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HBASE-548 Tool to online single region

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M    branches/0.1/src/java/org/apache/hadoop/hbase/util/MetaUtils.java
M    trunk/src/java/org/apache/hadoop/hbase/util/MetaUtils.java
    (changeOnlineStatus): Added.



git-svn-id: https://svn.apache.org/repos/asf/hadoop/hbase/trunk@643486 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Michael Stack 2008-04-01 17:52:46 +00:00
parent f15048d4d0
commit 6c124cd285
2 changed files with 33 additions and 1 deletions
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3
CHANGES.txt
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@ -7,6 +7,9 @@ Hbase Change Log
HBASE-505 Region assignments should never time out so long as the region HBASE-505 Region assignments should never time out so long as the region
server reports that it is processing the open request server reports that it is processing the open request
NEW FEATURES
HBASE-548 Tool to online single region
Release 0.1.0 Release 0.1.0
INCOMPATIBLE CHANGES INCOMPATIBLE CHANGES

29
src/java/org/apache/hadoop/hbase/util/MetaUtils.java
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@ -40,6 +40,7 @@ import org.apache.hadoop.hbase.regionserver.HRegion;
import org.apache.hadoop.hbase.HRegionInfo; import org.apache.hadoop.hbase.HRegionInfo;
import org.apache.hadoop.hbase.HScannerInterface; import org.apache.hadoop.hbase.HScannerInterface;
import org.apache.hadoop.hbase.HStoreKey; import org.apache.hadoop.hbase.HStoreKey;
import org.apache.hadoop.hbase.HTable;
/** /**
* Contains utility methods for manipulating HBase meta tables * Contains utility methods for manipulating HBase meta tables
@ -295,4 +296,32 @@ public class MetaUtils {
meta.compactStores(); meta.compactStores();
return meta; return meta;
} }
/**
* Set a single region on/offline.
* This is a tool to repair tables that have offlined tables in their midst.
* Can happen on occasion. Use at your own risk. Call from a bit of java
* or jython script. This method is 'expensive' in that it creates a
* {@link HTable} instance per invocation to go against <code>.META.</code>
* @param c A configuration that has its <code>hbase.master</code>
* properly set.
* @param row Row in the catalog .META. table whose HRegionInfo's offline
* status we want to change.
* @param onlineOffline Pass <code>true</code> to online the region.
* @throws IOException
*/
public static void changeOnlineStatus (final HBaseConfiguration c,
final Text row, final boolean onlineOffline)
throws IOException {
HTable t = new HTable(c, HConstants.META_TABLE_NAME);
byte [] cell = t.get(row, HConstants.COL_REGIONINFO);
// Throws exception if null.
HRegionInfo info = Writables.getHRegionInfo(cell);
long id = t.startUpdate(row);
info.setOffline(onlineOffline);
t.put(id, HConstants.COL_REGIONINFO, Writables.getBytes(info));
t.delete(id, HConstants.COL_SERVER);
t.delete(id, HConstants.COL_STARTCODE);
t.commit(id);
}
} }