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https://issues.apache.org/jira/browse/HDFS-15368?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Xiaoqiao He updated HDFS-15368:
-------------------------------
Attachment: HDFS-15368.002.patch
> 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
> 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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