This is on 0.90, right? Were you using HDFS to store your region tables? I just ran into the same thing and looked into the org.apache.hadoop.hbase.regionserver.wal.SequenceFileLogReader$WALReader$WALReaderFSDataInputStream.getPos method.
That method does some truly hideous reflection things without checking that the objects involved actually are the correct type. It also pierces the visibility constraints on fields internal to objects by manipulating their visibility. Is that code really necessary? Is there a good way to make it less sensitive to violation of its assumptions? My own situation is a bit unusual since I was testing hbase on a non-HDFS file system, but Abinash's experience makes it seem that there is something worse going on. On Fri, Jan 7, 2011 at 2:32 AM, Abinash Karana (Bizosys) < [email protected]> wrote: > 11/01/07 14:46:11 WARN wal.SequenceFileLogReader: Error while trying to get > accurate file length. Truncation / data loss may occur if RegionServers d > ie. > java.lang.NoSuchMethodException: > > org.apache.hadoop.fs.ChecksumFileSystem$ChecksumFSInputChecker.getFileLength > () > at java.lang.Class.getMethod(Unknown Source) > at > > org.apache.hadoop.hbase.regionserver.wal.SequenceFileLogReader$WALReader$WAL > ReaderFSDataInputStream.getPos(SequenceFileLogReader.java:107) > at > org.apache.hadoop.io.SequenceFile$Reader.<init>(SequenceFile.java:1434) > at > org.apache.hadoop.io.SequenceFile$Reader.<init>(SequenceFile.java:1424) > at > org.apache.hadoop.io.SequenceFile$Reader.<init>(SequenceFile.java:1419) > at > > org.apache.hadoop.hbase.regionserver.wal.SequenceFileLogReader$WALReader.<in > it>(SequenceFileLogReader.java:57) > at > > org.apache.hadoop.hbase.regionserver.wal.SequenceFileLogReader.init(Sequence > FileLogReader.java:158) > at > org.apache.hadoop.hbase.regionserver.wal.HLog.getReader(HLog.java:576) > at > > org.apache.hadoop.hbase.regionserver.HRegion.replayRecoveredEdits(HRegion.ja > va:1848) > at > > org.apache.hadoop.hbase.regionserver.HRegion.replayRecoveredEditsIfAny(HRegi > on.java:1808) > at > org.apache.hadoop.hbase.regionserver.HRegion.initialize(HRegion.java:350) > at > org.apache.hadoop.hbase.regionserver.HRegion.openHRegion(HRegion.java:2505) > at > org.apache.hadoop.hbase.regionserver.HRegion.openHRegion(HRegion.java:2491) > at > > org.apache.hadoop.hbase.regionserver.handler.OpenRegionHandler.openRegion(Op > enRegionHandler.java:262) > at > > org.apache.hadoop.hbase.regionserver.handler.OpenRegionHandler.process(OpenR > egionHandler.java:94) > at > org.apache.hadoop.hbase.executor.EventHandler.run(EventHandler.java:151) > at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(Unknown > Source) > at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown > Source) > at java.lang.Thread.run(Unknown Source) > >
