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https://issues.apache.org/jira/browse/HDDS-1371?focusedWorklogId=225325&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-225325
]
ASF GitHub Bot logged work on HDDS-1371:
----------------------------------------
Author: ASF GitHub Bot
Created on: 09/Apr/19 23:02
Start Date: 09/Apr/19 23:02
Worklog Time Spent: 10m
Work Description: arp7 commented on pull request #703: HDDS-1371.
Download RocksDB checkpoint from OM Leader to Follower.
URL: https://github.com/apache/hadoop/pull/703#discussion_r273736777
##########
File path:
hadoop-ozone/ozone-manager/src/main/java/org/apache/hadoop/ozone/om/snapshot/OzoneManagerSnapshotProvider.java
##########
@@ -0,0 +1,206 @@
+/**
+ * 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.ozone.om.snapshot;
+
+import org.apache.commons.io.FileUtils;
+import org.apache.hadoop.conf.Configuration;
+import org.apache.hadoop.ozone.om.OMNodeDetails;
+import org.apache.hadoop.utils.db.DBCheckpoint;
+import org.apache.hadoop.utils.db.RocksDBCheckpoint;
+import org.apache.http.Header;
+import org.apache.http.HttpEntity;
+import org.apache.http.HttpResponse;
+import org.apache.http.client.HttpClient;
+import org.apache.http.client.config.RequestConfig;
+import org.apache.http.client.methods.HttpGet;
+import org.apache.http.impl.client.CloseableHttpClient;
+import org.apache.http.impl.client.HttpClientBuilder;
+import org.apache.http.util.EntityUtils;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import java.io.File;
+import java.io.IOException;
+import java.io.InputStream;
+import java.nio.file.Path;
+import java.nio.file.Paths;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.concurrent.TimeUnit;
+
+import static java.net.HttpURLConnection.HTTP_CREATED;
+import static java.net.HttpURLConnection.HTTP_OK;
+import static org.apache.hadoop.ozone.OmUtils.untarCheckpointFile;
+import static
org.apache.hadoop.ozone.OzoneConfigKeys.OZONE_SECURITY_ENABLED_DEFAULT;
+import static
org.apache.hadoop.ozone.OzoneConfigKeys.OZONE_SECURITY_ENABLED_KEY;
+import static org.apache.hadoop.ozone.OzoneConsts.OM_RATIS_SNAPSHOT_INDEX;
+import static
org.apache.hadoop.ozone.om.OMConfigKeys.OZONE_OM_SNAPSHOT_PROVIDER_CONNECTION_TIMEOUT_DEFAULT;
+import static
org.apache.hadoop.ozone.om.OMConfigKeys.OZONE_OM_SNAPSHOT_PROVIDER_REQUEST_TIMEOUT_DEFAULT;
+import static
org.apache.hadoop.ozone.om.OMConfigKeys.OZONE_OM_SNAPSHOT_PROVIDER_REQUEST_TIMEOUT_KEY;
+import static
org.apache.hadoop.ozone.om.OMConfigKeys.OZONE_OM_SNAPSHOT_PROVIDER_CONNECTION_TIMEOUT_KEY;
+import static
org.apache.hadoop.ozone.om.OMConfigKeys.OZONE_OM_SNAPSHOT_PROVIDER_SOCKET_TIMEOUT_DEFAULT;
+import static
org.apache.hadoop.ozone.om.OMConfigKeys.OZONE_OM_SNAPSHOT_PROVIDER_SOCKET_TIMEOUT_KEY;
+
+public class OzoneManagerSnapshotProvider {
Review comment:
Could you add a Javadoc for the class please?
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Issue Time Tracking
-------------------
Worklog Id: (was: 225325)
> Download RocksDB checkpoint from OM Leader to Follower
> ------------------------------------------------------
>
> Key: HDDS-1371
> URL: https://issues.apache.org/jira/browse/HDDS-1371
> Project: Hadoop Distributed Data Store
> Issue Type: Sub-task
> Reporter: Hanisha Koneru
> Assignee: Hanisha Koneru
> Priority: Major
> Labels: pull-request-available
> Time Spent: 1h
> Remaining Estimate: 0h
>
> If a follower OM is lagging way behind the leader OM or in case of a restart
> or bootstrapping, a follower OM might need RocksDB checkpoint from the leader
> to catch up with it. This is because the leader might have purged its logs
> after taking a snapshot.
> This Jira aims to add support to download a RocksDB checkpoint from leader
> OM to follower OM through a HTTP servlet. We reuse the DBCheckpoint servlet
> used by Recon server.
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