When jenkins server name cannot be resolved during plugin startup it doesn't start to work when dns starts to respond properly

[cezary-butler]

Even if jenkins can be open in browser it still can't be reached by plugin.

Unknown server: jenkins.internal
org.codinjutsu.tools.jenkins.exception.ConfigurationException: Unknown server: jenkins.internal
    at org.codinjutsu.tools.jenkins.security.DefaultSecurityClient.runMethod(DefaultSecurityClient.java:137)
    at org.codinjutsu.tools.jenkins.security.DefaultSecurityClient.execute(DefaultSecurityClient.java:68)
    at org.codinjutsu.tools.jenkins.security.DefaultSecurityClient.connect(DefaultSecurityClient.java:61)
    at org.codinjutsu.tools.jenkins.logic.RequestManager.authenticate(RequestManager.java:204)
    at org.codinjutsu.tools.jenkins.view.BrowserPanel$8.run(BrowserPanel.java:393)
    at com.intellij.openapi.progress.impl.CoreProgressManager$TaskRunnable.run(CoreProgressManager.java:563)
    at com.intellij.openapi.progress.impl.CoreProgressManager$2.run(CoreProgressManager.java:152)
    at com.intellij.openapi.progress.impl.CoreProgressManager.a(CoreProgressManager.java:452)
    at com.intellij.openapi.progress.impl.CoreProgressManager.executeProcessUnderProgress(CoreProgressManager.java:402)
    at com.intellij.openapi.progress.impl.ProgressManagerImpl.executeProcessUnderProgress(ProgressManagerImpl.java:54)
    at com.intellij.openapi.progress.impl.CoreProgressManager.runProcess(CoreProgressManager.java:137)
    at com.intellij.openapi.progress.impl.ProgressManagerImpl$1.run(ProgressManagerImpl.java:126)
    at com.intellij.openapi.application.impl.ApplicationImpl$8.run(ApplicationImpl.java:400)
    at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)
    at java.util.concurrent.FutureTask.run(FutureTask.java:262)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
    at java.lang.Thread.run(Thread.java:744)
    at org.jetbrains.ide.PooledThreadExecutor$1$1.run(PooledThreadExecutor.java:56)
Caused by: java.net.UnknownHostException: jenkins.internal
    at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:178)
    at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:172)
    at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
    at java.net.Socket.connect(Socket.java:579)
    at java.net.Socket.connect(Socket.java:528)
    at java.net.Socket.<init>(Socket.java:425)
    at java.net.Socket.<init>(Socket.java:280)
    at org.apache.commons.httpclient.protocol.DefaultProtocolSocketFactory.createSocket(DefaultProtocolSocketFactory.java:80)
    at org.apache.commons.httpclient.protocol.ControllerThreadSocketFactory$1.doit(ControllerThreadSocketFactory.java:91)
    at org.apache.commons.httpclient.protocol.ControllerThreadSocketFactory$SocketTask.run(ControllerThreadSocketFactory.java:158)
    at java.lang.Thread.run(Thread.java:744)