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From Ted Yu <yuzhih...@gmail.com>
Subject Cannot open filename error
Date Mon, 01 Mar 2010 21:05:10 GMT
Hi,
I saw this in our HBase 0.20.1 master log:

2010-03-01 12:38:42,451 INFO  [HMaster] master.ProcessRegionOpen(80):
Updated row domaincrawltable,,1267475905927 in region .META.,,1 with
startcode=1267475746189, server=10.10.31.135:60020
2010-03-01 12:39:06,088 INFO  [Thread-10]
master.ServerManager$ServerMonitor(130): 3 region servers, 0 dead, average
load 17.666666666666668
2010-03-01 12:39:25,939 INFO  [RegionManager.rootScanner]
master.BaseScanner(146): RegionManager.rootScanner scanning meta region
{server: 10.10.31.136:60020, regionname: -ROOT-,,0, startKey: <>}
2010-03-01 12:39:25,944 INFO  [RegionManager.rootScanner]
master.BaseScanner(224): RegionManager.rootScanner scan of 1 row(s) of meta
region {server: 10.10.31.136:60020, regionname: -ROOT-,,0, startKey: <>}
complete
2010-03-01 12:39:32,053 WARN  [RegionManager.metaScanner]
master.MetaScanner(78): Scan one META region: {server: 10.10.31.137:60020,
regionname: .META.,,1, startKey: <>}
java.io.IOException: java.io.IOException: Cannot open filename
/hbase/.META./1028785192/info/4094183944991075010
        at
org.apache.hadoop.hdfs.DFSClient$DFSInputStream.openInfo(DFSClient.java:1474)
        at
org.apache.hadoop.hdfs.DFSClient$DFSInputStream.chooseDataNode(DFSClient.java:1800)
        at
org.apache.hadoop.hdfs.DFSClient$DFSInputStream.blockSeekTo(DFSClient.java:1616)
        at
org.apache.hadoop.hdfs.DFSClient$DFSInputStream.read(DFSClient.java:1743)
        at java.io.DataInputStream.read(DataInputStream.java:132)
        at
org.apache.hadoop.hbase.io.hfile.BoundedRangeFileInputStream.read(BoundedRangeFileInputStream.java:99)
        at org.apache.hadoop.io.IOUtils.readFully(IOUtils.java:100)
        at
org.apache.hadoop.hbase.io.hfile.HFile$Reader.decompress(HFile.java:981)
        at
org.apache.hadoop.hbase.io.hfile.HFile$Reader.readBlock(HFile.java:935)
        at
org.apache.hadoop.hbase.io.hfile.HFile$Reader$Scanner.loadBlock(HFile.java:1265)
        at
org.apache.hadoop.hbase.io.hfile.HFile$Reader$Scanner.seekTo(HFile.java:1147)
        at
org.apache.hadoop.hbase.regionserver.StoreFileGetScan.getStoreFile(StoreFileGetScan.java:80)
        at
org.apache.hadoop.hbase.regionserver.StoreFileGetScan.get(StoreFileGetScan.java:65)
        at org.apache.hadoop.hbase.regionserver.Store.get(Store.java:1471)
        at
org.apache.hadoop.hbase.regionserver.HRegion.get(HRegion.java:2294)
        at
org.apache.hadoop.hbase.regionserver.HRegion.get(HRegion.java:2283)
        at
org.apache.hadoop.hbase.regionserver.HRegionServer.get(HRegionServer.java:1785)
        at sun.reflect.GeneratedMethodAccessor5.invoke(Unknown Source)
        at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
        at java.lang.reflect.Method.invoke(Method.java:597)
        at
org.apache.hadoop.hbase.ipc.HBaseRPC$Server.call(HBaseRPC.java:648)
        at
org.apache.hadoop.hbase.ipc.HBaseServer$Handler.run(HBaseServer.java:915)

        at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native
Method)
        at
sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)

[root@snv-it-lin-006 software]# hfs -ls /hbase/.META./1028785192/info/
Found 4 items
-rw-r--r--   3 hbaseadmin supergroup       4465 2010-03-01 12:35
/hbase/.META./1028785192/info/2734607187585444172
-rw-r--r--   3 hbaseadmin supergroup      14140 2010-03-01 10:41
/hbase/.META./1028785192/info/6809882943741425603
-rw-r--r--   3 hbaseadmin supergroup     226422 2010-03-01 10:41
/hbase/.META./1028785192/info/7072901656043692885
-rw-r--r--   3 hbaseadmin supergroup      14403 2010-03-01 12:36
/hbase/.META./1028785192/info/7408853062491968424

What could have led to missing file under .META. ?

Thanks

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