region_mover.rb fails to load -ROOT- region back to original server in
deployment with no user tables.
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Key: HBASE-5502
URL: https://issues.apache.org/jira/browse/HBASE-5502
Project: HBase
Issue Type: Bug
Components: scripts
Affects Versions: 0.92.0
Environment: Ubuntu precise
Reporter: James Page
Priority: Minor
The region_mover loadRegion function incorrectly uses 'isSuccessfulScan':
{noformat}
for r in regions
exists = false
begin
exists = isSuccessfulScan(admin, r)
rescue org.apache.hadoop.hbase.NotServingRegionException => e
$LOG.info("Failed scan of " + e.message)
end
{noformat}
isSuccessfulScan throws an exception when it fails rather than returning status.
As a result empty regions don't get restored - this is the case in a fresh
install (which is how I discovered this) with no user table.
Modifying the code to set exists IF isSuccessfulScan does not throw an
exception worked for me:
{noformat}
for r in regions
exists = false
begin
isSuccessfulScan(admin, r)
exists = true
rescue org.apache.hadoop.hbase.NotServingRegionException => e
$LOG.info("Failed scan of " + e.message)
end
{noformat}
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