnectorServer.java:827)
> at
> javax.management.remote.rmi.RMIConnectorServer.start(RMIConnectorServer.java:432)
> at
> org.apache.karaf.management.ConnectorServerFactory$1.run(ConnectorServerFactory.java:245)
> Caused by: javax.naming.CommunicationException [Root exception is
> java.rmi.ConnectIOException: Exception creating connection to: 0.0.0.0;
> nested exception is:
> java.net.NoRouteToHostException: No route to host (Host unreachable)]
> at
> com.sun.jndi.rmi.registry.RegistryContext.bind(RegistryContext.java:161)
> at
> com.sun.jndi.toolkit.url.GenericURLContext.bind(GenericURLContext.java:228)
> at javax.naming.InitialContext.bind(InitialContext.java:425)
> at
> javax.management.remote.rmi.RMIConnectorServer.bind(RMIConnectorServer.java:644)
> at
> javax.management.remote.rmi.RMIConnectorServer.start(RMIConnectorServer.java:427)
> ... 1 more
> Caused by: java.rmi.ConnectIOException: Exception creating connection to:
> 0.0.0.0; nested exception is:
> java.net.NoRouteToHostException: No route to host (Host unreachable)
> at sun.rmi.transport.tcp.TCPEndpoint.newSocket(TCPEndpoint.java:631)
> at
> sun.rmi.transport.tcp.TCPChannel.createConnection(TCPChannel.java:216)
> at sun.rmi.transport.tcp.TCPChannel.newConnection(TCPChannel.java:202)
> at sun.rmi.server.UnicastRef.newCall(UnicastRef.java:342)
> at sun.rmi.registry.RegistryImpl_Stub.bind(Unknown Source)
> at
> com.sun.jndi.rmi.registry.RegistryContext.bind(RegistryContext.java:155)
> ... 5 more
> Caused by: java.net.NoRouteToHostException: No route to host (Host
> unreachable)
> at java.net.PlainSocketImpl.socketConnect(Native Method)
> at
> java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
> at
> java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:204)
> at
> java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
> at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
> at java.net.Socket.connect(Socket.java:589)
> at java.net.Socket.connect(Socket.java:538)
> at java.net.Socket.<init>(Socket.java:434)
> at java.net.Socket.<init>(Socket.java:211)
> at
> sun.rmi.transport.proxy.RMIDirectSocketFactory.createSocket(RMIDirectSocketFactory.java:40)
> at
> sun.rmi.transport.proxy.RMIMasterSocketFactory.createSocket(RMIMasterSocketFactory.java:148)
> at sun.rmi.transport.tcp.TCPEndpoint.newSocket(TCPEndpoint.java:613)
> ... 10 more
> 02:33:50.966 [main] INFO o.o.p.e.spi.reactors.ReactorManager - suite finished
> Tests run: 1, Failures: 0, Errors: 1, Skipped: 0, Time elapsed: 182.081 sec
> <<< FAILURE! - in org.ops4j.pax.exam.karaf.container.KarafTestContainerITest
> checkKarafSystemService(org.ops4j.pax.exam.karaf.container.KarafTestContainerITest)
> Time elapsed: 182.074 sec <<< ERROR!
> java.net.NoRouteToHostException: No route to host (Host unreachable)
> at java.net.PlainSocketImpl.socketConnect(Native Method)
> at
> java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
> at
> java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
> at
> java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
> at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
> at java.net.Socket.connect(Socket.java:589)
> at java.net.Socket.connect(Socket.java:538)
> at java.net.Socket.<init>(Socket.java:434)
> at java.net.Socket.<init>(Socket.java:211)
> at
> sun.rmi.transport.proxy.RMIDirectSocketFactory.createSocket(RMIDirectSocketFactory.java:40)
> at
> sun.rmi.transport.proxy.RMIMasterSocketFactory.createSocket(RMIMasterSocketFactory.java:148)
> at sun.rmi.transport.tcp.TCPEndpoint.newSocket(TCPEndpoint.java:613)
> at
> sun.rmi.transport.tcp.TCPChannel.createConnection(TCPChannel.java:216)
> at sun.rmi.transport.tcp.TCPChannel.newConnection(TCPChannel.java:202)
> at sun.rmi.server.UnicastRef.newCall(UnicastRef.java:342)
> at sun.rmi.registry.RegistryImpl_Stub.lookup(Unknown Source)
> at
> org.ops4j.pax.exam.rbc.client.intern.RemoteBundleContextClientImpl.getRemoteBundleContext(RemoteBundleContextClientImpl.java:242)
> at
> org.ops4j.pax.exam.rbc.client.intern.RemoteBundleContextClientImpl.waitForState(RemoteBundleContextClientImpl.java:211)
> at
> org.ops4j.pax.exam.karaf.container.internal.KarafTestContainer.waitForState(KarafTestContainer.java:606)
> at
> org.ops4j.pax.exam.karaf.container.internal.KarafTestContainer.startKaraf(KarafTestContainer.java:240)
> at
> org.ops4j.pax.exam.karaf.container.internal.KarafTestContainer.start(KarafTestContainer.java:180)
> at
> org.ops4j.pax.exam.spi.reactors.AllConfinedStagedReactor.invoke(AllConfinedStagedReactor.java:79)
> at
> org.ops4j.pax.exam.junit.impl.ProbeRunner$2.evaluate(ProbeRunner.java:267)
> at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325)
> at
> org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:78)
> at
> org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:57)
> at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)
> at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)
> at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)
> at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)
> at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)
> at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
> at org.ops4j.pax.exam.junit.impl.ProbeRunner.run(ProbeRunner.java:98)
> at org.ops4j.pax.exam.junit.PaxExam.run(PaxExam.java:93)
> at
> org.apache.maven.surefire.junit4.JUnit4Provider.execute(JUnit4Provider.java:283)
> at
> org.apache.maven.surefire.junit4.JUnit4Provider.executeWithRerun(JUnit4Provider.java:173)
> at
> org.apache.maven.surefire.junit4.JUnit4Provider.executeTestSet(JUnit4Provider.java:153)
> at
> org.apache.maven.surefire.junit4.JUnit4Provider.invoke(JUnit4Provider.java:128)
> at
> org.apache.maven.surefire.booter.ForkedBooter.invokeProviderInSameClassLoader(ForkedBooter.java:203)
> at
> org.apache.maven.surefire.booter.ForkedBooter.runSuitesInProcess(ForkedBooter.java:155)
> at
> org.apache.maven.surefire.booter.ForkedBooter.main(ForkedBooter.java:103){code}
> This is related to the (apparently) problematic use of
> InetAddress.getLocalHost().getHostName() in
> java.rmi.registry.LocateRegistry#getRegistry called by
> org.apache.karaf.management.RmiRegistryFactory; see also:
> * https://bugs.opendaylight.org/show_bug.cgi?id=8176
> * https://issues.apache.org/jira/browse/JCS-40
> * http://bugs.java.com/bugdatabase/view_bug.do?bug_id=4665037
> * https://ops4j1.jira.com/browse/PAXEXAM-740
> * https://docs.oracle.com/javase/8/docs/technotes/guides/rmi/faq.html
> I'll see if I can do something about contributing a fix for this...
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