Maven hangs while running test case Eclipselink & hsqldb

It does indeed look like a hsqldb issue. Following directions from here the solution was to append the following to the connection-url ;hsqldb.tx=mvcc whatever that means :/

For me this meant that I was using hibernate.hbm2ddl.auto "update" as well as using raw connections to connect to the same HSQL in memory DB. Separating the two into separate in-memory HSQL db's and it started working. Current theory: maybe something is holding onto a session or transaction (esp. one that modifies a whole table) and not closing it? (unfortunately the mvcc fix mentioned didn't help in my case)

hsqldb version 2.3.4, hibernate 4.0.1.Final

my trace:

"main" #1 prio=5 os_prio=31 tid=0x00007fb636001000 nid=0x1303 waiting on condition [0x000000010a68c000]
   java.lang.Thread.State: WAITING (parking)
    at sun.misc.Unsafe.park(Native Method)
    - parking to wait for  <0x00000007957cbd18> (a org.hsqldb.lib.CountUpDownLatch$Sync)
    at java.util.concurrent.locks.LockSupport.park(LockSupport.java:175)
    at java.util.concurrent.locks.AbstractQueuedSynchronizer.parkAndCheckInterrupt(AbstractQueuedSynchronizer.java:836)
    at java.util.concurrent.locks.AbstractQueuedSynchronizer.doAcquireSharedInterruptibly(AbstractQueuedSynchronizer.java:997)
    at java.util.concurrent.locks.AbstractQueuedSynchronizer.acquireSharedInterruptibly(AbstractQueuedSynchronizer.java:1304)
    at org.hsqldb.lib.CountUpDownLatch.await(Unknown Source)
    at org.hsqldb.Session.executeCompiledStatement(Unknown Source)
    at org.hsqldb.Session.execute(Unknown Source)
    - locked <0x00000007957cbbe0> (a org.hsqldb.Session)
    at org.hsqldb.jdbc.JDBCPreparedStatement.fetchResult(Unknown Source)

also ran into it even more with hsqldb version 2.3.4, hibernate 4.1.12.Final

4.0.1.Final worked OK though weird.