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https://issues.apache.org/jira/browse/DRILL-7191?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16838816#comment-16838816
]
ASF GitHub Bot commented on DRILL-7191:
---------------------------------------
HanumathRao commented on pull request #1762: [DRILL-7191 / DRILL-7026]: RM
state blob persistence in Zookeeper and Integration of Distributed queue
configuration with Planner
URL: https://github.com/apache/drill/pull/1762#discussion_r283490423
##########
File path:
exec/java-exec/src/main/java/org/apache/drill/exec/resourcemgr/rmblobmgr/RMConsistentBlobStoreManager.java
##########
@@ -0,0 +1,354 @@
+/*
+ * 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.drill.exec.resourcemgr.rmblobmgr;
+
+import avro.shaded.com.google.common.annotations.VisibleForTesting;
+import com.fasterxml.jackson.core.JsonGenerator;
+import com.fasterxml.jackson.core.JsonParser;
+import com.fasterxml.jackson.databind.ObjectMapper;
+import com.fasterxml.jackson.databind.SerializationFeature;
+import com.fasterxml.jackson.databind.module.SimpleModule;
+import org.apache.curator.framework.recipes.locks.InterProcessMutex;
+import org.apache.drill.common.scanner.persistence.ScanResult;
+import org.apache.drill.exec.coord.zk.ZKClusterCoordinator;
+import org.apache.drill.exec.exception.StoreException;
+import org.apache.drill.exec.resourcemgr.NodeResources;
+import org.apache.drill.exec.resourcemgr.NodeResources.NodeResourcesDe;
+import org.apache.drill.exec.resourcemgr.config.QueryQueueConfig;
+import
org.apache.drill.exec.resourcemgr.rmblobmgr.exception.LeaderChangeException;
+import
org.apache.drill.exec.resourcemgr.rmblobmgr.exception.RMBlobUpdateException;
+import
org.apache.drill.exec.resourcemgr.rmblobmgr.exception.ResourceUnavailableException;
+import org.apache.drill.exec.resourcemgr.rmblobmgr.rmblob.ClusterStateBlob;
+import
org.apache.drill.exec.resourcemgr.rmblobmgr.rmblob.ForemanQueueUsageBlob;
+import org.apache.drill.exec.resourcemgr.rmblobmgr.rmblob.ForemanResourceUsage;
+import
org.apache.drill.exec.resourcemgr.rmblobmgr.rmblob.ForemanResourceUsage.ForemanResourceUsageDe;
+import org.apache.drill.exec.resourcemgr.rmblobmgr.rmblob.QueueLeadershipBlob;
+import org.apache.drill.exec.resourcemgr.rmblobmgr.rmblob.RMStateBlob;
+import org.apache.drill.exec.server.DrillbitContext;
+import org.apache.drill.exec.store.sys.PersistentStoreConfig;
+import
org.apache.drill.exec.store.sys.store.ZookeeperTransactionalPersistenceStore;
+
+import java.util.ArrayList;
+import java.util.Collection;
+import java.util.HashMap;
+import java.util.Iterator;
+import java.util.List;
+import java.util.Map;
+import java.util.stream.Collectors;
+
+/**
+ * RM state blobs manager which does all the update to the blobs under a
global lock and in transactional manner.
+ * Since the blobs are updated by multiple Drillbit at same time to maintain
the strongly consistent information in
+ * these blobs it uses a global lock shared across all the Drillbits.
+ */
+public class RMConsistentBlobStoreManager implements RMBlobStoreManager {
+ private static final org.slf4j.Logger logger =
org.slf4j.LoggerFactory.getLogger(RMConsistentBlobStoreManager.class);
+
+ private static final String RM_BLOBS_ROOT = "rm/blobs";
Review comment:
do we need to start this path with "/" ?
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> RM blobs persistence in Zookeeper for Distributed RM
> ----------------------------------------------------
>
> Key: DRILL-7191
> URL: https://issues.apache.org/jira/browse/DRILL-7191
> Project: Apache Drill
> Issue Type: Sub-task
> Components: Server, Query Planning & Optimization
> Affects Versions: 1.17.0
> Reporter: Hanumath Rao Maduri
> Assignee: Sorabh Hamirwasia
> Priority: Major
> Fix For: 1.17.0
>
>
> Changes to support storing UUID for each Drillbit Service Instance locally to
> be used by planner and execution layer. This UUID is used to uniquely
> identify a Drillbit and register Drillbit information in the RM StateBlobs.
> Introduced a PersistentStore named ZookeeperTransactionalPersistenceStore
> with Transactional capabilities using Zookeeper Transactional API’s. This is
> used for updating RM State blobs as all the updates need to happen in
> transactional manner. Added RMStateBlobs definition and support for serde to
> Zookeeper.
> Implementation for DistributedRM and its corresponding QueryRM apis and state
> management.
> Updated the state management of Query in Foreman so that same Foreman object
> can be submitted multiple times. Also introduced concept of 2 maps keeping
> track of waiting and running queries. These were done to support for async
> admit protocol which will be needed with Distributed RM.
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