Liu Shaohui created HBASE-8522:
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Summary: Archived hfiles and old hlogs may be deleted immediatly
by HFileCleaner, LogCleaner in HMaster
Key: HBASE-8522
URL: https://issues.apache.org/jira/browse/HBASE-8522
Project: HBase
Issue Type: Bug
Reporter: Liu Shaohui
Assignee: Liu Shaohui
Priority: Minor
TimeToLiveHFileCleaner is configed to 'hbase.master.hfilecleaner.plugins' in
hbase-default.xml. And timeToLiveHFileCleaner uses the modify time of the hfile
to determine if it should be deleted. But, the modify time of the hdfs file is
time when its writer is closed. The rename op will not change the modify time
of the hfile. So the hfile may be deleted immediatly by HFileCleaner after it
is moved to archives. So log:
2013-05-08 08:15:46,053 DEBUG
org.apache.hadoop.hbase.master.cleaner.CleanerChore: Checking directory:
hdfs://hbase/.archive/table/4e48ffc1ec089082c66e6d1b5f018fb5/M/729e8bc1430540cb9b2c147c90039cdc
2013-05-08 08:15:46,055 DEBUG org.apache.hadoop.ipc.ProtobufRpcEngine: Call:
getFileInfo took 1ms
2013-05-08 08:15:46,055 DEBUG
org.apache.hadoop.hbase.master.cleaner.TimeToLiveHFileCleaner: Life:40033567,
ttl:300000, current:1367972146054, from: 1367932112487
2013-05-08 08:15:46,055 DEBUG
org.apache.hadoop.hbase.master.cleaner.CleanerChore:
Removing:hdfs://hbase/.archive/table/4e48ffc1ec089082c66e6d1b5f018fb5/M/729e8bc1430540cb9b2c147c90039cdc
from archive
The same to old hlogs.
And my solution is very simple: When hfiles and hlogs are archived, we set the
modify time of files after rename.
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