arp7 commented on a change in pull request #1130: HDDS-1827. Load Snapshot info
when OM Ratis server starts.
URL: https://github.com/apache/hadoop/pull/1130#discussion_r316474797
##########
File path:
hadoop-ozone/integration-test/src/test/java/org/apache/hadoop/ozone/om/TestOzoneManagerHA.java
##########
@@ -1063,4 +1066,101 @@ static String createKey(OzoneBucket ozoneBucket)
throws IOException {
ozoneOutputStream.close();
return keyName;
}
+
+ @Test
+ public void testOMRestart() throws Exception {
+ // Get the leader OM
+ String leaderOMNodeId = objectStore.getClientProxy().getOMProxyProvider()
+ .getCurrentProxyOMNodeId();
+ OzoneManager leaderOM = cluster.getOzoneManager(leaderOMNodeId);
+
+ // Get follower OMs
+ OzoneManager followerOM1 = cluster.getOzoneManager(
+ leaderOM.getPeerNodes().get(0).getOMNodeId());
+ OzoneManager followerOM2 = cluster.getOzoneManager(
+ leaderOM.getPeerNodes().get(1).getOMNodeId());
+
+ // Do some transactions so that the log index increases
+ String userName = "user" + RandomStringUtils.randomNumeric(5);
+ String adminName = "admin" + RandomStringUtils.randomNumeric(5);
+ String volumeName = "volume" + RandomStringUtils.randomNumeric(5);
+ String bucketName = "bucket" + RandomStringUtils.randomNumeric(5);
+
+ VolumeArgs createVolumeArgs = VolumeArgs.newBuilder()
+ .setOwner(userName)
+ .setAdmin(adminName)
+ .build();
+
+ objectStore.createVolume(volumeName, createVolumeArgs);
+ OzoneVolume retVolumeinfo = objectStore.getVolume(volumeName);
+
+ retVolumeinfo.createBucket(bucketName);
+ OzoneBucket ozoneBucket = retVolumeinfo.getBucket(bucketName);
+
+ for (int i = 0; i < 10; i++) {
+ createKey(ozoneBucket);
+ }
+
+ long lastAppliedTxOnFollowerOM =
+ followerOM1.getOmRatisServer().getStateMachineLastAppliedIndex();
+
+ // Stop one follower OM
+ followerOM1.stop();
+
+ // Do more transactions. Stopped OM should miss these transactions and
+ // the logs corresponding to atleast some of the missed transactions
+ // should be purged. This will force the OM to install snapshot when
+ // restarted.
+ long minNewTxIndex = lastAppliedTxOnFollowerOM + (LOG_PURGE_GAP * 10);
Review comment:
There is no guarantee that the purge has occurred right?
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