simpledb.TransactionAbortedException
	at simpledb.LockManager.acquireLock(LockManager.java:62)
	at simpledb.BufferPool.getPage(BufferPool.java:81)
	at simpledb.TestUtil$LockGrabber.run(TestUtil.java:336)
simpledb.TransactionAbortedException
	at simpledb.LockManager.acquireLock(LockManager.java:62)
	at simpledb.BufferPool.getPage(BufferPool.java:81)
	at simpledb.TestUtil$LockGrabber.run(TestUtil.java:336)
simpledb.TransactionAbortedException
	at simpledb.LockManager.acquireLock(LockManager.java:62)
	at simpledb.BufferPool.getPage(BufferPool.java:81)
	at simpledb.TestUtil$LockGrabber.run(TestUtil.java:336)