Return-Path: X-Original-To: apmail-hbase-issues-archive@www.apache.org Delivered-To: apmail-hbase-issues-archive@www.apache.org Received: from mail.apache.org (hermes.apache.org [140.211.11.3]) by minotaur.apache.org (Postfix) with SMTP id CE90ED8E8 for ; Tue, 19 Mar 2013 12:03:17 +0000 (UTC) Received: (qmail 79447 invoked by uid 500); 19 Mar 2013 12:03:17 -0000 Delivered-To: apmail-hbase-issues-archive@hbase.apache.org Received: (qmail 79391 invoked by uid 500); 19 Mar 2013 12:03:17 -0000 Mailing-List: contact issues-help@hbase.apache.org; run by ezmlm Precedence: bulk List-Help: List-Unsubscribe: List-Post: List-Id: Delivered-To: mailing list issues@hbase.apache.org Received: (qmail 79352 invoked by uid 99); 19 Mar 2013 12:03:16 -0000 Received: from arcas.apache.org (HELO arcas.apache.org) (140.211.11.28) by apache.org (qpsmtpd/0.29) with ESMTP; Tue, 19 Mar 2013 12:03:16 +0000 Date: Tue, 19 Mar 2013 12:03:16 +0000 (UTC) From: "Hudson (JIRA)" To: issues@hbase.apache.org Message-ID: In-Reply-To: References: Subject: [jira] [Commented] (HBASE-7590) Add a costless notifications mechanism from master to regionservers & clients MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit X-JIRA-FingerPrint: 30527f35849b9dde25b450d4833f0394 [ https://issues.apache.org/jira/browse/HBASE-7590?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13606263#comment-13606263 ] Hudson commented on HBASE-7590: ------------------------------- Integrated in HBase-TRUNK #3972 (See [https://builds.apache.org/job/HBase-TRUNK/3972/]) 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 = SUCCESS 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. -- This message is automatically generated by JIRA. If you think it was sent incorrectly, please contact your JIRA administrators For more information on JIRA, see: http://www.atlassian.com/software/jira