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[GitHub] [hadoop] Neilxzn opened a new pull request #3320: HDFS-16182.numOfReplicas is given the wrong value in BlockPlacementPolicyDefault$chooseTarget can cause DataStreamer to fail with Heterogeneous Storage.
Neilxzn opened a new pull request #3320:
URL: https://github.com/apache/hadoop/pull/3320
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### Description of PR
https://issues.apache.org/jira/browse/HDFS-16182
### How was this patch tested?
add TestBlockStoragePolicy.testAddDatanode2ExistingPipelineInSsd
### For code changes:
- [ ] Does the title or this PR starts with the corresponding JIRA issue id (e.g. 'HADOOP-17799. Your PR title ...')?
- [ ] Object storage: have the integration tests been executed and the endpoint declared according to the connector-specific documentation?
- [ ] If adding new dependencies to the code, are these dependencies licensed in a way that is compatible for inclusion under [ASF 2.0](http://www.apache.org/legal/resolved.html#category-a)?
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[GitHub] [hadoop] Neilxzn commented on pull request #3320: HDFS-16182.numOfReplicas is given the wrong value in BlockPlacementPolicyDefault$chooseTarget can cause DataStreamer to fail with Heterogeneous Storage.
Posted by GitBox <gi...@apache.org>.
Neilxzn commented on pull request #3320:
URL: https://github.com/apache/hadoop/pull/3320#issuecomment-906027161
Failed junit tests seem unrelated. And I try these tests in IDEA locally, these tests run pass.
- hadoop.hdfs.server.namenode.ha.TestEditLogTailer
- hadoop.hdfs.TestHDFSFileSystemContract
- hadoop.hdfs.server.datanode.TestDataNodeHotSwapVolumes
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[GitHub] [hadoop] Neilxzn commented on a change in pull request #3320: HDFS-16182.numOfReplicas is given the wrong value in BlockPlacementPolicyDefault$chooseTarget can cause DataStreamer to fail with Heterogeneous Storage.
Posted by GitBox <gi...@apache.org>.
Neilxzn commented on a change in pull request #3320:
URL: https://github.com/apache/hadoop/pull/3320#discussion_r695451621
##########
File path: hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/blockmanagement/BlockPlacementPolicyDefault.java
##########
@@ -469,7 +469,7 @@ private Node chooseTarget(int numOfReplicas,
LOG.trace("storageTypes={}", storageTypes);
try {
- if ((numOfReplicas = requiredStorageTypes.size()) == 0) {
Review comment:
done. Declare numOfReplicas a final variable at line 438.
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[GitHub] [hadoop] Neilxzn commented on pull request #3320: HDFS-16182.numOfReplicas is given the wrong value in BlockPlacementPolicyDefault$chooseTarget can cause DataStreamer to fail with Heterogeneous Storage.
Posted by GitBox <gi...@apache.org>.
Neilxzn commented on pull request #3320:
URL: https://github.com/apache/hadoop/pull/3320#issuecomment-905714180
> Thanks @Neilxzn for your works. Great catch here! LGTM. +1 once leaved nits comments fixed.
I think it is a bug just when fallback storage policy happens.
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[GitHub] [hadoop] Neilxzn commented on a change in pull request #3320: HDFS-16182.numOfReplicas is given the wrong value in BlockPlacementPolicyDefault$chooseTarget can cause DataStreamer to fail with Heterogeneous Storage.
Posted by GitBox <gi...@apache.org>.
Neilxzn commented on a change in pull request #3320:
URL: https://github.com/apache/hadoop/pull/3320#discussion_r695940727
##########
File path: hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/TestBlockStoragePolicy.java
##########
@@ -1337,6 +1337,50 @@ public void testChooseSsdOverDisk() throws Exception {
Assert.assertEquals(StorageType.DISK, targets[1].getStorageType());
}
+ @Test
Review comment:
Done.
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[GitHub] [hadoop] Neilxzn edited a comment on pull request #3320: HDFS-16182.numOfReplicas is given the wrong value in BlockPlacementPolicyDefault$chooseTarget can cause DataStreamer to fail with Heterogeneous Storage.
Posted by GitBox <gi...@apache.org>.
Neilxzn edited a comment on pull request #3320:
URL: https://github.com/apache/hadoop/pull/3320#issuecomment-904304994
@jojochuang Agree with you. I think we should fix it.
In my cluster, we use BlockPlacementPolicyDefault to choose dn and the number of SSD DN is much less than DISK DN. It may cause to some block that should be placed to SSD DNs fallback to place DISK DNs when SSD DNs are too busy or no enough place. Consider the following scenario.
1. Create empty file /foo_file
2. Set its storagepolicy to All_SSD
3. Put data to /foo_file
4. /foo_file gets 3 DISK dns for pipeline because SSD dns are too busy at the beginning.
5. When it transfers data in pipeline, one of 3 DISK dns shut down.
6. The client need to get one new dn for existing pipeline in DataStreamer$addDatanode2ExistingPipeline.
7. If SSD dns are available at the moment, namenode will choose the 3 SSD dns and return it to the client. However, the client just need one new dn, namenode returns 3 new SSD dn and the client threw exception in DataStreamer$findNewDatanode.
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[GitHub] [hadoop] jojochuang commented on a change in pull request #3320: HDFS-16182.numOfReplicas is given the wrong value in BlockPlacementPolicyDefault$chooseTarget can cause DataStreamer to fail with Heterogeneous Storage.
Posted by GitBox <gi...@apache.org>.
jojochuang commented on a change in pull request #3320:
URL: https://github.com/apache/hadoop/pull/3320#discussion_r695335223
##########
File path: hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/blockmanagement/BlockPlacementPolicyDefault.java
##########
@@ -469,7 +469,7 @@ private Node chooseTarget(int numOfReplicas,
LOG.trace("storageTypes={}", storageTypes);
try {
- if ((numOfReplicas = requiredStorageTypes.size()) == 0) {
Review comment:
better to declare numOfReplicas a final variable at line 438.
##########
File path: hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/TestBlockStoragePolicy.java
##########
@@ -1337,6 +1337,51 @@ public void testChooseSsdOverDisk() throws Exception {
Assert.assertEquals(StorageType.DISK, targets[1].getStorageType());
}
+ @Test
+ public void testAddDatanode2ExistingPipelineInSsd() throws Exception {
+ BlockStoragePolicy policy = POLICY_SUITE.getPolicy(ALLSSD);
+
+ final String[] racks = {"/d1/r1", "/d2/r2", "/d3/r3", "/d4/r4", "/d5/r5",
+ "/d6/r6", "/d7/r7"};
+ final String[] hosts = {"host1", "host2", "host3", "host4", "host5",
+ "host6", "host7"};
+ final StorageType[] disks = {StorageType.DISK, StorageType.DISK, StorageType.DISK};
+
+ final DatanodeStorageInfo[] diskStorages
+ = DFSTestUtil.createDatanodeStorageInfos(7, racks, hosts, disks);
+ final DatanodeDescriptor[] dataNodes
+ = DFSTestUtil.toDatanodeDescriptor(diskStorages);
+ for(int i = 0; i < dataNodes.length ; i++) {
+ BlockManagerTestUtil.updateStorage(dataNodes[i],
+ new DatanodeStorage("ssd" + i + 1, DatanodeStorage.State.NORMAL,
+ StorageType.SSD));
+ }
+
+ FileSystem.setDefaultUri(conf, "hdfs://localhost:0");
+ conf.set(DFSConfigKeys.DFS_NAMENODE_HTTP_ADDRESS_KEY, "0.0.0.0:0");
+ File baseDir = PathUtils.getTestDir(TestReplicationPolicy.class);
+ conf.set(DFSConfigKeys.DFS_NAMENODE_NAME_DIR_KEY,
+ new File(baseDir, "name").getPath());
+ DFSTestUtil.formatNameNode(conf);
+ NameNode namenode = new NameNode(conf);
+
+ final BlockManager bm = namenode.getNamesystem().getBlockManager();
+ BlockPlacementPolicy replicator = bm.getBlockPlacementPolicy();
+ NetworkTopology cluster = bm.getDatanodeManager().getNetworkTopology();
+ for (DatanodeDescriptor datanode : dataNodes) {
+ cluster.add(datanode);
+ }
+ // chsenDs are DISK StorageType to simulate not enough SDD Storage
+ List<DatanodeStorageInfo> chsenDs = new ArrayList<>();
+ chsenDs.add(diskStorages[0]);
+ chsenDs.add(diskStorages[1]);
+ DatanodeStorageInfo[] targets = replicator.chooseTarget("/foo", 1,
+ null, chsenDs, true,
+ new HashSet<Node>(), 0, policy, null);
+ System.out.println(policy.getName() + ": " + Arrays.asList(targets));
Review comment:
Please use log4j to log the message.
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[GitHub] [hadoop] Hexiaoqiao commented on a change in pull request #3320: HDFS-16182.numOfReplicas is given the wrong value in BlockPlacementPolicyDefault$chooseTarget can cause DataStreamer to fail with Heterogeneous Storage.
Posted by GitBox <gi...@apache.org>.
Hexiaoqiao commented on a change in pull request #3320:
URL: https://github.com/apache/hadoop/pull/3320#discussion_r695602966
##########
File path: hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/TestBlockStoragePolicy.java
##########
@@ -1337,6 +1337,50 @@ public void testChooseSsdOverDisk() throws Exception {
Assert.assertEquals(StorageType.DISK, targets[1].getStorageType());
}
+ @Test
Review comment:
Add some javadoc here will be more friendly here.
##########
File path: hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/blockmanagement/BlockPlacementPolicyDefault.java
##########
@@ -469,7 +469,7 @@ private Node chooseTarget(int numOfReplicas,
LOG.trace("storageTypes={}", storageTypes);
try {
- if ((numOfReplicas = requiredStorageTypes.size()) == 0) {
Review comment:
Just wonder if this is common bug for every `chooseTarget` invokes when assign `requiredStorageTypes.size()` to `numOfReplicas` here? or just for set storagePolicy?
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[GitHub] [hadoop] hadoop-yetus commented on pull request #3320: HDFS-16182.numOfReplicas is given the wrong value in BlockPlacementPolicyDefault$chooseTarget can cause DataStreamer to fail with Heterogeneous Storage.
Posted by GitBox <gi...@apache.org>.
hadoop-yetus commented on pull request #3320:
URL: https://github.com/apache/hadoop/pull/3320#issuecomment-903852770
:broken_heart: **-1 overall**
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| | | 449m 41s | | |
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| Subsystem | Report/Notes |
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| Max. process+thread count | 1983 (vs. ulimit of 5500) |
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[GitHub] [hadoop] hadoop-yetus commented on pull request #3320: HDFS-16182.numOfReplicas is given the wrong value in BlockPlacementPolicyDefault$chooseTarget can cause DataStreamer to fail with Heterogeneous Storage.
Posted by GitBox <gi...@apache.org>.
hadoop-yetus commented on pull request #3320:
URL: https://github.com/apache/hadoop/pull/3320#issuecomment-905536745
:broken_heart: **-1 overall**
| Vote | Subsystem | Runtime | Logfile | Comment |
|:----:|----------:|--------:|:--------:|:-------:|
| +0 :ok: | reexec | 1m 13s | | Docker mode activated. |
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| +1 :green_heart: | dupname | 0m 0s | | No case conflicting files found. |
| +0 :ok: | codespell | 0m 0s | | codespell was not available. |
| +1 :green_heart: | @author | 0m 0s | | The patch does not contain any @author tags. |
| +1 :green_heart: | test4tests | 0m 0s | | The patch appears to include 1 new or modified test files. |
|||| _ trunk Compile Tests _ |
| +1 :green_heart: | mvninstall | 34m 5s | | trunk passed |
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| | | 440m 16s | | |
| Reason | Tests |
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| Subsystem | Report/Notes |
|----------:|:-------------|
| Docker | ClientAPI=1.41 ServerAPI=1.41 base: https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-3320/2/artifact/out/Dockerfile |
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| Test Results | https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-3320/2/testReport/ |
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| modules | C: hadoop-hdfs-project/hadoop-hdfs U: hadoop-hdfs-project/hadoop-hdfs |
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[GitHub] [hadoop] Neilxzn commented on pull request #3320: HDFS-16182.numOfReplicas is given the wrong value in BlockPlacementPolicyDefault$chooseTarget can cause DataStreamer to fail with Heterogeneous Storage.
Posted by GitBox <gi...@apache.org>.
Neilxzn commented on pull request #3320:
URL: https://github.com/apache/hadoop/pull/3320#issuecomment-910066888
cc @jojochuang . Failed junit tests seem unrelated. Can you review this patch again? Thanks.
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[GitHub] [hadoop] jojochuang commented on pull request #3320: HDFS-16182.numOfReplicas is given the wrong value in BlockPlacementPolicyDefault$chooseTarget can cause DataStreamer to fail with Heterogeneous Storage.
Posted by GitBox <gi...@apache.org>.
jojochuang commented on pull request #3320:
URL: https://github.com/apache/hadoop/pull/3320#issuecomment-904299806
Don't really understand the code but seems like an ancient regression from HDFS-6686. As a general code advice, we should not update a parameter variable and pass it on.
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[GitHub] [hadoop] Neilxzn commented on pull request #3320: HDFS-16182.numOfReplicas is given the wrong value in BlockPlacementPolicyDefault$chooseTarget can cause DataStreamer to fail with Heterogeneous Storage.
Posted by GitBox <gi...@apache.org>.
Neilxzn commented on pull request #3320:
URL: https://github.com/apache/hadoop/pull/3320#issuecomment-904304994
Agree it. I think we should fix it.
In my cluster, we use BlockPlacementPolicyDefault to choose dn and the number of SSD DN is much less than DISK DN. It may cause to some block that should be placed to SSD DNs fallback to place DISK DNs when SSD DNs are too busy or no enough place. Consider the following scenario.
1. Create empty file /foo_file
2. Set its storagepolicy to All_SSD
3. Put data to /foo_file
4. /foo_file gets 3 DISK dns for pipeline because SSD dns are too busy at the beginning.
5. When it transfers data in pipeline, one of 3 DISK dns shut down.
6. The client need to get one new dn for existing pipeline in DataStreamer$addDatanode2ExistingPipeline.
7. If SSD dns are available at the moment, namenode will choose the 3 SSD dns and return it to the client. However, the client just need one new dn, namenode returns 3 new SSD dn and the client threw exception in DataStreamer$findNewDatanode.
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[GitHub] [hadoop] Neilxzn commented on pull request #3320: HDFS-16182.numOfReplicas is given the wrong value in BlockPlacementPolicyDefault$chooseTarget can cause DataStreamer to fail with Heterogeneous Storage.
Posted by GitBox <gi...@apache.org>.
Neilxzn commented on pull request #3320:
URL: https://github.com/apache/hadoop/pull/3320#issuecomment-905710927
Just wonder if this is common bug for every chooseTarget invokes when assign requiredStorageTypes.size() to numOfReplicas here? or just for set storagePolicy?
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[GitHub] [hadoop] jojochuang merged pull request #3320: HDFS-16182.numOfReplicas is given the wrong value in BlockPlacementPolicyDefault$chooseTarget can cause DataStreamer to fail with Heterogeneous Storage.
Posted by GitBox <gi...@apache.org>.
jojochuang merged pull request #3320:
URL: https://github.com/apache/hadoop/pull/3320
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[GitHub] [hadoop] Neilxzn commented on pull request #3320: HDFS-16182.numOfReplicas is given the wrong value in BlockPlacementPolicyDefault$chooseTarget can cause DataStreamer to fail with Heterogeneous Storage.
Posted by GitBox <gi...@apache.org>.
Neilxzn commented on pull request #3320:
URL: https://github.com/apache/hadoop/pull/3320#issuecomment-906450340
> @Neilxzn Please fix checkstyle and check failed unit tests first. Thanks
@Hexiaoqiao Thank you for your review.
1. About BlockPlacementPolicyDefault$chooseTarget, ParameterNumber checkstyle warning is not generated by this patch and it is hard to fix. Maybe we ignore it this patch?
2. I checked these failed tests agian and these tests run pass locally. And these tests seem unrelated. Please review these tests again. Thanks.
> hadoop.hdfs.server.namenode.ha.TestEditLogTailer
> hadoop.hdfs.server.blockmanagement.TestBlockTokenWithDFSStriped
> hadoop.hdfs.TestHDFSFileSystemContract
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[GitHub] [hadoop] Neilxzn commented on pull request #3320: HDFS-16182.numOfReplicas is given the wrong value in BlockPlacementPolicyDefault$chooseTarget can cause DataStreamer to fail with Heterogeneous Storage.
Posted by GitBox <gi...@apache.org>.
Neilxzn commented on pull request #3320:
URL: https://github.com/apache/hadoop/pull/3320#issuecomment-910066888
cc @jojochuang . Failed junit tests seem unrelated. Can you review this patch again? Thanks.
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[GitHub] [hadoop] Hexiaoqiao commented on pull request #3320: HDFS-16182.numOfReplicas is given the wrong value in BlockPlacementPolicyDefault$chooseTarget can cause DataStreamer to fail with Heterogeneous Storage.
Posted by GitBox <gi...@apache.org>.
Hexiaoqiao commented on pull request #3320:
URL: https://github.com/apache/hadoop/pull/3320#issuecomment-906072715
@Neilxzn Please fix checkstyle and check failed unit tests first. Thanks
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[GitHub] [hadoop] hadoop-yetus commented on pull request #3320: HDFS-16182.numOfReplicas is given the wrong value in BlockPlacementPolicyDefault$chooseTarget can cause DataStreamer to fail with Heterogeneous Storage.
Posted by GitBox <gi...@apache.org>.
hadoop-yetus commented on pull request #3320:
URL: https://github.com/apache/hadoop/pull/3320#issuecomment-906344882
:broken_heart: **-1 overall**
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| | | 452m 43s | | |
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| | hadoop.hdfs.server.blockmanagement.TestBlockTokenWithDFSStriped |
| | hadoop.hdfs.TestHDFSFileSystemContract |
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| Max. process+thread count | 2066 (vs. ulimit of 5500) |
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[GitHub] [hadoop] Neilxzn removed a comment on pull request #3320: HDFS-16182.numOfReplicas is given the wrong value in BlockPlacementPolicyDefault$chooseTarget can cause DataStreamer to fail with Heterogeneous Storage.
Posted by GitBox <gi...@apache.org>.
Neilxzn removed a comment on pull request #3320:
URL: https://github.com/apache/hadoop/pull/3320#issuecomment-905710927
Just wonder if this is common bug for every chooseTarget invokes when assign requiredStorageTypes.size() to numOfReplicas here? or just for set storagePolicy?
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[GitHub] [hadoop] hadoop-yetus commented on pull request #3320: HDFS-16182.numOfReplicas is given the wrong value in BlockPlacementPolicyDefault$chooseTarget can cause DataStreamer to fail with Heterogeneous Storage.
Posted by GitBox <gi...@apache.org>.
hadoop-yetus commented on pull request #3320:
URL: https://github.com/apache/hadoop/pull/3320#issuecomment-905964389
:broken_heart: **-1 overall**
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| Failed junit tests | hadoop.hdfs.server.namenode.ha.TestEditLogTailer |
| | hadoop.hdfs.TestHDFSFileSystemContract |
| | hadoop.hdfs.server.datanode.TestDataNodeHotSwapVolumes |
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