Index: src/main/java/org/apache/hadoop/hbase/regionserver/Store.java =================================================================== --- src/main/java/org/apache/hadoop/hbase/regionserver/Store.java (revision 1230904) +++ src/main/java/org/apache/hadoop/hbase/regionserver/Store.java (working copy) @@ -875,6 +875,10 @@ if (filesToCompact.size() == 1) { // Single file StoreFile sf = filesToCompact.get(0); + if(sf.getReader() == null){ + LOG.debug("StoreFile " + sf + " has null Reader"); + return result; + } long oldest = (sf.getReader().timeRangeTracker == null) ? Long.MIN_VALUE :