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https://issues.apache.org/jira/browse/HBASE-9426?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13946156#comment-13946156
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Hudson commented on HBASE-9426:
-------------------------------
FAILURE: Integrated in HBase-0.98-on-Hadoop-1.1 #233 (See
[https://builds.apache.org/job/HBase-0.98-on-Hadoop-1.1/233/])
HBASE-10812 Backport HBASE-9426 (Make custom distributed barrier procedure
pluggable) to 0.98.x (Demai Ni) (apurtell: rev 1581036)
*
/hbase/branches/0.98/hbase-client/src/main/java/org/apache/hadoop/hbase/client/HBaseAdmin.java
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/hbase/branches/0.98/hbase-client/src/main/java/org/apache/hadoop/hbase/client/HConnectionManager.java
* /hbase/branches/0.98/hbase-common/src/main/resources/hbase-default.xml
*
/hbase/branches/0.98/hbase-protocol/src/main/java/org/apache/hadoop/hbase/protobuf/generated/HBaseProtos.java
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/hbase/branches/0.98/hbase-protocol/src/main/java/org/apache/hadoop/hbase/protobuf/generated/MasterProtos.java
* /hbase/branches/0.98/hbase-protocol/src/main/protobuf/HBase.proto
* /hbase/branches/0.98/hbase-protocol/src/main/protobuf/Master.proto
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/hbase/branches/0.98/hbase-server/src/main/java/org/apache/hadoop/hbase/master/HMaster.java
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/hbase/branches/0.98/hbase-server/src/main/java/org/apache/hadoop/hbase/master/snapshot/SnapshotManager.java
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/hbase/branches/0.98/hbase-server/src/main/java/org/apache/hadoop/hbase/master/snapshot/TakeSnapshotHandler.java
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/hbase/branches/0.98/hbase-server/src/main/java/org/apache/hadoop/hbase/procedure/MasterProcedureManager.java
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/hbase/branches/0.98/hbase-server/src/main/java/org/apache/hadoop/hbase/procedure/MasterProcedureManagerHost.java
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/hbase/branches/0.98/hbase-server/src/main/java/org/apache/hadoop/hbase/procedure/ProcedureManager.java
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/hbase/branches/0.98/hbase-server/src/main/java/org/apache/hadoop/hbase/procedure/ProcedureManagerHost.java
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/hbase/branches/0.98/hbase-server/src/main/java/org/apache/hadoop/hbase/procedure/RegionServerProcedureManager.java
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/hbase/branches/0.98/hbase-server/src/main/java/org/apache/hadoop/hbase/procedure/RegionServerProcedureManagerHost.java
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/hbase/branches/0.98/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/HRegionServer.java
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/hbase/branches/0.98/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/snapshot/RegionServerSnapshotManager.java
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/hbase/branches/0.98/hbase-server/src/test/java/org/apache/hadoop/hbase/procedure/SimpleMasterProcedureManager.java
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/hbase/branches/0.98/hbase-server/src/test/java/org/apache/hadoop/hbase/procedure/SimpleRSProcedureManager.java
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/hbase/branches/0.98/hbase-server/src/test/java/org/apache/hadoop/hbase/procedure/TestProcedureManager.java
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/hbase/branches/0.98/hbase-server/src/test/java/org/apache/hadoop/hbase/snapshot/TestFlushSnapshotFromClient.java
> Make custom distributed barrier procedure pluggable
> ----------------------------------------------------
>
> Key: HBASE-9426
> URL: https://issues.apache.org/jira/browse/HBASE-9426
> Project: HBase
> Issue Type: Improvement
> Affects Versions: 0.95.2, 0.94.11
> Reporter: Richard Ding
> Assignee: Richard Ding
> Fix For: 0.99.0
>
> Attachments: HBASE-9426-4.patch, HBASE-9426-4.patch,
> HBASE-9426-6.patch, HBASE-9426-7.patch, HBASE-9426.patch.1,
> HBASE-9426.patch.2, HBASE-9426.patch.3
>
>
> Currently if one wants to implement a custom distributed barrier procedure
> (e.g., distributed log roll or distributed table flush), the HBase core code
> needs to be modified in order for the procedure to work.
> Looking into the snapshot code (especially on region server side), most of
> the code to enable the procedure are generic life-cycle management (i.e.,
> init, start, stop). We can make this part pluggable.
> Here is the proposal. Following the coprocessor example, we define two
> properties:
> {code}
> hbase.procedure.regionserver.classes
> hbase.procedure.master.classes
> {code}
> The values for both are comma delimited list of classes. On region server
> side, the classes implements the following interface:
> {code}
> public interface RegionServerProcedureManager {
> public void initialize(RegionServerServices rss) throws KeeperException;
> public void start();
> public void stop(boolean force) throws IOException;
> public String getProcedureName();
> }
> {code}
> While on Master side, the classes implement the interface:
> {code}
> public interface MasterProcedureManager {
> public void initialize(MasterServices master) throws KeeperException,
> IOException, UnsupportedOperationException;
> public void stop(String why);
> public String getProcedureName();
> public void execProcedure(ProcedureDescription desc) throws IOException;
> IOException;
> }
> {code}
> Where the ProcedureDescription is defined as
> {code}
> message ProcedureDescription {
> required string name = 1;
> required string instance = 2;
> optional int64 creationTime = 3 [default = 0];
> message Property {
> required string tag = 1;
> optional string value = 2;
> }
> repeated Property props = 4;
> }
> {code}
> A generic API can be defined on HMaster to trigger a procedure:
> {code}
> public boolean execProcedure(ProcedureDescription desc) throws IOException;
> {code}
> _SnapshotManager_ and _RegionServerSnapshotManager_ are special examples of
> _MasterProcedureManager_ and _RegionServerProcedureManager_. They will be
> automatically included (users don't need to specify them in the conf file).
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