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https://issues.apache.org/jira/browse/HBASE-6581?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13755811#comment-13755811
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stack commented on HBASE-6581:
------------------------------
I'd imagine we'd get the method once on startup and then it would never change
during the life of the WAL?
bq. FSHLog#syncer has some synchronized block, but still one call to
PBLW.sync() is not in a synchronized block. so this maybe a problem. I guess we
can't change like that the unsynchronized code block FSHLog (line 1068) without
side-effect (the logic seems there quite tricky).
I'm not the expert here. The less synchronization hereabouts the better but
current state comes of study by others.
Copy/paste is probably fine especially if you feel it 'safer'.
> Build with hadoop.profile=3.0
> -----------------------------
>
> Key: HBASE-6581
> URL: https://issues.apache.org/jira/browse/HBASE-6581
> Project: HBase
> Issue Type: Bug
> Reporter: Eric Charles
> Assignee: Eric Charles
> Attachments: HBASE-6581-1.patch, HBASE-6581-20130821.patch,
> HBASE-6581-2.patch, HBASE-6581-3.patch, HBASE-6581-4.patch, HBASE-6581.diff,
> HBASE-6581.diff
>
>
> Building trunk with hadoop.profile=3.0 gives exceptions (see [1]) due to
> change in the hadoop maven modules naming (and also usage of 3.0-SNAPSHOT
> instead of 3.0.0-SNAPSHOT in hbase-common).
> I can provide a patch that would move most of hadoop dependencies in their
> respective profiles and will define the correct hadoop deps in the 3.0
> profile.
> Please tell me if that's ok to go this way.
> Thx, Eric
> [1]
> $ mvn clean install -Dhadoop.profile=3.0
> [INFO] Scanning for projects...
> [ERROR] The build could not read 3 projects -> [Help 1]
> [ERROR]
> [ERROR] The project org.apache.hbase:hbase-server:0.95-SNAPSHOT
> (/d/hbase.svn/hbase-server/pom.xml) has 3 errors
> [ERROR] 'dependencies.dependency.version' for
> org.apache.hadoop:hadoop-common:jar is missing. @ line 655, column 21
> [ERROR] 'dependencies.dependency.version' for
> org.apache.hadoop:hadoop-annotations:jar is missing. @ line 659, column 21
> [ERROR] 'dependencies.dependency.version' for
> org.apache.hadoop:hadoop-minicluster:jar is missing. @ line 663, column 21
> [ERROR]
> [ERROR] The project org.apache.hbase:hbase-common:0.95-SNAPSHOT
> (/d/hbase.svn/hbase-common/pom.xml) has 3 errors
> [ERROR] 'dependencies.dependency.version' for
> org.apache.hadoop:hadoop-common:jar is missing. @ line 170, column 21
> [ERROR] 'dependencies.dependency.version' for
> org.apache.hadoop:hadoop-annotations:jar is missing. @ line 174, column 21
> [ERROR] 'dependencies.dependency.version' for
> org.apache.hadoop:hadoop-minicluster:jar is missing. @ line 178, column 21
> [ERROR]
> [ERROR] The project org.apache.hbase:hbase-it:0.95-SNAPSHOT
> (/d/hbase.svn/hbase-it/pom.xml) has 3 errors
> [ERROR] 'dependencies.dependency.version' for
> org.apache.hadoop:hadoop-common:jar is missing. @ line 220, column 18
> [ERROR] 'dependencies.dependency.version' for
> org.apache.hadoop:hadoop-annotations:jar is missing. @ line 224, column 21
> [ERROR] 'dependencies.dependency.version' for
> org.apache.hadoop:hadoop-minicluster:jar is missing. @ line 228, column 21
> [ERROR]
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