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https://issues.apache.org/jira/browse/HDDS-1205?focusedWorklogId=215113&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-215113
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ASF GitHub Bot logged work on HDDS-1205:
----------------------------------------
Author: ASF GitHub Bot
Created on: 19/Mar/19 00:00
Start Date: 19/Mar/19 00:00
Worklog Time Spent: 10m
Work Description: arp7 commented on pull request #620: HDDS-1205.
Refactor ReplicationManager to handle QUASI_CLOSED contain…
URL: https://github.com/apache/hadoop/pull/620#discussion_r266640460
##########
File path:
hadoop-hdds/server-scm/src/main/java/org/apache/hadoop/hdds/scm/container/ReplicationManager.java
##########
@@ -0,0 +1,686 @@
+/**
+ * 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
+ * <p>
+ * http://www.apache.org/licenses/LICENSE-2.0
+ * <p>
+ * 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.hdds.scm.container;
+
+import com.google.common.annotations.VisibleForTesting;
+import org.apache.hadoop.conf.Configuration;
+import org.apache.hadoop.hdds.protocol.DatanodeDetails;
+import org.apache.hadoop.hdds.protocol.proto.HddsProtos.LifeCycleState;
+import org.apache.hadoop.hdds.protocol.proto
+ .StorageContainerDatanodeProtocolProtos.ContainerReplicaProto.State;
+import org.apache.hadoop.hdds.scm.ScmConfigKeys;
+import org.apache.hadoop.hdds.scm.container.placement.algorithms
+ .ContainerPlacementPolicy;
+import org.apache.hadoop.hdds.scm.events.SCMEvents;
+import org.apache.hadoop.hdds.server.events.EventPublisher;
+import org.apache.hadoop.ozone.lock.LockManager;
+import org.apache.hadoop.ozone.protocol.commands.CloseContainerCommand;
+import org.apache.hadoop.ozone.protocol.commands.CommandForDatanode;
+import org.apache.hadoop.ozone.protocol.commands.DeleteContainerCommand;
+import org.apache.hadoop.ozone.protocol.commands.ReplicateContainerCommand;
+import org.apache.hadoop.util.ExitUtil;
+import org.apache.hadoop.util.Time;
+import org.apache.ratis.util.Preconditions;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import java.io.IOException;
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.HashMap;
+import java.util.Iterator;
+import java.util.LinkedHashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.Set;
+import java.util.UUID;
+import java.util.concurrent.TimeUnit;
+import java.util.function.Predicate;
+import java.util.stream.Collectors;
+
+/**
+ * Replication Manager (RM) is the one which is responsible for making sure
+ * that the containers are properly replicated. Replication Manager deals only
+ * with Quasi Closed / Closed container.
+ */
+public class ReplicationManager {
+
+ private static final Logger LOG =
+ LoggerFactory.getLogger(ReplicationManager.class);
+
+ /**
+ * Reference to the ContainerManager.
+ */
+ private final ContainerManager containerManager;
+
+ /**
+ * PlacementPolicy which is used to identify where a container
+ * should be copied.
+ */
+ private final ContainerPlacementPolicy containerPlacement;
+
+ /**
+ * EventPublisher to fire Replicate and Delete container commands.
+ */
+ private final EventPublisher eventPublisher;
+
+ /**
+ * Used for locking a container with its ID while processing it.
+ */
+ private final LockManager<ContainerID> lockManager;
Review comment:
Can the locks just be embedded in the container object? Not a big deal and
we can revisit it in the future.
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Issue Time Tracking
-------------------
Worklog Id: (was: 215113)
Time Spent: 1h 20m (was: 1h 10m)
> Refactor ReplicationManager to handle QUASI_CLOSED containers
> -------------------------------------------------------------
>
> Key: HDDS-1205
> URL: https://issues.apache.org/jira/browse/HDDS-1205
> Project: Hadoop Distributed Data Store
> Issue Type: Improvement
> Components: SCM
> Reporter: Nanda kumar
> Assignee: Nanda kumar
> Priority: Major
> Labels: pull-request-available
> Attachments: HDDS-1205.000.patch, HDDS-1205.001.patch,
> HDDS-1205.002.patch
>
> Time Spent: 1h 20m
> Remaining Estimate: 0h
>
> This Jira is for refactoring the ReplicationManager code to handle all the
> scenarios that are possible with the introduction of QUASI_CLOSED state of a
> container.
> The new ReplicationManager will go through the complete set of containers in
> SCM to find out under/over replicated and unhealthy containers and takes
> appropriate action.
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