>> there is already an issue to do this but not revamp of these Merge classes I guess the issue is HBASE-1621
On Wed, Jul 6, 2011 at 2:28 PM, Stack <st...@duboce.net> wrote: > Yeah, can you file an issue Lars. This stuff is ancient and needs to > be redone AND redone so we can do merging while table is online (there > is already an issue to do this but not revamp of these Merge classes). > The unit tests for Merge are also all junit3 and do whacky stuff to > put up multiple regions. This should be redone too (they are often > first thing broke when major change and putting them back together is > a headache since they do not follow the usual pattern). > > St.Ack > > On Sun, Jul 3, 2011 at 12:38 AM, Lars George <lars.geo...@gmail.com> > wrote: > > Hi Ted, > > > > The log is from an earlier attempt, I tried this a few times. This is all > local, after rm'ing the /hbase. So the files are all pretty empty, but since > I put data in I was assuming it should work. Once you gotten into this > state, you also get funny error messages in the shell: > > > > hbase(main):001:0> list > > TABLE > > 11/07/03 09:36:21 INFO ipc.HBaseRPC: Using > org.apache.hadoop.hbase.ipc.WritableRpcEngine for > org.apache.hadoop.hbase.ipc.HMasterInterface > > > > ERROR: undefined method `map' for nil:NilClass > > > > Here is some help for this command: > > List all tables in hbase. Optional regular expression parameter could > > be used to filter the output. Examples: > > > > hbase> list > > hbase> list 'abc.*' > > > > > > hbase(main):002:0> > > > > I am assuming this is collateral, but why? The UI works but the table is > gone too. > > > > Lars > > > > On Jul 2, 2011, at 10:55 PM, Ted Yu wrote: > > > >> There is TestMergeTool which tests Merge. > >> > >> From the log you provided, I got a little confused as why > >> 'testtable,row-20,1309613053987.23a35ac696bdf4a8023dcc4c5b8419e0.' > didn't > >> appear in your command line or the output from .META. scanning. > >> > >> On Sat, Jul 2, 2011 at 10:36 AM, Lars George <lars.geo...@gmail.com> > wrote: > >> > >>> Hi, > >>> > >>> These two seem both in a bit of a weird state: HMerge is scoped package > >>> local, therefore no one but the package can call the merge() > functions... > >>> and no one does that but the unit test. But it would be good to have > this on > >>> the CLI and shell as a command (and in the shell maybe with a > confirmation > >>> message?), but it is not available AFAIK. > >>> > >>> HMerge can merge regions of tables that are disabled. It also merges > all > >>> that qualify, i.e. where the merged region is less than or equal of > half the > >>> configured max file size. > >>> > >>> Merge on the other hand does have a main(), so can be invoked: > >>> > >>> $ hbase org.apache.hadoop.hbase.util.Merge > >>> Usage: bin/hbase merge <table-name> <region-1> <region-2> > >>> > >>> Note how the help insinuates that you can use it as a tool, but that is > not > >>> correct. Also, it only merges two given regions, and the cluster must > be > >>> shut down (only the HBase daemons). So that is a step back. > >>> > >>> What is worse is that I cannot get it to work. I tried in the shell: > >>> > >>> hbase(main):001:0> create 'testtable', 'colfam1', {SPLITS => > >>> ['row-10','row-20','row-30','row-40','row-50']} > >>> 0 row(s) in 0.2640 seconds > >>> > >>> hbase(main):002:0> for i in '0'..'9' do for j in '0'..'9' do put > >>> 'testtable', "row-#{i}#{j}", "colfam1:#{j}", "#{j}" end end > >>> 0 row(s) in 1.0450 seconds > >>> > >>> hbase(main):003:0> flush 'testtable' > >>> 0 row(s) in 0.2000 seconds > >>> > >>> hbase(main):004:0> scan '.META.', { COLUMNS => ['info:regioninfo']} > >>> ROW COLUMN+CELL > >>> testtable,,1309614509037.612d1e0112 column=info:regioninfo, > >>> timestamp=130... > >>> 406e6c2bb482eeaec57322. STARTKEY => '', ENDKEY => 'row-10' > >>> testtable,row-10,1309614509040.2fba column=info:regioninfo, > >>> timestamp=130... > >>> fcc9bc6afac94c465ce5dcabc5d1. STARTKEY => 'row-10', ENDKEY => > >>> 'row-20' > >>> testtable,row-20,1309614509041.e7c1 column=info:regioninfo, > >>> timestamp=130... > >>> 6267eb30e147e5d988c63d40f982. STARTKEY => 'row-20', ENDKEY => > >>> 'row-30' > >>> testtable,row-30,1309614509041.a9cd column=info:regioninfo, > >>> timestamp=130... > >>> e1cbc7d1a21b1aca2ac7fda30ad8. STARTKEY => 'row-30', ENDKEY => > >>> 'row-40' > >>> testtable,row-40,1309614509041.d458 column=info:regioninfo, > >>> timestamp=130... > >>> 236feae097efcf33477e7acc51d4. STARTKEY => 'row-40', ENDKEY => > >>> 'row-50' > >>> testtable,row-50,1309614509041.74a5 column=info:regioninfo, > >>> timestamp=130... > >>> 7dc7e3e9602d9229b15d4c0357d1. STARTKEY => 'row-50', ENDKEY => '' > >>> 6 row(s) in 0.0440 seconds > >>> > >>> hbase(main):005:0> exit > >>> > >>> $ ./bin/stop-hbase.sh > >>> > >>> $ hbase org.apache.hadoop.hbase.util.Merge testtable \ > >>> testtable,row-20,1309614509041.e7c16267eb30e147e5d988c63d40f982. \ > >>> testtable,row-30,1309614509041.a9cde1cbc7d1a21b1aca2ac7fda30ad8. > >>> > >>> But I get consistently errors: > >>> > >>> 11/07/02 07:20:49 INFO util.Merge: Merging regions > >>> testtable,row-20,1309613053987.23a35ac696bdf4a8023dcc4c5b8419e0. and > >>> testtable,row-30,1309613053987.3664920956c30ac5ff2a7726e4e6 in table > >>> testtable > >>> 11/07/02 07:20:49 INFO wal.HLog: HLog configuration: blocksize=32 MB, > >>> rollsize=30.4 MB, enabled=true, optionallogflushinternal=1000ms > >>> 11/07/02 07:20:49 INFO wal.HLog: New hlog > >>> > /Volumes/Macintosh-HD/Users/larsgeorge/.logs_1309616449171/hlog.1309616449181 > >>> 11/07/02 07:20:49 INFO wal.HLog: getNumCurrentReplicas--HDFS-826 not > >>> available; hdfs_out=org.apache.hadoop.fs.FSDataOutputStream@25961581, > >>> > exception=org.apache.hadoop.fs.ChecksumFileSystem$ChecksumFSOutputSummer.getNumCurrentReplicas() > >>> 11/07/02 07:20:49 INFO regionserver.HRegion: Setting up tabledescriptor > >>> config now ... > >>> 11/07/02 07:20:49 INFO regionserver.HRegion: Onlined > -ROOT-,,0.70236052; > >>> next sequenceid=1 > >>> info: null > >>> region1: [B@48fd918a > >>> region2: [B@7f5e2075 > >>> 11/07/02 07:20:49 FATAL util.Merge: Merge failed > >>> java.io.IOException: Could not find meta region for > >>> testtable,row-20,1309613053987.23a35ac696bdf4a8023dcc4c5b8419e0. > >>> at > >>> org.apache.hadoop.hbase.util.Merge.mergeTwoRegions(Merge.java:211) > >>> at org.apache.hadoop.hbase.util.Merge.run(Merge.java:111) > >>> at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:65) > >>> at org.apache.hadoop.hbase.util.Merge.main(Merge.java:386) > >>> 11/07/02 07:20:49 INFO regionserver.HRegion: Setting up tabledescriptor > >>> config now ... > >>> 11/07/02 07:20:49 INFO regionserver.HRegion: Onlined > .META.,,1.1028785192; > >>> next sequenceid=1 > >>> 11/07/02 07:20:49 INFO regionserver.HRegion: Closed -ROOT-,,0.70236052 > >>> 11/07/02 07:20:49 INFO wal.HLog: main.logSyncer exiting > >>> 11/07/02 07:20:49 ERROR util.Merge: exiting due to error > >>> java.lang.NullPointerException > >>> at > org.apache.hadoop.hbase.util.Merge$1.processRow(Merge.java:119) > >>> at > >>> > org.apache.hadoop.hbase.util.MetaUtils.scanMetaRegion(MetaUtils.java:229) > >>> at > >>> > org.apache.hadoop.hbase.util.MetaUtils.scanMetaRegion(MetaUtils.java:258) > >>> at org.apache.hadoop.hbase.util.Merge.run(Merge.java:116) > >>> at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:65) > >>> at org.apache.hadoop.hbase.util.Merge.main(Merge.java:386) > >>> > >>> After which I most of the times have shot .META. with an error > >>> > >>> 2011-07-02 06:42:10,763 WARN org.apache.hadoop.hbase.master.HMaster: > Failed > >>> getting all descriptors > >>> java.io.FileNotFoundException: No status for > >>> hdfs://localhost:8020/hbase/.corrupt > >>> at > >>> > org.apache.hadoop.hbase.util.FSUtils.getTableInfoModtime(FSUtils.java:888) > >>> at > >>> > org.apache.hadoop.hbase.util.FSTableDescriptors.get(FSTableDescriptors.java:122) > >>> at > >>> > org.apache.hadoop.hbase.util.FSTableDescriptors.getAll(FSTableDescriptors.java:149) > >>> at > >>> > org.apache.hadoop.hbase.master.HMaster.getHTableDescriptors(HMaster.java:1429) > >>> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) > >>> at > >>> > sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) > >>> at > >>> > sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) > >>> at java.lang.reflect.Method.invoke(Method.java:597) > >>> at > >>> > org.apache.hadoop.hbase.ipc.WritableRpcEngine$Server.call(WritableRpcEngine.java:312) > >>> at > >>> > org.apache.hadoop.hbase.ipc.HBaseServer$Handler.run(HBaseServer.java:1065) > >>> > >>> Lars > > > > >