Different error on subsequent restart of Master.

Feb 19, 2015 9:29:49 PM SEVERE hudson.remoting.ExportTable unexportByOid

Trying to unexport an object that's already unexported
java.lang.IllegalStateException: Invalid object ID 2 iota=9
	at hudson.remoting.ExportTable.diagnoseInvalidId(ExportTable.java:346)
	at hudson.remoting.ExportTable.unexportByOid(ExportTable.java:369)
	at hudson.remoting.Channel.unexport(Channel.java:603)
	at hudson.remoting.UnexportCommand.execute(UnexportCommand.java:38)
	at hudson.remoting.Channel$2.handle(Channel.java:474)
	at hudson.remoting.AbstractByteArrayCommandTransport$1.handle(AbstractByteArrayCommandTransport.java:61)
	at org.jenkinsci.remoting.nio.NioChannelHub$2.run(NioChannelHub.java:584)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)
	at java.util.concurrent.FutureTask.run(FutureTask.java:262)
	at hudson.remoting.SingleLaneExecutorService$1.run(SingleLaneExecutorService.java:111)
	at jenkins.util.ContextResettingExecutorService$1.run(ContextResettingExecutorService.java:28)
	at java.util.concurrent.Executors$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$Worker.run(ThreadPoolExecutor.java:615)
	at java.lang.Thread.run(Thread.java:745)
Caused by: java.lang.Exception: Object was recently deallocated
    #2 (ref.0) : [hudson.remoting.JarLoader]
      Created at Thu Feb 19 21:28:38 PST 2015
    	at hudson.remoting.ExportTable$Entry.<init>(ExportTable.java:93)
    	at hudson.remoting.ExportTable.export(ExportTable.java:297)
    	at hudson.remoting.Channel.internalExport(Channel.java:591)
    	at hudson.remoting.Channel.export(Channel.java:582)
    	at hudson.remoting.Channel.<init>(Channel.java:466)
    	at hudson.remoting.ChannelBuilder.build(ChannelBuilder.java:149)
    	at hudson.remoting.ChannelBuilder.build(ChannelBuilder.java:159)
    	at org.jenkinsci.remoting.nio.NioChannelBuilder.build(NioChannelBuilder.java:36)
    	at org.jenkinsci.remoting.nio.NioChannelBuilder.build(NioChannelBuilder.java:52)
    	at jenkins.slaves.JnlpSlaveAgentProtocol$Handler.jnlpConnect(JnlpSlaveAgentProtocol.java:120)
    	at jenkins.slaves.DefaultJnlpSlaveReceiver.handle(DefaultJnlpSlaveReceiver.java:63)
    	at jenkins.slaves.JnlpSlaveAgentProtocol2$Handler2.run(JnlpSlaveAgentProtocol2.java:57)
    	at jenkins.slaves.JnlpSlaveAgentProtocol2.handle(JnlpSlaveAgentProtocol2.java:31)
    	at hudson.TcpSlaveAgentListener$ConnectionHandler.run(TcpSlaveAgentListener.java:157)
      Released at Thu Feb 19 21:29:49 PST 2015
    	at hudson.remoting.ExportTable$Entry.release(ExportTable.java:125)
    	at hudson.remoting.ExportTable.unexportByOid(ExportTable.java:374)
    	at hudson.remoting.Channel.unexport(Channel.java:603)
    	at hudson.remoting.UnexportCommand.execute(UnexportCommand.java:38)
    	at hudson.remoting.Channel$2.handle(Channel.java:474)
    	at hudson.remoting.AbstractByteArrayCommandTransport$1.handle(AbstractByteArrayCommandTransport.java:61)
    	at org.jenkinsci.remoting.nio.NioChannelHub$2.run(NioChannelHub.java:584)
    	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)
    	at java.util.concurrent.FutureTask.run(FutureTask.java:262)
    	at hudson.remoting.SingleLaneExecutorService$1.run(SingleLaneExecutorService.java:111)
    	at jenkins.util.ContextResettingExecutorService$1.run(ContextResettingExecutorService.java:28)
    	at java.util.concurrent.Executors$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:745)
    Caused by: Command hudson.remoting.UnexportCommand@23828411 created at
    	at hudson.remoting.Command.<init>(Command.java:67)
    	at hudson.remoting.Command.<init>(Command.java:50)
    	at hudson.remoting.UnexportCommand.<init>(UnexportCommand.java:33)
    	at hudson.remoting.RemoteInvocationHandler.finalize(RemoteInvocationHandler.java:229)
    	at java.lang.System$2.invokeFinalize(System.java:1267)
    	at java.lang.ref.Finalizer.runFinalizer(Finalizer.java:98)
    	at java.lang.ref.Finalizer.access$100(Finalizer.java:34)
    	at java.lang.ref.Finalizer$FinalizerThread.run(Finalizer.java:210)
	at hudson.remoting.ExportTable.diagnoseInvalidId(ExportTable.java:339)
	... 15 more
Caused by:   Released at Thu Feb 19 21:29:49 PST 2015
	at hudson.remoting.ExportTable$Entry.release(ExportTable.java:125)
	at hudson.remoting.ExportTable.unexportByOid(ExportTable.java:374)
	... 14 more
Caused by: Command hudson.remoting.UnexportCommand@23828411 created at
	at hudson.remoting.Command.<init>(Command.java:67)
	at hudson.remoting.Command.<init>(Command.java:50)
	at hudson.remoting.UnexportCommand.<init>(UnexportCommand.java:33)
	at hudson.remoting.RemoteInvocationHandler.finalize(RemoteInvocationHandler.java:229)
	at java.lang.System$2.invokeFinalize(System.java:1267)
	at java.lang.ref.Finalizer.runFinalizer(Finalizer.java:98)
	at java.lang.ref.Finalizer.access$100(Finalizer.java:34)
	at java.lang.ref.Finalizer$FinalizerThread.run(Finalizer.java:210)

Feb 19, 2015 9:29:49 PM SEVERE hudson.remoting.ExportTable unexportByOid

2nd unexport attempt is here
Command hudson.remoting.UnexportCommand@7b72c63a created at
	at hudson.remoting.Command.<init>(Command.java:67)
	at hudson.remoting.Command.<init>(Command.java:50)
	at hudson.remoting.UnexportCommand.<init>(UnexportCommand.java:33)
	at hudson.remoting.RemoteInvocationHandler.finalize(RemoteInvocationHandler.java:229)
	at java.lang.System$2.invokeFinalize(System.java:1267)
	at java.lang.ref.Finalizer.runFinalizer(Finalizer.java:98)
	at java.lang.ref.Finalizer.access$100(Finalizer.java:34)
	at java.lang.ref.Finalizer$FinalizerThread.run(Finalizer.java:210)