I'm having problems importing any Maven projects into IntelliJ IDEA. I create an empty Maven project like this:
$ mvn archetype:generate -DgroupId=com.mycompany.app -DartifactId=my-app -DarchetypeArtifactId=maven-archetype-quickstart -DinteractiveMode=false
Then I try to open the project in IDEA (File > Open Project, then choose the pom.xml). A progress box saying "Reading pom.xml" displays for a few minutes, and then just disappears without opening the project.
Looking in the IDEA log, I see some connection timeout exceptions like this:
2012-10-03 11:55:38,502 [ 0] INFO - #com.intellij.idea.Main - ------------------------------------------------------ IDE STARTED ------------------------------------------------------
2012-10-03 11:55:38,512 [ 10] INFO - #com.intellij.idea.Main - IDE: IntelliJ IDEA (build #IC-117.798, 25 Jul 2012 00:00)
2012-10-03 11:55:38,512 [ 10] INFO - #com.intellij.idea.Main - JRE: 1.6.0_25-b06 (Sun Microsystems Inc.)
2012-10-03 11:55:38,512 [ 10] INFO - #com.intellij.idea.Main - JVM: 20.0-b11 (Sun Microsystems Inc.)
2012-10-03 11:55:38,539 [ 37] INFO - .intellij.idea.IdeaApplication - WM detected: Compiz
2012-10-03 11:55:40,328 [ 1826] INFO - llij.ide.plugins.PluginManager - 28 plugins initialized in 1613 ms
2012-10-03 11:55:40,328 [ 1826] INFO - llij.ide.plugins.PluginManager - Loaded plugins:IDEA CORE, Properties Support, Ant Support (1.0), XPathView + XSLT Support (4), IntelliLang (8.0), Copyright (8.1), Groovy (9.0), Maven Integration, Scala (0.5.981), Git Integration (8.1), Task Management (1.0), GitHub, hg4idea (10.0), CVS Integration (11), Intention Power Pack (1.0), I18n for Java, TestNG-J (8.0), GenerateToString (5.0), Commander (1.0.0), Plugin DevKit (1.0), UI Designer, Gradle, Eclipse Integration (3.0), Inspection Gadgets (1.0), JUnit (1.0), Subversion Integration (1.1), XSLT-Debugger (1.4), Android Support (10.0)
2012-10-03 11:55:40,755 [ 2253] INFO - ellij.util.io.PagedFileStorage - lower=100; upper=200; buffer=10; mmap=true
2012-10-03 11:55:40,799 [ 2297] INFO - api.vfs.impl.local.FileWatcher - Starting file watcher: /usr/lib/idea-IC-117.798/bin/fsnotifier64
2012-10-03 11:55:40,800 [ 2298] INFO - api.vfs.impl.local.FileWatcher - Native file watcher is operational.
2012-10-03 11:55:41,181 [ 2679] INFO - s.impl.stores.FileBasedStorage - Document was not loaded for $APP_CONFIG$/ui.lnf.xml file is null
2012-10-03 11:55:41,181 [ 2679] INFO - .impl.stores.XmlElementStorage - Document was not loaded for $APP_CONFIG$/ui.lnf.xml
2012-10-03 11:55:41,824 [ 3322] INFO - TestNG Runner - Create TestNG Template Configuration
2012-10-03 11:55:41,833 [ 3331] INFO - TestNG Runner - Create TestNG Template Configuration
2012-10-03 11:55:41,935 [ 3433] INFO - ellij.project.impl.ProjectImpl - 23 project components initialized in 693 ms
2012-10-03 11:55:41,936 [ 3434] INFO - .module.impl.ModuleManagerImpl - 0 modules loaded in 0 ms
2012-10-03 11:55:41,948 [ 3446] INFO - .intellij.ide.XmlRpcServerImpl - XmlRpc server listening at /127.0.0.1:63342
2012-10-03 11:55:42,252 [ 3750] INFO - s.impl.stores.FileBasedStorage - Document was not loaded for $APP_CONFIG$/macros.xml file is null
2012-10-03 11:55:42,252 [ 3750] INFO - .impl.stores.XmlElementStorage - Document was not loaded for $APP_CONFIG$/macros.xml
2012-10-03 11:55:42,256 [ 3754] INFO - s.impl.stores.FileBasedStorage - Document was not loaded for $APP_CONFIG$/quicklists.xml file is null
2012-10-03 11:55:42,256 [ 3754] INFO - .impl.stores.XmlElementStorage - Document was not loaded for $APP_CONFIG$/quicklists.xml
2012-10-03 11:55:42,330 [ 3828] INFO - pl.stores.ApplicationStoreImpl - 79 application components initialized in 1910 ms
2012-10-03 11:55:42,345 [ 3843] INFO - s.impl.stores.FileBasedStorage - Document was not loaded for $APP_CONFIG$/customization.xml file is null
2012-10-03 11:55:42,345 [ 3843] INFO - .impl.stores.XmlElementStorage - Document was not loaded for $APP_CONFIG$/customization.xml
2012-10-03 11:55:42,499 [ 3997] INFO - ij.openapi.wm.impl.IdeRootPane - App initialization took 4825 ms
2012-10-03 11:55:50,842 [ 12340] INFO - s.impl.stores.FileBasedStorage - Document was not loaded for $APP_CONFIG$/plainTextFiles.xml file is null
2012-10-03 11:55:50,842 [ 12340] INFO - .impl.stores.XmlElementStorage - Document was not loaded for $APP_CONFIG$/plainTextFiles.xml
2012-10-03 11:55:55,348 [ 16846] INFO - ution.rmi.RemoteProcessSupport - /usr/lib/jvm/jdk1.6.0_25/jre/bin/java -Djava.awt.headless=true -Xmx512m -Dfile.encoding=UTF-8 -classpath /usr/lib/idea-IC-117.798/lib/resources_en.jar:/usr/lib/idea-IC-117.798/lib/annotations.jar:/usr/lib/idea-IC-117.798/lib/util.jar:/usr/lib/idea-IC-117.798/lib/trove4j.jar:/usr/lib/idea-IC-117.798/lib/jdom.jar:/usr/lib/idea-IC-117.798/plugins/maven/lib/lucene-core-2.4.1.jar:/usr/lib/idea-IC-117.798/plugins/maven/lib/activation-1.1.jar:/usr/lib/idea-IC-117.798/plugins/maven/lib/maven-2.2.1-uber.jar:/usr/lib/idea-IC-117.798/plugins/maven/lib/maven2-server-impl.jar:/usr/lib/idea-IC-117.798/plugins/maven/lib/jaxb-impl.jar:/usr/lib/idea-IC-117.798/plugins/maven/lib/jaxb-api.jar:/usr/lib/idea-IC-117.798/plugins/maven/lib/maven-embedder-1.1-SNAPSHOT.jar:/usr/lib/idea-IC-117.798/plugins/maven/lib/classworlds-1.1.jar:/usr/lib/idea-IC-117.798/plugins/maven/lib/resources_en.jar:/usr/lib/idea-IC-117.798/plugins/maven/lib/commons-beanutils.jar:/usr/lib/idea-IC-117.798/plugins/maven/lib/mercury-artifact-1.0-alpha-6.jar:/usr/lib/idea-IC-117.798/plugins/maven/lib/maven-server-api.jar:/usr/lib/idea-IC-117.798/plugins/maven/lib/maven-dependency-tree-1.2.jar:/usr/lib/idea-IC-117.798/plugins/maven/lib/archetype-common-2.0-alpha-4-SNAPSHOT.jar:/usr/lib/idea-IC-117.798/plugins/maven/lib/plexus-utils-1.5.5.jar:/usr/lib/idea-IC-117.798/plugins/maven/lib/wadl-core.jar:/usr/lib/idea-IC-117.798/plugins/maven/lib/nexus-indexer-1.2.3.jar org.jetbrains.idea.maven.server.RemoteMavenServer
2012-10-03 11:55:55,483 [ 16981] INFO - ution.rmi.RemoteProcessSupport - Port/ID: 18011/Maven2ServerImpl9407569f
2012-10-03 11:56:58,898 [ 80396] WARN - ution.rmi.RemoteProcessSupport - The cook failed to start due to java.net.ConnectException: Connection timed out
2012-10-03 11:57:55,483 [ 136981] WARN - ution.rmi.RemoteProcessSupport - java.rmi.NotBoundException: _DEAD_HAND_
2012-10-03 11:57:55,484 [ 136982] WARN - ution.rmi.RemoteProcessSupport - at sun.rmi.registry.RegistryImpl.lookup(RegistryImpl.java:106)
2012-10-03 11:57:55,484 [ 136982] WARN - ution.rmi.RemoteProcessSupport - at com.intellij.execution.rmi.RemoteServer.start(RemoteServer.java:73)
2012-10-03 11:57:55,484 [ 136982] WARN - ution.rmi.RemoteProcessSupport - at org.jetbrains.idea.maven.server.RemoteMavenServer.main(RemoteMavenServer.java:22)
2012-10-03 11:58:01,749 [ 143247] ERROR - com.intellij.ide.IdeEventQueue - Error during dispatching of java.awt.event.MouseEvent[MOUSE_RELEASED,(65,116),absolute(64,140),button=1,modifiers=Button1,clickCount=1] on frame0
java.lang.RuntimeException: Cannot reconnect.
at org.jetbrains.idea.maven.server.RemoteObjectWrapper.perform(RemoteObjectWrapper.java:82)
at org.jetbrains.idea.maven.server.MavenServerManager.applyProfiles(MavenServerManager.java:311)
at org.jetbrains.idea.maven.project.MavenProjectReader.applyProfiles(MavenProjectReader.java:369)
at org.jetbrains.idea.maven.project.MavenProjectReader.doReadProjectModel(MavenProjectReader.java:98)
at org.jetbrains.idea.maven.project.MavenProjectReader.readProject(MavenProjectReader.java:52)
at org.jetbrains.idea.maven.project.MavenProject.read(MavenProject.java:405)
at org.jetbrains.idea.maven.project.MavenProjectsTree.doUpdate(MavenProjectsTree.java:534)
at org.jetbrains.idea.maven.project.MavenProjectsTree.doAdd(MavenProjectsTree.java:481)
at org.jetbrains.idea.maven.project.MavenProjectsTree.update(MavenProjectsTree.java:442)
at org.jetbrains.idea.maven.project.MavenProjectsTree.updateAll(MavenProjectsTree.java:413)
at org.jetbrains.idea.maven.wizards.MavenProjectBuilder.readMavenProjectTree(MavenProjectBuilder.java:198)
at org.jetbrains.idea.maven.wizards.MavenProjectBuilder.access$800(MavenProjectBuilder.java:44)
at org.jetbrains.idea.maven.wizards.MavenProjectBuilder$3.run(MavenProjectBuilder.java:179)
at org.jetbrains.idea.maven.utils.MavenUtil$8.run(MavenUtil.java:388)
at com.intellij.openapi.progress.impl.ProgressManagerImpl$TaskRunnable.run(ProgressManagerImpl.java:469)
at com.intellij.openapi.progress.impl.ProgressManagerImpl$6.run(ProgressManagerImpl.java:288)
at com.intellij.openapi.progress.impl.ProgressManagerImpl$2.run(ProgressManagerImpl.java:178)
at com.intellij.openapi.progress.impl.ProgressManagerImpl.executeProcessUnderProgress(ProgressManagerImpl.java:218)
at com.intellij.openapi.progress.impl.ProgressManagerImpl.runProcess(ProgressManagerImpl.java:169)
at com.intellij.openapi.application.impl.ApplicationImpl$8$1.run(ApplicationImpl.java:641)
at com.intellij.openapi.application.impl.ApplicationImpl$6.run(ApplicationImpl.java:434)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:441)
at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303)
at java.util.concurrent.FutureTask.run(FutureTask.java:138)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
at java.lang.Thread.run(Thread.java:662)
at com.intellij.openapi.application.impl.ApplicationImpl$1$1.run(ApplicationImpl.java:145)
Caused by: java.rmi.RemoteException: Cannot start maven service; nested exception is:
java.rmi.ConnectException: Connection refused to host: localhost; nested exception is:
java.net.ConnectException: Connection timed out
at org.jetbrains.idea.maven.server.MavenServerManager.create(MavenServerManager.java:120)
at org.jetbrains.idea.maven.server.MavenServerManager.create(MavenServerManager.java:71)
at org.jetbrains.idea.maven.server.RemoteObjectWrapper.getOrCreateWrappee(RemoteObjectWrapper.java:41)
at org.jetbrains.idea.maven.server.MavenServerManager$8.execute(MavenServerManager.java:314)
at org.jetbrains.idea.maven.server.MavenServerManager$8.execute(MavenServerManager.java:311)
at org.jetbrains.idea.maven.server.RemoteObjectWrapper.perform(RemoteObjectWrapper.java:76)
... 27 more
Caused by: java.rmi.ConnectException: Connection refused to host: localhost; nested exception is:
java.net.ConnectException: Connection timed out
at sun.rmi.transport.tcp.TCPEndpoint.newSocket(TCPEndpoint.java:601)
at sun.rmi.transport.tcp.TCPChannel.createConnection(TCPChannel.java:198)
at sun.rmi.transport.tcp.TCPChannel.newConnection(TCPChannel.java:184)
at sun.rmi.server.UnicastRef.newCall(UnicastRef.java:322)
at sun.rmi.registry.RegistryImpl_Stub.lookup(Unknown Source)
at com.intellij.execution.rmi.RemoteProcessSupport$2.compute(RemoteProcessSupport.java:215)
at com.intellij.execution.rmi.RemoteUtil.executeWithClassLoader(RemoteUtil.java:122)
at com.intellij.execution.rmi.RemoteProcessSupport.acquire(RemoteProcessSupport.java:212)
at com.intellij.execution.rmi.RemoteProcessSupport.acquire(RemoteProcessSupport.java:133)
at org.jetbrains.idea.maven.server.MavenServerManager.create(MavenServerManager.java:117)
... 32 more
Caused by: java.net.ConnectException: Connection timed out
at java.net.PlainSocketImpl.socketConnect(Native Method)
at java.net.PlainSocketImpl.doConnect(PlainSocketImpl.java:351)
at java. 
