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Posted to hdfs-issues@hadoop.apache.org by "Ayush Saxena (Jira)" <ji...@apache.org> on 2023/02/11 20:40:00 UTC
[jira] [Commented] (HDFS-15368) TestBalancerWithHANameNodes#testBalancerWithObserver failed occasionally
[ https://issues.apache.org/jira/browse/HDFS-15368?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17687484#comment-17687484 ]
Ayush Saxena commented on HDFS-15368:
-------------------------------------
Cherry-picked to branch-3.3
> TestBalancerWithHANameNodes#testBalancerWithObserver failed occasionally
> ------------------------------------------------------------------------
>
> Key: HDFS-15368
> URL: https://issues.apache.org/jira/browse/HDFS-15368
> Project: Hadoop HDFS
> Issue Type: Improvement
> Reporter: Xiaoqiao He
> Assignee: Xiaoqiao He
> Priority: Major
> Labels: balancer, test
> Fix For: 3.4.0, 3.3.9
>
> Attachments: HDFS-15368.001.patch, HDFS-15368.002.patch, TestBalancerWithHANameNodes.testBalancerObserver.log, TestBalancerWithHANameNodes.testBalancerObserver.log
>
>
> When I am working on HDFS-13183, I found that TestBalancerWithHANameNodes#testBalancerWithObserver failed occasionally, because the following code segment. Consider there are 1 ANN + 1 SBN + 2ONN, when invoke getBlocks with opening Observer Read feature, it could request any one of two ObserverNN based on my observation. So only verify the first ObserverNN and check times of invoke #getBlocks is not expected.
> {code:java}
> for (int i = 0; i < cluster.getNumNameNodes(); i++) {
> // First observer node is at idx 2, or 3 if 2 has been shut down
> // It should get both getBlocks calls, all other NNs should see 0 calls
> int expectedObserverIdx = withObserverFailure ? 3 : 2;
> int expectedCount = (i == expectedObserverIdx) ? 2 : 0;
> verify(namesystemSpies.get(i), times(expectedCount))
> .getBlocks(any(), anyLong(), anyLong());
> }
> {code}
> cc [~xkrogen],[~weichiu]. I am not very familiar for Observer Read feature, would you like give some suggestions?
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