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From "ASF GitHub Bot (JIRA)" <j...@apache.org>
Subject [jira] [Work logged] (HIVE-21841) Leader election in HMS to run housekeeping tasks.
Date Mon, 17 Jun 2019 05:17:02 GMT

     [ https://issues.apache.org/jira/browse/HIVE-21841?focusedWorklogId=261150&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-261150
]

ASF GitHub Bot logged work on HIVE-21841:
-----------------------------------------

                Author: ASF GitHub Bot
            Created on: 17/Jun/19 05:16
            Start Date: 17/Jun/19 05:16
    Worklog Time Spent: 10m 
      Work Description: maheshk114 commented on pull request #668: HIVE-21841 : Add configuration
to specify the hostname of HMS leader …to run housekeeping tasks in.
URL: https://github.com/apache/hive/pull/668#discussion_r294136502
 
 

 ##########
 File path: itests/hive-unit/src/test/java/org/apache/hadoop/hive/metastore/TestMetastoreHousekeepingLeader.java
 ##########
 @@ -0,0 +1,61 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.hadoop.hive.metastore;
+
+import org.junit.Assert;
+import org.junit.Before;
+import org.junit.Test;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import java.util.Map;
+
+/**
+ * Test for specifying a valid hostname as HMS leader.
+ */
+public class TestMetastoreHousekeepingLeader extends MetastoreHousekeepingLeaderTestBase
{
+  private static final Logger LOG = LoggerFactory.getLogger(TestMetastoreHousekeepingLeader.class);
+
+  @Before
+  public void setUp() throws Exception {
+    internalSetup("localhost");
 
 Review comment:
   insertnal stop can be added to stop the metastore. This way the test can be added in one
test file with no duplicate code.
 
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Issue Time Tracking
-------------------

    Worklog Id:     (was: 261150)
    Time Spent: 1h  (was: 50m)

> Leader election in HMS to run housekeeping tasks.
> -------------------------------------------------
>
>                 Key: HIVE-21841
>                 URL: https://issues.apache.org/jira/browse/HIVE-21841
>             Project: Hive
>          Issue Type: New Feature
>    Affects Versions: 4.0.0
>            Reporter: Ashutosh Bapat
>            Assignee: Ashutosh Bapat
>            Priority: Major
>              Labels: pull-request-available
>             Fix For: 4.0.0
>
>         Attachments: HIVE-21841.01.patch, HIVE-21841.02.patch
>
>          Time Spent: 1h
>  Remaining Estimate: 0h
>
> HMS performs housekeeping tasks. When there are multiple HMSes we need to have a leader
HMS elected which will carry out those housekeeping tasks. 
> These tasks include execution of compaction tasks, auto-discovering partitions for external
tables, generation of compaction tasks, repl thread etc.
> Note that, though the code for compaction tasks, auto-discovery of partitions etc. is
in Hive, the actual tasks are initiated by an HMS configured to do so. So, leader election
is required only for HMS and not for HS2.



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