Greetings,
we're running a small HBase 0.20.2 cluster composed of 3 Region
Servers. We would like to merge a couple of regions (PIG prefers
fewer regions).
So we're trying to use the merge tool the following way :
* we shutdown the whole HBase cluster
* we run : /opt/hbase/bin/hbase org.apache.hadoop.hbase.util.Merge
activity activity,1263674565165/351680030184661,1266505335728
activity,1263607560120/354059023781444,1266505307812
but we have the following errors :
2010-02-18 15:50:38,444 INFO [main] util.Merge(82): Verifying that
file system is available...
2010-02-18 15:50:38,449 INFO [main] util.Merge(91): Verifying that
HBase is not running...
2010-02-18 15:50:38,993 INFO [main]
client.HConnectionManager$TableServers(333): getMaster attempt 0 of 1
failed; no more retrying.
java.io.IOException:
org.apache.zookeeper.KeeperException$ConnectionLossException:
KeeperErrorCode = ConnectionLoss for /hbase/master
at
org.apache.hadoop.hbase.zookeeper.ZooKeeperWrapper.readAddressOrThrow(ZooKeeperWrapper.java:332)
at
org.apache.hadoop.hbase.zookeeper.ZooKeeperWrapper.readMasterAddressOrThrow(ZooKeeperWrapper.java:240)
at
org.apache.hadoop.hbase.client.HConnectionManager$TableServers.getMaster(HConnectionManager.java:318)
at org.apache.hadoop.hbase.client.HBaseAdmin.<init>(HBaseAdmin.java:72)
at
org.apache.hadoop.hbase.client.HBaseAdmin.checkHBaseAvailable(HBaseAdmin.java:840)
at org.apache.hadoop.hbase.util.Merge.run(Merge.java:93)
at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:65)
at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:79)
at org.apache.hadoop.hbase.util.Merge.main(Merge.java:382)
Caused by: org.apache.zookeeper.KeeperException$ConnectionLossException:
KeeperErrorCode = ConnectionLoss for /hbase/master
at org.apache.zookeeper.KeeperException.create(KeeperException.java:90)
at org.apache.zookeeper.KeeperException.create(KeeperException.java:42)
at org.apache.zookeeper.ZooKeeper.getData(ZooKeeper.java:892)
at
org.apache.hadoop.hbase.zookeeper.ZooKeeperWrapper.readAddressOrThrow(ZooKeeperWrapper.java:328)
... 8 more
2010-02-18 15:50:39,006 ERROR [main] util.Merge(384): exiting due to error
java.lang.IllegalArgumentException: Wrong FS: hdfs://xen13:9000/hbase,
expected: file:///
at org.apache.hadoop.fs.FileSystem.checkPath(FileSystem.java:305)
at org.apache.hadoop.fs.FileSystem.makeQualified(FileSystem.java:217)
at
org.apache.hadoop.fs.FilterFileSystem.makeQualified(FilterFileSystem.java:79)
at org.apache.hadoop.hbase.util.FSUtils.getRootDir(FSUtils.java:259)
at org.apache.hadoop.hbase.util.MetaUtils.initialize(MetaUtils.java:89)
at org.apache.hadoop.hbase.util.MetaUtils.<init>(MetaUtils.java:79)
at org.apache.hadoop.hbase.util.Merge.run(Merge.java:102)
at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:65)
at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:79)
at org.apache.hadoop.hbase.util.Merge.main(Merge.java:382)
By the way, could I run the merge tool safely ? I've read some jira
comments about adjacent regions, is it a requirement ? How could I
check that ?
Thanks
