title: “No locks available” when run sbt cmd
body: <p>to building spark project, I tried to use sbt.  The following exception is occured: </p>
  
  <pre><code>java.io.IOException: No locks available
      at sun.nio.ch.FileChannelImpl.lock0(Native Method)
      at sun.nio.ch.FileChannelImpl.tryLock(FileChannelImpl.java:871)
      at java.nio.channels.FileChannel.tryLock(FileChannel.java:962)
      at xsbt.boot.Locks$GlobalLock.withChannel$1(Locks.scala:88)
      at xsbt.boot.Locks$GlobalLock.xsbt$boot$Locks$GlobalLock$$withChannelRetries$1(Locks.scala:81)
      at xsbt.boot.Locks$GlobalLock$$anonfun$withFileLock$1.apply(Locks.scala:102)
      at xsbt.boot.Using$.withResource(Using.scala:11)
      at xsbt.boot.Using$.apply(Using.scala:10)
      at xsbt.boot.Locks$GlobalLock.ignoringDeadlockAvoided(Locks.scala:62)
      at xsbt.boot.Locks$GlobalLock.withLock(Locks.scala:52)
      at xsbt.boot.Locks$.apply0(Locks.scala:31)
      at xsbt.boot.Locks$.apply(Locks.scala:28)
      at xsbt.boot.Update.apply(Update.scala:100)
      at xsbt.boot.Launch.update(Launch.scala:279)
      at xsbt.boot.Launch.xsbt$boot$Launch$$retrieve$1(Launch.scala:149)
      at xsbt.boot.Launch$$anonfun$3.apply(Launch.scala:157)
      at scala.Option.getOrElse(Option.scala:120)
      at xsbt.boot.Launch.xsbt$boot$Launch$$getAppProvider0(Launch.scala:157)
      at xsbt.boot.Launch$$anon$2.call(Launch.scala:142)
      at xsbt.boot.Locks$GlobalLock.withChannel$1(Locks.scala:98)
      at xsbt.boot.Locks$GlobalLock.xsbt$boot$Locks$GlobalLock$$withChannelRetries$1(Locks.scala:81)
      at xsbt.boot.Locks$GlobalLock$$anonfun$withFileLock$1.apply(Locks.scala:102)
      at xsbt.boot.Using$.withResource(Using.scala:11)
      at xsbt.boot.Using$.apply(Using.scala:10)
      at xsbt.boot.Locks$GlobalLock.ignoringDeadlockAvoided(Locks.scala:62)
      at xsbt.boot.Locks$GlobalLock.withLock(Locks.scala:52)
      at xsbt.boot.Locks$.apply0(Locks.scala:31)
      at xsbt.boot.Locks$.apply(Locks.scala:28)
      at xsbt.boot.Launch.locked(Launch.scala:178)
      at xsbt.boot.Launch.app(Launch.scala:93)
      at xsbt.boot.Launch.app(Launch.scala:91)
      at xsbt.boot.Launch$.run(Launch.scala:51)
      at xsbt.boot.Launch$$anonfun$explicit$1.apply(Launch.scala:45)
      at xsbt.boot.Launch$.launch(Launch.scala:65)
      at xsbt.boot.Launch$.apply(Launch.scala:16)
      at xsbt.boot.Boot$.runImpl(Boot.scala:31)
      at xsbt.boot.Boot$.main(Boot.scala:20)
      at xsbt.boot.Boot.main(Boot.scala)
  Error during sbt execution: java.io.IOException: No locks available
  </code></pre>
  
  <p>the sbt version i have tried: 0.11.3-2 and 0.13.0
  I aslo tried changing the sbt boot dir to avoid permission issues.</p>
  
  <p>Any idea that I'm doing it wrong.</p>