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https://issues.apache.org/jira/browse/HBASE-7590?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13606341#comment-13606341
]
Hudson commented on HBASE-7590:
-------------------------------
Integrated in HBase-TRUNK-on-Hadoop-2.0.0 #454 (See
[https://builds.apache.org/job/HBase-TRUNK-on-Hadoop-2.0.0/454/])
HBASE-7590 Add a costless notifications mechanism from master to
regionservers & clients - new files (Revision 1458199)
HBASE-7590 Add a costless notifications mechanism from master to regionservers
& clients (Revision 1458184)
Result = FAILURE
nkeywal :
Files :
*
/hbase/trunk/hbase-client/src/main/java/org/apache/hadoop/hbase/client/ClusterStatusListener.java
*
/hbase/trunk/hbase-server/src/main/java/org/apache/hadoop/hbase/master/ClusterStatusPublisher.java
*
/hbase/trunk/hbase-server/src/test/java/org/apache/hadoop/hbase/master/TestClusterStatusPublisher.java
nkeywal :
Files :
* /hbase/trunk/hbase-client/pom.xml
* /hbase/trunk/hbase-client/src/main/java/org/apache/hadoop/hbase/Chore.java
*
/hbase/trunk/hbase-client/src/main/java/org/apache/hadoop/hbase/ClusterStatus.java
*
/hbase/trunk/hbase-client/src/main/java/org/apache/hadoop/hbase/client/HBaseAdmin.java
*
/hbase/trunk/hbase-client/src/main/java/org/apache/hadoop/hbase/client/HConnection.java
*
/hbase/trunk/hbase-client/src/main/java/org/apache/hadoop/hbase/client/HConnectionManager.java
*
/hbase/trunk/hbase-client/src/main/java/org/apache/hadoop/hbase/client/ServerCallable.java
*
/hbase/trunk/hbase-client/src/main/java/org/apache/hadoop/hbase/ipc/HBaseClient.java
*
/hbase/trunk/hbase-client/src/main/java/org/apache/hadoop/hbase/ipc/HBaseClientRPC.java
*
/hbase/trunk/hbase-client/src/main/java/org/apache/hadoop/hbase/ipc/ProtobufRpcClientEngine.java
*
/hbase/trunk/hbase-client/src/main/java/org/apache/hadoop/hbase/ipc/RpcClientEngine.java
*
/hbase/trunk/hbase-client/src/main/java/org/apache/hadoop/hbase/zookeeper/RecoverableZooKeeper.java
*
/hbase/trunk/hbase-common/src/main/java/org/apache/hadoop/hbase/HConstants.java
*
/hbase/trunk/hbase-server/src/main/java/org/apache/hadoop/hbase/master/AssignmentManager.java
*
/hbase/trunk/hbase-server/src/main/java/org/apache/hadoop/hbase/master/DeadServer.java
*
/hbase/trunk/hbase-server/src/main/java/org/apache/hadoop/hbase/master/HMaster.java
*
/hbase/trunk/hbase-server/src/main/java/org/apache/hadoop/hbase/master/HMasterCommandLine.java
*
/hbase/trunk/hbase-server/src/main/java/org/apache/hadoop/hbase/master/ServerManager.java
*
/hbase/trunk/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/MemStoreFlusher.java
*
/hbase/trunk/hbase-server/src/main/java/org/apache/hadoop/hbase/thrift/IncrementCoalescer.java
*
/hbase/trunk/hbase-server/src/test/java/org/apache/hadoop/hbase/HBaseCluster.java
*
/hbase/trunk/hbase-server/src/test/java/org/apache/hadoop/hbase/HBaseTestingUtility.java
*
/hbase/trunk/hbase-server/src/test/java/org/apache/hadoop/hbase/TestMultiVersions.java
*
/hbase/trunk/hbase-server/src/test/java/org/apache/hadoop/hbase/catalog/TestMetaReaderEditorNoCluster.java
*
/hbase/trunk/hbase-server/src/test/java/org/apache/hadoop/hbase/client/HConnectionTestingUtility.java
*
/hbase/trunk/hbase-server/src/test/java/org/apache/hadoop/hbase/client/TestAdmin.java
*
/hbase/trunk/hbase-server/src/test/java/org/apache/hadoop/hbase/client/TestHCM.java
*
/hbase/trunk/hbase-server/src/test/java/org/apache/hadoop/hbase/filter/TestFilterWithScanLimits.java
*
/hbase/trunk/hbase-server/src/test/java/org/apache/hadoop/hbase/filter/TestFilterWrapper.java
*
/hbase/trunk/hbase-server/src/test/java/org/apache/hadoop/hbase/mapreduce/TestTimeRangeMapRed.java
> Add a costless notifications mechanism from master to regionservers & clients
> -----------------------------------------------------------------------------
>
> Key: HBASE-7590
> URL: https://issues.apache.org/jira/browse/HBASE-7590
> Project: HBase
> Issue Type: Bug
> Components: Client, master, regionserver
> Affects Versions: 0.96.0
> Reporter: nkeywal
> Assignee: nkeywal
> Attachments: 7590.inprogress.patch, 7590.v12.patch, 7590.v12.patch,
> 7590.v13.patch, 7590.v1.patch, 7590.v1-rebased.patch, 7590.v2.patch,
> 7590.v3.patch, 7590.v5.patch, 7590.v5.patch
>
>
> t would be very useful to add a mechanism to distribute some information to
> the clients and regionservers. Especially It would be useful to know globally
> (regionservers + clients apps) that some regionservers are dead. This would
> allow:
> - to lower the load on the system, without clients using staled information
> and going on dead machines
> - to make the recovery faster from a client point of view. It's common to use
> large timeouts on the client side, so the client may need a lot of time
> before declaring a region server dead and trying another one. If the client
> receives the information separatly about a region server states, it can take
> the right decision, and continue/stop to wait accordingly.
> We can also send more information, for example instructions like 'slow down'
> to instruct the client to increase the retries delay and so on.
> Technically, the master could send this information. To lower the load on
> the system, we should:
> - have a multicast communication (i.e. the master does not have to connect to
> all servers by tcp), with once packet every 10 seconds or so.
> - receivers should not depend on this: if the information is available great.
> If not, it should not break anything.
> - it should be optional.
> So at the end we would have a thread in the master sending a protobuf message
> about the dead servers on a multicast socket. If the socket is not
> configured, it does not do anything. On the client side, when we receive an
> information that a node is dead, we refresh the cache about it.
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