idx hbase doesn't work w/ 0.20.5 hbase

[saintstack]

Hey Yoram:

A user was trying to run idx with 0.20.5 last night. Weird issue where regionserver got stuck trying to open the idx tables' region. Here is the relevant piece of the stacktrace. It seemed like it was stuck here and just not progressing. What you reckon?

"regionserver/10.209.32.203:60020.worker" daemon prio=10 tid=0x00002aabb8399000 nid=0x56b8 runnable [0x0000000042e8f000]
java.lang.Thread.State: RUNNABLE
at org.apache.hadoop.hbase.regionserver.IdxRegionIndexManager.fillIndex(IdxRegionIndexManager.java:213)
at org.apache.hadoop.hbase.regionserver.IdxRegionIndexManager.rebuildIndexes(IdxRegionIndexManager.java:116)
at org.apache.hadoop.hbase.regionserver.IdxRegion.rebuildIndexes(IdxRegion.java:133)
at org.apache.hadoop.hbase.regionserver.IdxRegion.initialize(IdxRegion.java:107)
at org.apache.hadoop.hbase.regionserver.HRegionServer.instantiateRegion(HRegionServer.java:1545)
at org.apache.hadoop.hbase.regionserver.HRegionServer.openRegion(HRegionServer.java:1512)
at org.apache.hadoop.hbase.regionserver.HRegionServer$Worker.run(HRegionServer.java:1432)
at java.lang.Thread.run(Thread.java:619)