hdfs fsck says it is healthy. The filesystem under path '/apps/hbase' is HEALTHY The Increment operation from the application side is triggering this error. And it is happening every time. It feels that one particular HFile block is corrupt (with negative tagLength). hbase(main):007:0> scan 'counters', {LIMIT=>1,STARTROW=>'ad:event_count:a'} Returning the result hbase(main):008:0> scan 'counters', {LIMIT=>1,STARTROW=>'ad:event_count:b'} ROW COLUMN+CELL ERROR: java.io.IOException: java.lang.IllegalStateException: Invalid currTagsLen -32701. Block offset: 272031, block length: 72441, position: 32487 (without header). at org.apache.hadoop.hbase.regionserver.HRegion$RegionScannerImpl.handleException(HRegion.java:5607) at org.apache.hadoop.hbase.regionserver.HRegion$RegionScannerImpl.<init>(HRegion.java:5579) at org.apache.hadoop.hbase.regionserver.HRegion.instantiateRegionScanner(HRegion.java:2627) at org.apache.hadoop.hbase.regionserver.HRegion.getScanner(HRegion.java:2613) at org.apache.hadoop.hbase.regionserver.HRegion.getScanner(HRegion.java:2595) at org.apache.hadoop.hbase.regionserver.RSRpcServices.scan(RSRpcServices.java:2282) at org.apache.hadoop.hbase.protobuf.generated.ClientProtos$ClientService$2.callBlockingMethod(ClientProtos.java:32295) ... View more