EclipseでGlassfish4をDebugしようとすると、69%起動とでてそこで固まってしまう事象が発生。（というか、Debugをしたら毎回だった。）
調べると、”Glassfish 4.0 adapter in Eclipse”のバグとのこと。
(7/11追記)
改めてバグ情報を見直すと下のようにあるのでGlassFishの3系でも発生していた模様。
Same issue than chemi, fresh Kepler 64 bits installation on Windows 7 64 bits. Same problem with glassfish 3 or 4.
(7/11追記終了)
(8/4追記)
eclipseのサーバ追加時に設定したglassfish用のID/Passwordと、glassfishに実際に設定してあるID/Passwordが違う場合も発生した。(glassfish 4.0のデフォルトは”admin/無”っぽい）
(8/4追記終了)
Fix版でていてUpdateManager経由でインストールできるとのことなので早速インストール。
http://download.java.net/glassfish/eclipse/juno
インストール後Eclipse再起動し、Eclipse上でのサーバ（サーバビューに出るやつ）も再度作り直した。
完全に死にきっていないものがあったのかPortがふさがっている旨のメッセージが出たのでPCごと再起動したところ、無事にデバッグできるようになった。
DebugできなかったときEclipseのlogに出ていたスタックトレースは以下のはず。(退避していなかったけど時間的におそらく。。。)
（起動時）
!ENTRY oracle.eclipse.tools.glassfish 4 150 2013-07-08 17:35:17.312
!MESSAGE Unable to start server on time.
!STACK 0
java.util.concurrent.TimeoutException
at java.util.concurrent.FutureTask$Sync.innerGet(FutureTask.java:258)
at java.util.concurrent.FutureTask.get(FutureTask.java:119)
at oracle.eclipse.tools.glassfish.GlassfishGenericServerBehaviour.launchServer(GlassfishGenericServerBehaviour.java:170)
at oracle.eclipse.tools.glassfish.GlassfishServerLaunchDelegate.startDASAndTarget(GlassfishServerLaunchDelegate.java:201)
at oracle.eclipse.tools.glassfish.GlassfishServerLaunchDelegate.launch(GlassfishServerLaunchDelegate.java:109)
at org.eclipse.debug.internal.core.LaunchConfiguration.launch(LaunchConfiguration.java:858)
at org.eclipse.debug.internal.core.LaunchConfiguration.launch(LaunchConfiguration.java:707)
at org.eclipse.debug.internal.core.LaunchConfiguration.launch(LaunchConfiguration.java:700)
at org.eclipse.wst.server.core.internal.Server.startImpl2(Server.java:3537)
at org.eclipse.wst.server.core.internal.Server.startImpl(Server.java:3473)
at org.eclipse.wst.server.core.internal.Server$PublishJob.run(Server.java:311)
at org.eclipse.core.internal.jobs.Worker.run(Worker.java:53)
（再起動時）
!ENTRY oracle.eclipse.tools.glassfish 4 1 2013-07-09 22:42:05.118
!MESSAGE GlassFish: in SunAppServerBehaviour restart
!STACK 1
org.eclipse.core.runtime.CoreException: Unable to start server on time.
at oracle.eclipse.tools.glassfish.GlassfishServerLaunchDelegate.abort(GlassfishServerLaunchDelegate.java:73)
at oracle.eclipse.tools.glassfish.GlassfishServerLaunchDelegate.startDASAndTarget(GlassfishServerLaunchDelegate.java:205)
at oracle.eclipse.tools.glassfish.GlassfishServerLaunchDelegate.launch(GlassfishServerLaunchDelegate.java:109)
at org.eclipse.debug.internal.core.LaunchConfiguration.launch(LaunchConfiguration.java:858)
at org.eclipse.debug.internal.core.LaunchConfiguration.launch(LaunchConfiguration.java:707)
at org.eclipse.debug.internal.core.LaunchConfiguration.launch(LaunchConfiguration.java:700)
at oracle.eclipse.tools.glassfish.GlassfishGenericServerBehaviour$1.run(GlassfishGenericServerBehaviour.java:238)
Caused by: java.util.concurrent.TimeoutException
at java.util.concurrent.FutureTask$Sync.innerGet(FutureTask.java:258)
at java.util.concurrent.FutureTask.get(FutureTask.java:119)
at oracle.eclipse.tools.glassfish.GlassfishGenericServerBehaviour.launchServer(GlassfishGenericServerBehaviour.java:170)
at oracle.eclipse.tools.glassfish.GlassfishServerLaunchDelegate.startDASAndTarget(GlassfishServerLaunchDelegate.java:201)
… 5 more
!SUBENTRY 1 oracle.eclipse.tools.glassfish 4 150 2013-07-09 22:42:05.118
!MESSAGE Unable to start server on time.
!STACK 0
java.util.concurrent.TimeoutException
at java.util.concurrent.FutureTask$Sync.innerGet(FutureTask.java:258)
at java.util.concurrent.FutureTask.get(FutureTask.java:119)
at oracle.eclipse.tools.glassfish.GlassfishGenericServerBehaviour.launchServer(GlassfishGenericServerBehaviour.java:170)
at oracle.eclipse.tools.glassfish.GlassfishServerLaunchDelegate.startDASAndTarget(GlassfishServerLaunchDelegate.java:201)
at oracle.eclipse.tools.glassfish.GlassfishServerLaunchDelegate.launch(GlassfishServerLaunchDelegate.java:109)
at org.eclipse.debug.internal.core.LaunchConfiguration.launch(LaunchConfiguration.java:858)
at org.eclipse.debug.internal.core.LaunchConfiguration.launch(LaunchConfiguration.java:707)
at org.eclipse.debug.internal.core.LaunchConfiguration.launch(LaunchConfiguration.java:700)
at oracle.eclipse.tools.glassfish.GlassfishGenericServerBehaviour$1.run(GlassfishGenericServerBehaviour.java:238)
