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https://issues.apache.org/jira/browse/HBASE-3918?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13071935#comment-13071935
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stack commented on HBASE-3918:
------------------------------
bq. How was this copying done?
It was hdfs copy I believe (Not replication)
bq. So how can i first copy the data from 0.89 version to 0.90. Sorry if my
query is very basic? Am not aware of replication.
So 0.89 data was copied from one cluster to another using distcp or something
and then a 0.90 was started over it.
> When assigning regions to an address, check the regionserver is actually
> online first
> -------------------------------------------------------------------------------------
>
> Key: HBASE-3918
> URL: https://issues.apache.org/jira/browse/HBASE-3918
> Project: HBase
> Issue Type: Bug
> Reporter: stack
>
> This one came up in the case where the data was copied from one cluster to
> another. The first cluster was running 0.89.x. The second 0.90.x. On
> startup of 0.90.x, it wanted to verify .META. was in the location -ROOT- said
> it was at, so it tried connect to the FIRST cluster. The attempt failed
> because of mismatched RPCs. The master then actually aborted.
> {code}
> org.apache.hadoop.hbase.ipc.HBaseRPC$VersionMismatch: Protocol
> org.apache.hadoop.hbase.ipc.HRegionInterface version mismatch. (client = 27,
> server = 24)
> at org.apache.hadoop.hbase.ipc.HBaseRPC.getProxy(HBaseRPC.java:424)
> at org.apache.hadoop.hbase.ipc.HBaseRPC.getProxy(HBaseRPC.java:393)
> at org.apache.hadoop.hbase.ipc.HBaseRPC.getProxy(HBaseRPC.java:444)
> at org.apache.hadoop.hbase.ipc.HBaseRPC.waitForProxy(HBaseRPC.java:349)
> at
> org.apache.hadoop.hbase.client.HConnectionManager$HConnectionImplementation.getHRegionConnection(HConnectionManager.java:965)
> at
> org.apache.hadoop.hbase.catalog.CatalogTracker.getCachedConnection(CatalogTracker.java:386)
> at
> org.apache.hadoop.hbase.catalog.CatalogTracker.getMetaServerConnection(CatalogTracker.java:285)
> at
> org.apache.hadoop.hbase.catalog.CatalogTracker.verifyMetaRegionLocation(CatalogTracker.java:486)
> at org.apache.hadoop.hbase.master.HMaster.assignRootAndMeta(HMaster.java:442)
> at
> org.apache.hadoop.hbase.master.HMaster.finishInitialization(HMaster.java:389)
> at org.apache.hadoop.hbase.master.HMaster.run(HMaster.java:283)
> 2011-05-23 22:38:07,720 INFO org.apache.hadoop.hbase.master.HMaster: Aborting
> {code}
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