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https://issues.apache.org/jira/browse/HDFS-12112?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Akira Ajisaka updated HDFS-12112:
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Fix Version/s: (was: 2.8.3)
2.8.2
> TestBlockManager#testBlockManagerMachinesArray sometimes fails with NPE
> -----------------------------------------------------------------------
>
> Key: HDFS-12112
> URL: https://issues.apache.org/jira/browse/HDFS-12112
> Project: Hadoop HDFS
> Issue Type: Bug
> Affects Versions: 3.0.0-beta1
> Environment: CDH5.12.0
> Reporter: Wei-Chiu Chuang
> Assignee: Wei-Chiu Chuang
> Priority: Minor
> Fix For: 2.9.0, 3.0.0-beta1, 2.8.2
>
> Attachments: HDFS-12112.001.patch
>
>
> Found the following error:
> {quote}
> java.lang.NullPointerException: null
> at
> org.apache.hadoop.hdfs.server.blockmanagement.TestBlockManager.testBlockManagerMachinesArray(TestBlockManager.java:1202)
> {quote}
> The NPE suggests corruptStorageDataNode in the following code snippet could
> be null.
> {code}
> for(int i=0; i<corruptStorageDataNode.getStorageInfos().length; i++) {
> {code}
> Looking at the code, the test does not wait for file replication to happen,
> which is why corruptStorageDataNode (the DN of the second replica) is null.
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