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Posted to dev@hbase.apache.org by "stack (JIRA)" <ji...@apache.org> on 2008/04/01 20:58:24 UTC
[jira] Commented: (HBASE-507) In master, there are a load of places
where no sleep between retries
[ https://issues.apache.org/jira/browse/HBASE-507?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12584249#action_12584249 ]
stack commented on HBASE-507:
-----------------------------
+1 as patch for 0.1 branch. Lets do real fix in 0.2.
> In master, there are a load of places where no sleep between retries
> --------------------------------------------------------------------
>
> Key: HBASE-507
> URL: https://issues.apache.org/jira/browse/HBASE-507
> Project: Hadoop HBase
> Issue Type: Bug
> Affects Versions: 0.2.0, 0.1.1
> Reporter: stack
> Assignee: Jim Kellerman
> Fix For: 0.2.0, 0.1.1
>
> Attachments: 507-0.1.patch
>
>
> Here is an example:
> {code}
> 270308 2008-03-12 14:10:02,054 DEBUG org.apache.hadoop.hbase.HMaster: numberOfMetaRegions: 1, onlineMetaRegions.size(): 1
> 270309 2008-03-12 14:10:02,054 DEBUG org.apache.hadoop.hbase.HMaster: process server shutdown scanning .META.,,1 on XX.XX.XX.184:60020 HMaster
> 270310 2008-03-12 14:10:02,056 DEBUG org.apache.hadoop.hbase.HMaster: process server shutdown scanning .META.,,1 on XX.XX.XX.184:60020 HMaster
> 270311 2008-03-12 14:10:02,057 DEBUG org.apache.hadoop.hbase.HMaster: process server shutdown scanning .META.,,1 on XX.XX.XX.184:60020 HMaster
> 270312 2008-03-12 14:10:02,059 DEBUG org.apache.hadoop.hbase.HMaster: process server shutdown scanning .META.,,1 on XX.XX.XX.184:60020 HMaster
> 270313 2008-03-12 14:10:02,060 DEBUG org.apache.hadoop.hbase.HMaster: process server shutdown scanning .META.,,1 on XX.XX.XX.184:60020 HMaster
> 270314 2008-03-12 14:10:02,062 WARN org.apache.hadoop.hbase.HMaster: Processing pending operations: ProcessServerShutdown of XX.XX.XX.180:60020
> 270315 org.apache.hadoop.hbase.NotServingRegionException: org.apache.hadoop.hbase.NotServingRegionException .META.,,1
> 270316 at org.apache.hadoop.hbase.HRegionServer.getRegion(HRegionServer.java:1606)
> ...
> {code}
> Whats actually going on here is 5 retries without a wait in between (logging should include index numbering retry. Seems to be a bunch of duplicated code around retrying that we might be able to fix with a Callable. Jim Firby today suggested we do expotential backoffs in our retries.
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