Every time we run a map reduce job against data in HBase, we see
hundreds of UnknownScannerExceptions in the hbase log at ERROR level.
The job seems to complete fine and there are no other errors. Should
I be concerned with these UnknownScannerExceptions? Is this message
really more of a warning than an error?
Example:
2010-09-16 09:20:52,398 ERROR
org.apache.hadoop.hbase.regionserver.HRegionServer:
org.apache.hadoop.hbase.UnknownScannerException: Name: -8711007779313115048
at
org.apache.hadoop.hbase.regionserver.HRegionServer.next(HRegionServer.java:1880)
at sun.reflect.GeneratedMethodAccessor8.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$Server.call(HBaseRPC.java:657)
at
org.apache.hadoop.hbase.ipc.HBaseServer$Handler.run(HBaseServer.java:915)
