I started getting these when the server are under heavy load
java.io.IOException: java.io.IOException: java.util.NoSuchElementException
at java.util.TreeMap.key(TreeMap.java:1206)
at java.util.TreeMap.firstKey(TreeMap.java:267)
at
org.apache.hadoop.hbase.regionserver.MemcacheFlusher.flushSomeRegions(MemcacheFlusher.java:227)
at
org.apache.hadoop.hbase.regionserver.MemcacheFlusher.reclaimMemcacheMemory(MemcacheFlusher.java:213)
at
org.apache.hadoop.hbase.regionserver.HRegionServer.batchUpdates(HRegionServer.java:1227)
at sun.reflect.GeneratedMethodAccessor5.invoke(Unknown Source)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at org.apache.hadoop.hbase.ipc.HbaseRPC$Server.call(HbaseRPC.java:634)
at org.apache.hadoop.ipc.Server$Handler.run(Server.java:888)
