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https://issues.apache.org/jira/browse/HBASE-609?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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stack updated HBASE-609:
------------------------
Attachment: skew-0.1-v3.patch
Here is new version of patch made after study of all uses of
System.currentMillis. Testing, this version of patch fixes HBASE-478,
"offlining of table does not run reliably"
Please review.
{code}
When we scan, use LATEST_TIMESTAMP rather than currentTimeMillis.
When we use current time, its the time on the machine that is running
the scan. If clock skew, it may be asking for a view on table that
is behind latest version. This for sure is problem in catalog tables.
M src/test/org/apache/hadoop/hbase/MultiRegionTable.java
M src/java/org/apache/hadoop/hbase/HMerge.java
M src/java/org/apache/hadoop/hbase/HBaseAdmin.java
Use LATEST_TIMESTAMP opening scanners.
M src/java/org/apache/hadoop/hbase/HMaster.java
Use LATEST_TIMESTAMP opening scanners. Also, use new batchUpdate
method - one that doesn't take a timestamp rather than specify
current time of this server.
M src/java/org/apache/hadoop/hbase/HRegionInterface.java
Added overload of batchUpdate that doesn't take a timestamp
M src/java/org/apache/hadoop/hbase/HRegion.java
Use batchUpdate that doesn't take an argument.
M src/java/org/apache/hadoop/hbase/HRegionServer.java
Add overload of batchUpdate.
{code}
> Master doesn't see regionserver edits because of clock skew
> -----------------------------------------------------------
>
> Key: HBASE-609
> URL: https://issues.apache.org/jira/browse/HBASE-609
> Project: Hadoop HBase
> Issue Type: Bug
> Reporter: stack
> Priority: Blocker
> Fix For: 0.2.0, 0.1.2
>
> Attachments: skew-0.1-v2.patch, skew-0.1-v3.patch, skew.patch
>
>
> The streamy folks had a cluster where regionserver was 2 minutes in advance
> of the master. On split, regionserver would update .META. with split info
> but scanners opened on the master wouldn't see the edits because they were
> being opened using current time.
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