Hi,
I encounter an error using MINA 2, and I can't find any solution, the error
message is
"org.apache.mina.core.RuntimeIoException: Failed to initialize"
Caused by
"java.io.IOException: Unable to establish loopback connection"
I searched a lot on google, and did a lot of experiment, but can't find any
solution, so I'm wondering if someone could give me idea of new things to
look for (even if you don't have answer, ideas are welcome), or someone
already encountered this error and solved it.
The application is quite complex, but to sum up, it's a server/client
architecture, there is usually on one JVM (OSGi framework):
- 2 servers
- 1 client
And a second JVM usually connects to the first as a client (to get its
status)
In a real case there are other hosts with clients that connect to the first,
but here it doesn't matter.
The problem happens when I close the server and reopen it, sometimes (it's
random, it usually happens 1 time for 3 tries) one of the server fails to
start, displaying this error:
org.apache.mina.core.RuntimeIoException: Failed to initialize.
org.apache.mina.core.polling.AbstractPollingIoAcceptor.<init>(AbstractPollingIoAcceptor.java:207)
org.apache.mina.core.polling.AbstractPollingIoAcceptor.<init>(AbstractPollingIoAcceptor.java:104)
org.apache.mina.transport.socket.nio.NioSocketAcceptor.<init>(NioSocketAcceptor.java:66)
com.xx.backbone.communication.AbstractServer.createServer(AbstractServer.java:163)
com.xx.backbone.communication.BackboneManagerAPI.bind(BackboneManagerAPI.java:76)
com.xx.backbone.agent.BackboneAgent.<init>(BackboneAgent.java:57)
com.xx.backbone.osgi.agent.AgentActivator.start(AgentActivator.java:58)
org.apache.felix.framework.util.SecureAction.startActivator(SecureAction.java:629)
org.apache.felix.framework.Felix.activateBundle(Felix.java:1827)
org.apache.felix.framework.Felix.startBundle(Felix.java:1744)
org.apache.felix.framework.BundleImpl.start(BundleImpl.java:922)
org.apache.felix.framework.BundleImpl.start(BundleImpl.java:909)
org.apache.felix.fileinstall.internal.DirectoryWatcher.start(DirectoryWatcher.java:1133)
org.apache.felix.fileinstall.internal.DirectoryWatcher.start(DirectoryWatcher.java:1119)
org.apache.felix.fileinstall.internal.DirectoryWatcher.startAllBundles(DirectoryWatcher.java:1112)
org.apache.felix.fileinstall.internal.DirectoryWatcher.process(DirectoryWatcher.java:430)
org.apache.felix.fileinstall.internal.DirectoryWatcher.run(DirectoryWatcher.java:238)
Caused by : java.io.IOException: Unable to establish loopback connection
sun.nio.ch.PipeImpl$Initializer.run(PipeImpl.java:106)
java.security.AccessController.doPrivileged(Native Method)
sun.nio.ch.PipeImpl.<init>(PipeImpl.java:122)
sun.nio.ch.SelectorProviderImpl.openPipe(SelectorProviderImpl.java:27)
java.nio.channels.Pipe.open(Pipe.java:133)
sun.nio.ch.WindowsSelectorImpl.<init>(WindowsSelectorImpl.java:104)
sun.nio.ch.WindowsSelectorProvider.openSelector(WindowsSelectorProvider.java:26)
java.nio.channels.Selector.open(Selector.java:209)
org.apache.mina.transport.socket.nio.NioSocketAcceptor.init(NioSocketAcceptor.java:110)
org.apache.mina.core.polling.AbstractPollingIoAcceptor.<init>(AbstractPollingIoAcceptor.java:199)
org.apache.mina.core.polling.AbstractPollingIoAcceptor.<init>(AbstractPollingIoAcceptor.java:104)
org.apache.mina.transport.socket.nio.NioSocketAcceptor.<init>(NioSocketAcceptor.java:66)
com.xx.backbone.communication.AbstractServer.createServer(AbstractServer.java:163)
com.xx.backbone.communication.BackboneManagerAPI.bind(BackboneManagerAPI.java:76)
com.xx.backbone.agent.BackboneAgent.<init>(BackboneAgent.java:57)
com.xx.backbone.osgi.agent.AgentActivator.start(AgentActivator.java:58)
org.apache.felix.framework.util.SecureAction.startActivator(SecureAction.java:629)
org.apache.felix.framework.Felix.activateBundle(Felix.java:1827)
org.apache.felix.framework.Felix.startBundle(Felix.java:1744)
org.apache.felix.framework.BundleImpl.start(BundleImpl.java:922)
org.apache.felix.framework.BundleImpl.start(BundleImpl.java:909)
org.apache.felix.fileinstall.internal.DirectoryWatcher.start(DirectoryWatcher.java:1133)
org.apache.felix.fileinstall.internal.DirectoryWatcher.start(DirectoryWatcher.java:1119)
org.apache.felix.fileinstall.internal.DirectoryWatcher.startAllBundles(DirectoryWatcher.java:1112)
org.apache.felix.fileinstall.internal.DirectoryWatcher.process(DirectoryWatcher.java:430)
org.apache.felix.fileinstall.internal.DirectoryWatcher.run(DirectoryWatcher.java:238)
Searching Google tells me there could be error when initializing
NioSocketAcceptor/NioSocketConnector, but I think I did the things correct,
the NioSocketConnector is instantiated only once (in a thread safe context)
and disposed only at the end of the application.
The NioSocketAcceptor is instantiated twice, because the handler and bind
ports are different (<-- maybe I'm wrong here, but I can't see an other way
to do it). The 2 NioSocketAcceptor are thread safe too (they can't be
instantiated at the same time)
I'm using a TextLineCodecFactory and a sslFilter.
The initialization code is (simplified):
acceptor = new NioSocketAcceptor(); // <--- Error happears here !
acceptor.getFilterChain().addFirst("sslFilter",
SslConfiguration.getSslFilter(false));
acceptor.getFilterChain().addLast("codec", new
ProtocolCodecFilter(ProtocolCodec.getTextCodec()));
acceptor.setReuseAddress(true);
acceptor.getSessionConfig().setTcpNoDelay(true);
acceptor.setHandler(abstractServerHandler);
acceptor.bind(new InetSocketAddress(port));
Futhermore the problem happears only on windows (sun jvm 1.6, last version),
I tested on other OS (linux, aix (ibm jvm), hpux, solaris) they are all
perfect, it's a windows specific problem.
I hope I gave you enough details. All ideas/remarks are welcome, because I'm
lost and don't know what to do.
Thanks,
Regards,
jb
